1Gb, 3V, Multiple I/O Serial NOR Flash Memory Features Micron Serial NOR Flash Memory 3V, Multiple I/O, 4KB Sector Erase N25Q00AA Features * * * * * * * * * * * * * * * * * Write protection - Software write protection applicable to every 64KB sector via volatile lock bit - Hardware write protection: protected area size defined by five nonvolatile bits (BP0, BP1, BP2, BP3, and TB) - Additional smart protections, available upon request * Electronic signature - JEDEC-standard 2-byte signature (BA21h) - Unique ID code (UID): 17 read-only bytes, including: Two additional extended device ID bytes to identify device factory options; and customized factory data (14 bytes) * Minimum 100,000 ERASE cycles per sector * More than 20 years data retention * Packages - JEDEC-standard, all RoHS-compliant - L-PBGA-24b05/6mm x 8mm ( also known as LBGA24 ) - SOP2-16/300 mils (also known as SO16W, SO16Wide, SOIC-16 ) Stacked device (four 256Mb die) SPI-compatible serial bus interface Double transfer rate (DTR) mode 2.7-3.6V single supply voltage 108 MHz (MAX) clock frequency supported for all protocols in single transfer rate (STR) mode 54 MHz (MAX) clock frequency supported for all protocols in DTR mode Dual/quad I/O instruction provides increased throughput up to 54 MB/s Supported protocols - Extended SPI, dual I/O, and quad I/O - DTR mode supported on all Execute-in-place (XIP) mode for all three protocols - Configurable via volatile or nonvolatile registers - Enables memory to work in XIP mode directly after power-on PROGRAM/ERASE SUSPEND operations Available protocols - Available READ operations - Quad or dual output fast read - Quad or dual I/O fast read Flexible to fit application - Configurable number of dummy cycles - Output buffer configurable Software reset 3-byte and 4-byte addressability mode supported 64-byte, user-lockable, one-time programmable (OTP) dedicated area Erase capability - Subsector erase 4KB uniform granularity blocks - Sector erase 64KB uniform granularity blocks - Single die erase (32MB) 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. Products and specifications discussed herein are subject to change by Micron without notice. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Features Contents Important Notes and Warnings ......................................................................................................................... 6 Device Description ........................................................................................................................................... 7 Features ....................................................................................................................................................... 7 3-Byte Address and 4-Byte Address Modes ..................................................................................................... 7 Operating Protocols ...................................................................................................................................... 7 XIP Mode ..................................................................................................................................................... 8 Device Configurability .................................................................................................................................. 8 Signal Assignments ........................................................................................................................................... 9 Signal Descriptions ......................................................................................................................................... 10 Memory Organization .................................................................................................................................... 12 Memory Configuration and Block Diagram .................................................................................................. 12 Memory Map - 1Gb Density ............................................................................................................................ 13 Device Protection ........................................................................................................................................... 14 Serial Peripheral Interface Modes .................................................................................................................... 17 SPI Protocols .................................................................................................................................................. 19 Nonvolatile and Volatile Registers ................................................................................................................... 20 Status Register ............................................................................................................................................ 21 Nonvolatile and Volatile Configuration Registers .......................................................................................... 22 Extended Address Register .......................................................................................................................... 25 Enhanced Volatile Configuration Register .................................................................................................... 26 Flag Status Register ..................................................................................................................................... 27 Command Definitions .................................................................................................................................... 29 READ REGISTER and WRITE REGISTER Operations ........................................................................................ 32 READ STATUS REGISTER or FLAG STATUS REGISTER Command ................................................................ 32 READ NONVOLATILE CONFIGURATION REGISTER Command ................................................................... 33 READ VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command .................................. 33 READ EXTENDED ADDRESS REGISTER Command ..................................................................................... 34 WRITE STATUS REGISTER Command ......................................................................................................... 34 WRITE NONVOLATILE CONFIGURATION REGISTER Command ................................................................. 35 WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command ................................. 35 WRITE EXTENDED ADDRESS REGISTER Command ................................................................................... 36 READ LOCK REGISTER Command .............................................................................................................. 36 WRITE LOCK REGISTER Command ............................................................................................................ 37 CLEAR FLAG STATUS REGISTER Command ................................................................................................ 38 READ IDENTIFICATION Operations ............................................................................................................... 39 READ ID and MULTIPLE I/O READ ID Commands ...................................................................................... 39 READ SERIAL FLASH DISCOVERY PARAMETER Command ......................................................................... 40 READ MEMORY Operations ............................................................................................................................ 44 3-Byte Address ........................................................................................................................................... 44 4-Byte Address ........................................................................................................................................... 45 READ MEMORY Operations Timing - Single Transfer Rate ........................................................................... 47 READ MEMORY Operations Timing - Double Transfer Rate ......................................................................... 51 PROGRAM Operations .................................................................................................................................... 55 WRITE Operations .......................................................................................................................................... 60 WRITE ENABLE Command ......................................................................................................................... 60 WRITE DISABLE Command ........................................................................................................................ 60 ERASE Operations .......................................................................................................................................... 62 SUBSECTOR ERASE Command ................................................................................................................... 62 SECTOR ERASE Command ......................................................................................................................... 62 DIE ERASE Command ................................................................................................................................ 63 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 2 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Features PROGRAM/ERASE SUSPEND Command ..................................................................................................... PROGRAM/ERASE RESUME Command ...................................................................................................... RESET Operations .......................................................................................................................................... RESET ENABLE and RESET MEMORY Command ........................................................................................ RESET Conditions ...................................................................................................................................... ONE-TIME PROGRAMMABLE Operations ....................................................................................................... READ OTP ARRAY Command ...................................................................................................................... PROGRAM OTP ARRAY Command .............................................................................................................. ADDRESS MODE Operations - Enter and Exit 4-Byte Address Mode ................................................................. ENTER or EXIT 4-BYTE ADDRESS MODE Command ................................................................................... XIP Mode ....................................................................................................................................................... Activate or Terminate XIP Using Volatile Configuration Register ................................................................... Activate or Terminate XIP Using Nonvolatile Configuration Register ............................................................. Confirmation Bit Settings Required to Activate or Terminate XIP .................................................................. Terminating XIP After a Controller and Memory Reset ................................................................................. Power-Up and Power-Down ............................................................................................................................ Power-Up and Power-Down Requirements .................................................................................................. Power Loss Recovery Sequence ................................................................................................................... AC Reset Specifications ................................................................................................................................... Absolute Ratings and Operating Conditions ..................................................................................................... DC Characteristics and Operating Conditions .................................................................................................. AC Characteristics and Operating Conditions .................................................................................................. Package Dimensions ....................................................................................................................................... Part Number Ordering Information ................................................................................................................. Revision History ............................................................................................................................................. Rev. N - 02/18 ............................................................................................................................................. Rev. M - 03/14 ............................................................................................................................................ Rev. L - 01/14 ............................................................................................................................................. Rev. K - 09/13 ............................................................................................................................................. Rev. J - 07/13 .............................................................................................................................................. Rev. I - 02/13 .............................................................................................................................................. Rev. H - 11/12 ............................................................................................................................................. Rev. G - 11/12 ............................................................................................................................................. Rev. F - 06/12 ............................................................................................................................................. Rev. E - 02/12 ............................................................................................................................................. Rev. D - 01/12 ............................................................................................................................................. Rev. C - 11/11 ............................................................................................................................................. Rev. B - 11/11 ............................................................................................................................................. Rev. A - 08/11 ............................................................................................................................................. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 3 64 66 67 67 67 68 68 68 70 70 71 71 71 72 73 74 74 75 76 80 82 83 85 87 89 89 89 89 89 89 89 89 89 89 90 90 90 90 90 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Features List of Figures Figure 1: Logic Diagram ................................................................................................................................... 8 Figure 2: 24-Ball LBGA (Balls Down) ................................................................................................................. 9 Figure 3: 16-Pin, Plastic Small Outline -- SO16 (Top View) ................................................................................ 9 Figure 4: Block Diagram ................................................................................................................................ 12 Figure 5: Bus Master and Memory Devices on the SPI Bus ............................................................................... 18 Figure 6: SPI Modes ....................................................................................................................................... 18 Figure 7: Internal Configuration Register ........................................................................................................ 20 Figure 8: Upper and Lower Memory Array Segments ....................................................................................... 25 Figure 9: READ REGISTER Command ............................................................................................................ 33 Figure 10: WRITE REGISTER Command ......................................................................................................... 35 Figure 11: READ LOCK REGISTER Command ................................................................................................. 37 Figure 12: WRITE LOCK REGISTER Command ............................................................................................... 38 Figure 13: READ ID and MULTIPLE I/O Read ID Commands .......................................................................... 40 Figure 14: READ Command ........................................................................................................................... 47 Figure 15: FAST READ Command ................................................................................................................... 47 Figure 16: DUAL OUTPUT FAST READ Command .......................................................................................... 48 Figure 17: DUAL INPUT/OUTPUT FAST READ Command .............................................................................. 48 Figure 18: QUAD OUTPUT FAST READ Command ......................................................................................... 49 Figure 19: QUAD INPUT/OUTPUT FAST READ Command ............................................................................. 49 Figure 20: FAST READ Command - DTR ......................................................................................................... 51 Figure 21: DUAL OUTPUT FAST READ Command - DTR ................................................................................ 52 Figure 22: DUAL INPUT/OUTPUT FAST READ Command - DTR .................................................................... 52 Figure 23: QUAD OUTPUT FAST READ Command - DTR ............................................................................... 53 Figure 24: QUAD INPUT/OUTPUT FAST READ Command - DTR ................................................................... 53 Figure 25: PAGE PROGRAM Command .......................................................................................................... 56 Figure 26: DUAL INPUT FAST PROGRAM Command ...................................................................................... 57 Figure 27: EXTENDED DUAL INPUT FAST PROGRAM Command ................................................................... 57 Figure 28: QUAD INPUT FAST PROGRAM Command ..................................................................................... 58 Figure 29: EXTENDED QUAD INPUT FAST PROGRAM Command ................................................................... 59 Figure 30: WRITE ENABLE and WRITE DISABLE Command Sequence ............................................................ 61 Figure 31: SUBSECTOR and SECTOR ERASE Command .................................................................................. 63 Figure 32: DIE ERASE Command ................................................................................................................... 64 Figure 33: RESET ENABLE and RESET MEMORY Command ........................................................................... 67 Figure 34: READ OTP Command .................................................................................................................... 68 Figure 35: PROGRAM OTP Command ............................................................................................................ 69 Figure 36: XIP Mode Directly After Power-On .................................................................................................. 72 Figure 37: Power-Up Timing .......................................................................................................................... 74 Figure 38: Reset AC Timing During PROGRAM or ERASE Cycle ........................................................................ 77 Figure 39: Reset Enable ................................................................................................................................. 77 Figure 40: Serial Input Timing ........................................................................................................................ 77 Figure 41: Hold Timing .................................................................................................................................. 78 Figure 42: Output Timing .............................................................................................................................. 78 Figure 43: V PPH Timing .................................................................................................................................. 79 Figure 44: AC Timing Input/Output Reference Levels ...................................................................................... 81 Figure 45: L-PBGA-24b05/6mm x 8mm .......................................................................................................... 85 Figure 46: SOP2-16/300 mils .......................................................................................................................... 86 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 4 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Features List of Tables Table 1: Signal Descriptions ........................................................................................................................... Table 2: Sectors[2047:0] ................................................................................................................................. Table 3: Data Protection Using Device Protocols ............................................................................................. Table 4: Memory Sector Protection Truth Table .............................................................................................. Table 5: Protected Area Sizes - Upper Area ..................................................................................................... Table 6: Protected Area Sizes - Lower Area ...................................................................................................... Table 7: SPI Modes ........................................................................................................................................ Table 8: Extended, Dual, and Quad SPI Protocols ............................................................................................ Table 9: Status Register Bit Definitions ........................................................................................................... Table 10: Nonvolatile Configuration Register Bit Definitions ........................................................................... Table 11: Volatile Configuration Register Bit Definitions .................................................................................. Table 12: Sequence of Bytes During Wrap ....................................................................................................... Table 13: Supported Clock Frequencies - STR ................................................................................................. Table 14: Supported Clock Frequencies - DTR ................................................................................................ Table 15: Extended Address Register Bit Definitions ........................................................................................ Table 16: Enhanced Volatile Configuration Register Bit Definitions .................................................................. Table 17: Flag Status Register Bit Definitions .................................................................................................. Table 18: Command Set ................................................................................................................................. Table 19: Lock Register .................................................................................................................................. Table 20: Data/Address Lines for READ ID and MULTIPLE I/O READ ID Commands ....................................... Table 21: Read ID Data Out ............................................................................................................................ Table 22: Extended Device ID, First Byte ......................................................................................................... Table 23: Serial Flash Discovery Parameter Data Structure .............................................................................. Table 24: Parameter ID .................................................................................................................................. Table 25: Command/Address/Data Lines for READ MEMORY Commands ....................................................... Table 26: Command/Address/Data Lines for READ MEMORY Commands - 4-Byte Address ............................. Table 27: Data/Address Lines for PROGRAM Commands ................................................................................ Table 28: Suspend Parameters ....................................................................................................................... Table 29: Operations Allowed/Disallowed During Device States ...................................................................... Table 30: Reset Command Set ........................................................................................................................ Table 31: OTP Control Byte (Byte 64) .............................................................................................................. Table 32: XIP Confirmation Bit ....................................................................................................................... Table 33: Effects of Running XIP in Different Protocols .................................................................................... Table 34: Power-Up Timing and V WI Threshold ............................................................................................... Table 35: AC RESET Conditions ...................................................................................................................... Table 36: Absolute Ratings ............................................................................................................................. Table 37: Operating Conditions ...................................................................................................................... Table 38: Input/Output Capacitance .............................................................................................................. Table 39: AC Timing Input/Output Conditions ............................................................................................... Table 40: DC Current Characteristics and Operating Conditions ...................................................................... Table 41: DC Voltage Characteristics and Operating Conditions ...................................................................... Table 42: AC Characteristics and Operating Conditions ................................................................................... Table 43: Part Number Information ................................................................................................................ Table 44: Package Details ............................................................................................................................... 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 5 10 13 14 14 15 15 17 19 21 22 23 24 24 24 26 26 27 29 37 39 39 39 41 41 44 45 55 65 65 67 69 72 72 75 76 80 80 80 81 82 82 83 87 88 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Important Notes and Warnings Important Notes and Warnings Micron Technology, Inc. ("Micron") reserves the right to make changes to information published in this document, including without limitation specifications and product descriptions. This document supersedes and replaces all information supplied prior to the publication hereof. You may not rely on any information set forth in this document if you obtain the product described herein from any unauthorized distributor or other source not authorized by Micron. Automotive Applications. Products are not designed or intended for use in automotive applications unless specifically designated by Micron as automotive-grade by their respective data sheets. Distributor and customer/distributor shall assume the sole risk and liability for and shall indemnify and hold Micron harmless against all claims, costs, damages, and expenses and reasonable attorneys' fees arising out of, directly or indirectly, any claim of product liability, personal injury, death, or property damage resulting directly or indirectly from any use of nonautomotive-grade products in automotive applications. Customer/distributor shall ensure that the terms and conditions of sale between customer/distributor and any customer of distributor/customer (1) state that Micron products are not designed or intended for use in automotive applications unless specifically designated by Micron as automotive-grade by their respective data sheets and (2) require such customer of distributor/customer to indemnify and hold Micron harmless against all claims, costs, damages, and expenses and reasonable attorneys' fees arising out of, directly or indirectly, any claim of product liability, personal injury, death, or property damage resulting from any use of non-automotive-grade products in automotive applications. Critical Applications. Products are not authorized for use in applications in which failure of the Micron component could result, directly or indirectly in death, personal injury, or severe property or environmental damage ("Critical Applications"). Customer must protect against death, personal injury, and severe property and environmental damage by incorporating safety design measures into customer's applications to ensure that failure of the Micron component will not result in such harms. Should customer or distributor purchase, use, or sell any Micron component for any critical application, customer and distributor shall indemnify and hold harmless Micron and its subsidiaries, subcontractors, and affiliates and the directors, officers, and employees of each against all claims, costs, damages, and expenses and reasonable attorneys' fees arising out of, directly or indirectly, any claim of product liability, personal injury, or death arising in any way out of such critical application, whether or not Micron or its subsidiaries, subcontractors, or affiliates were negligent in the design, manufacture, or warning of the Micron product. Customer Responsibility. Customers are responsible for the design, manufacture, and operation of their systems, applications, and products using Micron products. ALL SEMICONDUCTOR PRODUCTS HAVE INHERENT FAILURE RATES AND LIMITED USEFUL LIVES. IT IS THE CUSTOMER'S SOLE RESPONSIBILITY TO DETERMINE WHETHER THE MICRON PRODUCT IS SUITABLE AND FIT FOR THE CUSTOMER'S SYSTEM, APPLICATION, OR PRODUCT. Customers must ensure that adequate design, manufacturing, and operating safeguards are included in customer's applications and products to eliminate the risk that personal injury, death, or severe property or environmental damages will result from failure of any semiconductor component. Limited Warranty. In no event shall Micron be liable for any indirect, incidental, punitive, special or consequential damages (including without limitation lost profits, lost savings, business interruption, costs related to the removal or replacement of any products or rework charges) whether or not such damages are based on tort, warranty, breach of contract or other legal theory, unless explicitly stated in a written agreement executed by Micron's duly authorized representative. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 6 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Device Description Device Description N25Q is a high-performance multiple input/output serial Flash memory device manufactured on 65nm NOR technology. It features execute-in-place (XIP) functionality, advanced write protection mechanisms, and a high-speed SPI-compatible bus interface. Innovative, high-performance, dual and quad input/output instructions enable double or quadruple the transfer bandwidth for READ and PROGRAM operations. Features The 1Gb N25Q is a stacked device that contains four 256Mb die. From a user standpoint this stacked device behaves as a monolithic device, except with regard to READ MEMORY and ERASE operations and status polling. The device contains a single chip select (S#). The memory is organized as 2048 (64KB) main sectors that are further divided into 16 subsectors each (32,768 subsectors in total). The memory can be erased one 4KB subsector at a time, 64KB sectors at a time, or single die (256Mb) at a time. The memory can be write protected by software through volatile and nonvolatile protection features, depending on the application needs. The protection granularity is of 64KB (sector granularity) for volatile protections The device has 64 one-time programmable (OTP) bytes that can be read and programmed with the READ OTP and PROGRAM OTP commands. These 64 bytes can also be permanently locked with a PROGRAM OTP command. The device also has the ability to pause and resume PROGRAM and ERASE cycles by using dedicated PROGRAM/ERASE SUSPEND and RESUME instructions. 3-Byte Address and 4-Byte Address Modes The device features 3-byte or 4-byte address modes to access memory beyond 128Mb. When 4-byte address mode is enabled, all commands requiring an address must be entered and exited with a 4-byte address mode command: ENTER 4-BYTE ADDRESS MODE command and EXIT 4-BYTE ADDRESS MODE command. The 4-byte address mode can also be enabled through the nonvolatile configuration register. See Registers for more information. Operating Protocols The memory can be operated with three different protocols: * Extended SPI (standard SPI protocol upgraded with dual and quad operations) * Dual I/O SPI * Quad I/O SPI The standard SPI protocol is extended and enhanced by dual and quad operations. In addition, the dual SPI and quad SPI protocols improve the data access time and throughput of a single I/O device by transmitting commands, addresses, and data across two or four data lines. Each protocol contains unique commands to perform READ operations in DTR mode. This enables high data throughput while running at lower clock frequencies. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 7 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Device Description XIP Mode XIP mode requires only an address (no instruction) to output data, improving random access time and eliminating the need to shadow code onto RAM for fast execution. All protocols support XIP operation. For flexibility, multiple XIP entry and exit methods are available. For applications that must enter XIP mode immediately after power-up, nonvolatile configuration register bit settings can enable XIP as the default mode. Device Configurability The N25Q family offers additional features that are configured through the nonvolatile configuration register for default and/or nonvolatile settings. Volatile settings can be configured through the volatile and volatile-enhanced configuration registers. These configurable features include the following: * * * * * * Number of dummy cycles for the fast READ commands Output buffer impedance SPI protocol types (extended SPI, DIO-SPI, or QIO-SPI) Required XIP mode Enabling/disabling HOLD (RESET function) Enabling/disabling wrap mode Figure 1: Logic Diagram VCC NOR die 4 NOR die 3 NOR die 2 DQ0 DQ1 C S# NOR die 1 VPP/W#/DQ2 HOLD#/DQ3 VSS Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Reset functionality is available in devices with a dedicated part number. See Part Number Ordering Information for more details. 8 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Signal Assignments Signal Assignments Figure 2: 24-Ball LBGA (Balls Down) 1 2 3 4 5 NC NC NC NC NC C VSS VCC NC NC S# NC W#/VPP/DQ2 NC NC DQ1 DQ0 HOLD#/DQ3 NC NC NC A B C D E Note: NC NC NC 1. See Part Number Ordering Information for complete package names and details. Figure 3: 16-Pin, Plastic Small Outline -- SO16 (Top View) Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN HOLD#/DQ3 1 16 C VCC 2 15 DQ0 DNU 3 14 DNU DNU 4 13 DNU DNU 5 12 DNU DNU 6 11 DNU S# 7 10 DQ1 8 9 VSS W#/VPP /DQ2 1. Reset functionality is available in devices with a dedicated part number. See Part Number Ordering Information for complete package names and details. 9 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Signal Descriptions Signal Descriptions The signal description table below is a comprehensive list of signals for the N25 family devices. All signals listed may not be supported on this device. See Signal Assignments for information specific to this device. Table 1: Signal Descriptions Symbol Type Description C Input Clock: Provides the timing of the serial interface. Commands, addresses, or data present at serial data inputs are latched on the rising edge of the clock. Data is shifted out on the falling edge of the clock. S# Input Chip select: When S# is HIGH, the device is deselected and DQ1 is at High-Z. When in extended SPI mode, with the device deselected, DQ1 is tri-stated. Unless an internal PROGRAM, ERASE, or WRITE STATUS REGISTER cycle is in progress, the device enters standby power mode (not deep power-down mode). Driving S# LOW enables the device, placing it in the active power mode. After power-up, a falling edge on S# is required prior to the start of any command. DQ0 Input and I/O Serial data: Transfers data serially into the device. It receives command codes, addresses, and the data to be programmed. Values are latched on the rising edge of the clock. DQ0 is used for input/output during the following operations: DUAL OUTPUT FAST READ, QUAD OUTPUT FAST READ, DUAL INPUT/OUTPUT FAST READ, and QUAD INPUT/OUTPUT FAST READ. When used for output, data is shifted out on the falling edge of the clock. In DIO-SPI, DQ0 always acts as an input/output. In QIO-SPI, DQ0 always acts as an input/output, with the exception of the PROGRAM or ERASE cycle performed with VPP. The device temporarily enters the extended SPI protocol and then returns to QIO-SPI as soon as VPP goes LOW. DQ1 Output and I/O Serial data:Transfers data serially out of the device. Data is shifted out on the falling edge of the clock. DQ1 is used for input/output during the following operations: DUAL INPUT FAST PROGRAM, QUAD INPUT FAST PROGRAM, DUAL INPUT EXTENDED FAST PROGRAM, and QUAD INPUT EXTENDED FAST PROGRAM. When used for input, data is latched on the rising edge of the clock. In DIO-SPI, DQ1 always acts as an input/output. In QIO-SPI, DQ1 always acts as an input/output, with the exception of the PROGRAM or ERASE cycle performed with the enhanced program supply voltage (VPP). In this case the device temporarily enters the extended SPI protocol and then returns to QIO-SPI as soon as VPP goes LOW. DQ2 Input and I/O DQ2: When in QIO-SPI mode or in extended SPI mode using QUAD FAST READ commands, the signal functions as DQ2, providing input/output. All data input drivers are always enabled except when used as an output. Micron recommends customers drive the data signals normally (to avoid unnecessary switching current) and float the signals before the memory device drives data on them. DQ3 Input and I/O DQ3: When in quad SPI mode or in extended SPI mode using quad FAST READ commands, the signal functions as DQ3, providing input/output. HOLD# is disabled and RESET# is disabled if the device is selected. RESET# Control Input RESET: This is a hardware RESET# signal. When RESET# is driven HIGH, the memory is in the normal operating mode. When RESET# is driven LOW, the memory enters reset mode and output is High-Z. If RESET# is driven LOW while an internal WRITE, PROGRAM, or ERASE operation is in progress, data may be lost. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 10 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Signal Descriptions Table 1: Signal Descriptions (Continued) Symbol Type HOLD# Control Input HOLD: Pauses any serial communications with the device without deselecting the device. DQ1 (output) is High-Z. DQ0 (input) and the clock are "Don't Care." To enable HOLD, the device must be selected with S# driven LOW. HOLD# is used for input/output during the following operations: QUAD OUTPUT FAST READ, QUAD INPUT/OUTPUT FAST READ, QUAD INPUT FAST PROGRAM, and QUAD INPUT EXTENDED FAST PROGRAM. In QIO-SPI, HOLD# acts as an I/O (DQ3 functionality), and the HOLD# functionality is disabled when the device is selected. When the device is deselected (S# is HIGH) in parts with RESET# functionality, it is possible to reset the device unless this functionality is not disabled by means of dedicated registers bits. The HOLD# functionality can be disabled using bit 4 of the NVCR or bit 4 of the VECR. On devices that include DTR mode capability, the HOLD# functionality is disabled as soon as a DTR operation is recognized. W# Control Input Write protect: W# can be used as a protection control input or in QIO-SPI operations. When in extended SPI with single or dual commands, the WRITE PROTECT function is selectable by the voltage range applied to the signal. If voltage range is low (0V to VCC), the signal acts as a write protection control input. The memory size protected against PROGRAM or ERASE operations is locked as specified in the status register block protect bits 3:0. W# is used as an input/output (DQ2 functionality) during QUAD INPUT FAST READ and QUAD INPUT/OUTPUT FAST READ operations and in QIO-SPI. VPP Power Supply voltage: If VPP is in the voltage range of VPPH, the signal acts as an additional power supply, as defined in the AC Measurement Conditions table. During QIFP, QIEFP, and QIO-SPI PROGRAM/ERASE operations, it is possible to use the additional VPP power supply to speed up internal operations. However, to enable this functionality, it is necessary to set bit 3 of the VECR to 0. In this case, VPP is used as an I/O until the end of the operation. After the last input data is shifted in, the application should apply VPP voltage to VPP within 200ms to speed up the internal operations. If the VPP voltage is not applied within 200ms, the PROGRAM/ERASE operations start at standard speed. The default value of VECR bit 3 is 1, and the VPP functionality for quad I/O modify operations is disabled. VCC Power Device core power supply: Source voltage. VSS Ground DNU - Do not use. NC - No connect. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Description Ground: Reference for the VCC supply voltage. 11 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Memory Organization Memory Organization Memory Configuration and Block Diagram The memory is a stacked device comprised of four 256Mb chips. Each chip is internally partitioned into two 128Mb segments. Each page of memory can be individually programmed. Bits are programmed from one through zero. The device is subsector, sector, or single 256Mb chip erasable, but not page-erasable. Bits are erased from zero through one. The memory is configured as 134,217,728 bytes (8 bits each); 2048 sectors (64KB each); 32,768 subsectors (4KB each); and 524,288 pages (256 bytes each); and 64 OTP bytes are located outside the main memory array. Figure 4: Block Diagram HOLD# W#/VPP High voltage generator Control logic 64 OTP bytes S# C DQ0 DQ1 DQ2 DQ3 I/O shift register Address register and counter 256 byte data buffer Status register Y decoder 07FFFFFFh 0000000h 00000FFh 256 bytes (page size) X decoder 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 12 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Memory Map - 1Gb Density Memory Map - 1Gb Density Table 2: Sectors[2047:0] Address Range Sector Subsector Start End 2047 32767 07FFF000h 07FFFFFFh 32750 07FF0000h 07FF0FFFh 1023 16383 03FF F000h 03FF FFFFh 16368 03FF 0000h 03FF 0FFFh 511 8191 01FF F000h 01FF FFFFh 8176 01FF 0000h 01FF 0FFFh 255 4095 00FF F000h 00FF FFFFh 4080 00FF 0000h 00FF 0FFFh 127 2047 007F F000h 007F FFFFh 2032 007F 0000h 007F 0FFFh 63 1023 003F F000h 003F FFFFh 1008 003F 0000h 003F 0FFFh 0 15 0000 F000h 0000 FFFFh 0 0000 0000h 0000 0FFFh 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 13 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Device Protection Device Protection Table 3: Data Protection Using Device Protocols Note 1 applies to the entire table Protection by: Description Power-on reset and internal timer Protects the device against inadvertent data changes while the power supply is outside the operating specification. Command execution check Ensures that the number of clock pulses is a multiple of one byte before executing a PROGRAM or ERASE command, or any command that writes to the device registers. WRITE ENABLE operation Ensures that commands modifying device data must be preceded by a WRITE ENABLE command, which sets the write enable latch bit in the status register. Note: 1. Extended, dual, and quad SPI protocol functionality ensures that device data is protected from excessive noise. Table 4: Memory Sector Protection Truth Table Note 1 applies to the entire table Sector Lock Register Sector Lock Down Bit Sector Write Lock Bit 0 0 Sector unprotected from PROGRAM and ERASE operations. Protection status reversible. 0 1 Sector protected from PROGRAM and ERASE operations. Protection status reversible. 1 0 Sector unprotected from PROGRAM and ERASE operations. Protection status not reversible except by power cycle or reset. 1 1 Sector protected from PROGRAM and ERASE operations. Protection status not reversible except by power cycle or reset. Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Memory Sector Protection Status 1. Sector lock register bits are written to when the WRITE TO LOCK REGISTER command is executed. The command will not execute unless the sector lock down bit is cleared (see the WRITE TO LOCK REGISTER command). 14 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Device Protection Table 5: Protected Area Sizes - Upper Area Note 1 applies to the entire table Status Register Content Memory Content Top/ Bottom Bit BP3 BP2 BP1 BP0 Protected Area Unprotected Area 0 0 0 0 0 None All sectors 0 0 0 0 1 Sector 2047 Sectors (0 to 2046) 0 0 0 1 0 Sectors (2046 to 2047) Sectors (0 to 2045) 0 0 0 1 1 Sectors (2044 to 2047) Sectors (0 to 2043) 0 0 1 0 0 Sectors (2040 to 2047) Sectors (0 to 2039) 0 0 1 0 1 Sectors (2032 to 2047) Sectors (0 to 2031) 0 0 1 1 0 Sectors (2016 to 2047) Sectors (0 to 2015) 0 0 1 1 1 Sectors (1984 to 2047) Sectors (0 to 1983) 0 1 0 0 0 Sectors (1920 to 2047) Sectors (0 to 1919) 0 1 0 0 1 Sectors (1792 to 2047) Sectors (0 to 1791) 0 1 0 1 0 Sectors (1536 to 2047) Sectors (0 to 1535) 0 1 0 1 1 Sectors (1024 to 2047) Sectors (0 to 1023) 0 1 1 0 0 All sectors None 0 1 1 0 1 All sectors None 0 1 1 1 0 All sectors None 0 1 1 1 1 All sectors None Note: 1. See the Status Register for details on the top/bottom bit and the BP 3:0 bits. Table 6: Protected Area Sizes - Lower Area Note 1 applies to the entire table Status Register Content Memory Content Top/ Bottom Bit BP3 BP2 BP1 BP0 Protected Area Unprotected Area 1 0 0 0 0 None All sectors 1 0 0 0 1 Sector 0 Sectors (1 to 2047) 1 0 0 1 0 Sectors (0 to 1) Sectors (2 to 2047) 1 0 0 1 1 Sectors (0 to 3) Sectors (4 to 2047) 1 0 1 0 0 Sectors (0 to 7) Sectors (8 to 2047) 1 0 1 0 1 Sectors (0 to 15) Sectors (16 to 2047) 1 0 1 1 0 Sectors (0 to 31) Sectors (32 to 2047) 1 0 1 1 1 Sectors (0 to 63) Sectors (64 to 2047) 1 1 0 0 0 Sectors (0 to 127) Sectors (128 to 2047) 1 1 0 0 1 Sectors (0 to 255) Sectors (256 to 2047) 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 15 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Device Protection Table 6: Protected Area Sizes - Lower Area (Continued) Note 1 applies to the entire table Status Register Content Memory Content Top/ Bottom Bit BP3 BP2 BP1 BP0 Protected Area Unprotected Area 1 1 0 1 0 Sectors (0 to 511) Sectors (512 to 2047) 1 1 0 1 1 Sectors (0 to 1023) Sectors (1024 to 2047) 1 1 1 0 0 All sectors None 1 1 1 0 1 All sectors None 1 1 1 1 0 All sectors None 1 1 1 1 1 All sectors None Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. See the Status Register for details on the top/bottom bit and the BP 3:0 bits. 16 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Serial Peripheral Interface Modes Serial Peripheral Interface Modes The device can be driven by a microcontroller while its serial peripheral interface is in either of the two modes shown here. The difference between the two modes is the clock polarity when the bus master is in standby mode and not transferring data. Input data is latched in on the rising edge of the clock, and output data is available from the falling edge of the clock. Table 7: SPI Modes Note: Note 1 applies to the entire table SPI Modes Clock Polarity CPOL = 0, CPHA = 0 C remains at 0 for (CPOL = 0, CPHA = 0) CPOL = 1, CPHA = 1 C remains at 1 for (CPOL = 1, CPHA = 1) 1. The listed SPI modes are supported in extended, dual, and quad SPI protocols. Shown below is an example of three memory devices in extended SPI protocol in a simple connection to an MCU on an SPI bus. Because only one device is selected at a time, that one device drives DQ1, while the other devices are High-Z. Resistors ensure the device is not selected if the bus master leaves S# High-Z. The bus master might enter a state in which all input/output is High-Z simultaneously, such as when the bus master is reset. Therefore, the serial clock must be connected to an external pull-down resistor so that S# is pulled HIGH while the serial clock is pulled LOW. This ensures that S# and the serial clock are not HIGH simultaneously and that tSHCH is met. The typical resistor value of 100k, assuming that the time constant R x Cp (Cp = parasitic capacitance of the bus line), is shorter than the time the bus master leaves the SPI bus in High-Z. Example: Cp = 50pF, that is R x Cp = 5s. The application must ensure that the bus master never leaves the SPI bus High-Z for a time period shorter than 5s. W# and HOLD# should be driven either HIGH or LOW, as appropriate. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 17 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Serial Peripheral Interface Modes Figure 5: Bus Master and Memory Devices on the SPI Bus VSS VCC R SDO SPI interface: (CPOL, CPHA) = (0, 0) or (1, 1) SDI SCK VCC C SPI bus master DQ1 DQ0 R CS3 SPI memory device VCC C VSS R DQ1 DQ0 SPI memory device VCC C VSS R DQ1 DQ0 VSS SPI memory device CS2 CS1 S# W# HOLD# S# W# HOLD# S# W# HOLD# Figure 6: SPI Modes CPOL CPHA 0 0 C 1 1 C DQ0 MSB DQ1 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN MSB 18 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory SPI Protocols SPI Protocols Table 8: Extended, Dual, and Quad SPI Protocols Protocol Name Command Input Extended DQ0 Multiple DQn lines, depending on the command Dual DQ[1:0] DQ[1:0] Address Input Data Input/Output Description Multiple DQn Device default protocol from the factory. Additional comlines, depending mands extend the standard SPI protocol and enable address on the command or data transmission on multiple DQn lines. DQ[1:0] Volatile selectable: When the enhanced volatile configuration register bit 6 is set to 0 and bit 7 is set to 1, the device enters the dual SPI protocol immediately after the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The device returns to the default protocol after the next power-on. In addition, the device can return to default protocol using the rescue sequence or through new WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command, without power-off or power-on. Nonvolatile selectable: When nonvolatile configuration register bit 2 is set, the device enters the dual SPI protocol after the next power-on. Once this register bit is set, the device defaults to the dual SPI protocol after all subsequent power-on sequences until the nonvolatile configuration register bit is reset to 1. Quad1 DQ[3:0] DQ[3:0] DQ[3:0] Volatile selectable: When the enhanced volatile configuration register bit 7 is set to 0, the device enters the quad SPI protocol immediately after the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The device returns to the default protocol after the next power-on. In addition, the device can return to default protocol using the rescue sequence or through new WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command, without poweroff or power-on. Nonvolatile selectable: When nonvolatile configuration register bit 3 is set to 0, the device enters the quad SPI protocol after the next power-on. Once this register bit is set, the device defaults to the quad SPI protocol after all subsequent power-on sequences until the nonvolatile configuration register bit is reset to 1. Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. In quad SPI protocol, all command/address input and data I/O are transmitted on four lines except during a PROGRAM and ERASE cycle performed with VPP. In this case, the device enters the extended SPI protocol to temporarily allow the application to perform a PROGRAM/ERASE SUSPEND operation or to check the write-in-progress bit in the status register or the program/erase controller bit in the flag status register. Then, when VPP goes LOW, the device returns to the quad SPI protocol. 19 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Nonvolatile and Volatile Registers The device features the following volatile and nonvolatile registers that users can access to store device parameters and operating configurations: * * * * * * Status register Nonvolatile and volatile configuration registers Extended address register Enhanced volatile configuration register Flag status register Lock register Note: The lock register is defined in READ LOCK REGISTER Command. The working condition of memory is set by an internal configuration register that is not directly accessible to users. As shown below, parameters in the internal configuration register are loaded from the nonvolatile configuration register during each device boot phase or power-on reset. In this sense, then, the nonvolatile configuration register contains the default settings of memory. Also, during the life of an application, each time a WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER command executes to set configuration parameters in these respective registers, these new settings are copied to the internal configuration register. Therefore, memory settings can be changed in real time. However, at the next power-on reset, the memory boots according to the memory settings defined in the nonvolatile configuration register parameters. Figure 7: Internal Configuration Register Nonvolatile configuration register Register download is executed only during the power-on phase or after a reset, overwriting configuration register settings on the internal configuration register. Volatile configuration register and enhanced volatile configuration register Internal configuration register Register download is executed after a WRITE VOLATILE OR ENHANCED VOLATILE CONFIGURATION REGISTER command, overwriting configuration register settings on the internal configuration register. Device behavior 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 20 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Status Register Table 9: Status Register Bit Definitions Note 1 applies to entire table Bit Name Settings Description Notes 7 Status register 0 = Enabled write enable/disable 1 = Disabled Nonvolatile bit: Used with the W# signal to enable or disable writing to the status register. 3 5 Top/bottom 0 = Top 1 = Bottom Nonvolatile bit: Determines whether the protected memory area defined by the block protect bits starts from the top or bottom of the memory array. 4 6, 4:2 Block protect 3-0 See Protected Area Sizes - Upper Area and Lower Area tables in Device Protection Nonvolatile bit: Defines memory to be software protected against PROGRAM or ERASE operations. When one or more block protect bits is set to 1, a designated memory area is protected from PROGRAM and ERASE operations. 4 1 Write enable latch 0 = Cleared (Default) Volatile bit: The device always powers up with this bit 1 = Set cleared to prevent inadvertent WRITE STATUS REGISTER, PROGRAM, or ERASE operations. To enable these operations, the WRITE ENABLE operation must be executed first to set this bit. 0 Write in progress 0 = Ready 1 = Busy Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Volatile bit: Indicates if one of the following command cycles is in progress: WRITE STATUS REGISTER WRITE NONVOLATILE CONFIGURATION REGISTER PROGRAM ERASE 2, 5 2, 6 1. Bits can be read from or written to using READ STATUS REGISTER or WRITE STATUS REGISTER commands, respectively. 2. Volatile bits are cleared to 0 by a power cycle or reset. 3. The status register write enable/disable bit, combined with the W#/VPP signal as described in the Signal Descriptions, provides hardware data protection for the device as follows: When the enable/disable bit is set to 1, and the W#/VPP signal is driven LOW, the status register nonvolatile bits become read-only and the WRITE STATUS REGISTER operation will not execute. The only way to exit this hardware-protected mode is to drive W#/VPP HIGH. 4. See Protected Area Sizes tables. The DIE ERASE command is executed only if all bits are 0. 5. In case of protection error this volatile bit is set and can be reset only by means of a CLEAR FLAG STATUS REGISTER command. 6. Program or erase controller bit = NOT (write in progress bit). 21 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Nonvolatile and Volatile Configuration Registers Table 10: Nonvolatile Configuration Register Bit Definitions Note 1 applies to entire table Bit Name Settings Description Notes 15:12 Number of dummy clock cycles 0000 (identical to 1111) 0001 0010 . . 1101 1110 1111 Sets the number of dummy clock cycles subsequent to all FAST READ commands. The default setting targets the maximum allowed frequency and guarantees backward compatibility. 11:9 XIP mode at power-on reset 000 = XIP: Fast Read 001 = XIP: Dual Output Fast Read 010 = XIP: Dual I/O Fast Read 011 = XIP: Quad Output Fast Read 100 = XIP: Quad I/O Fast Read 101 = Reserved 110 = Reserved 111 = Disabled (Default) Enables the device to operate in the selected XIP mode immediately after power-on reset. 8:6 Output driver 000 = Reserved strength 001 = 90 Ohms 010 = 60 Ohms 011 = 45 Ohms 100 = Reserved 101 = 20 Ohms 110 = 15 Ohms 111 = 30 (Default) Optimizes impedance at VCC/2 output voltage. 5 Reserved X "Don't Care." 4 Reset/hold 0 = Disabled 1 = Enabled (Default) Enables or disables hold or reset. (Available on dedicated part numbers.) 3 Quad I/O pro- 0 = Enabled Enables or disables quad I/O protocol. tocol 1 = Disabled (Default, Extended SPI protcocol) 4 2 Dual I/O protocol 0 = Enabled 1 = Disabled (Default, Extended SPI protocol) Enables or disables dual I/O protocol. 4 1 128Mb segment select 0 = Upper 128Mb segment 1 = Lower 128Mb segment (Default) Selects a 128Mb segment as default for 3B address operations. See also the extended address register. 0 Address bytes 0 = Enable 4B address 1 = Enable 3B address (Default) Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 2, 3 Defines the number of address bytes for a command. 1. Settings determine device memory configuration after power-on. The device ships from the factory with all bits erased to 1 (FFFFh). The register is read from or written to by READ NONVOLATILE CONFIGURATION REGISTER or WRITE NONVOLATILE CONFIGURATION REGISTER commands, respectively. 22 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers 2. The 0000 and 1111 settings are identical in that they both define the default state, which is the maximum frequency of fc = 108 MHz. This ensures backward compatibility. 3. If the number of dummy clock cycles is insufficient for the operating frequency, the memory reads wrong data. The number of cycles must be set according to and sufficient for the clock frequency, which varies by the type of FAST READ command, as shown in the Supported Clock Frequencies table. 4. If bits 2 and 3 are both set to 0, the device operates in quad I/O. When bits 2 or 3 are reset to 0, the device operates in dual I/O or quad I/O respectively, after the next poweron. Table 11: Volatile Configuration Register Bit Definitions Note 1 applies to entire table Bit Name Settings 7:4 Description Notes Number of dummy clock cycles 0000 (identical to 1111) 0001 0010 . . 1101 1110 1111 Sets the number of dummy clock cycles subsequent to all FAST READ commands. The default setting targets maximum allowed frequency and guarantees backward compatibility. 3 XIP 0 1 Enables or disables XIP. For device part numbers with feature digit equal to 2 or 4, this bit is always "Don't Care," so the device operates in XIP mode without setting this bit. 2 Reserved x = Default 0b = Fixed value. Wrap 00 = 16-byte boundary aligned 16-byte wrap: Output data wraps within an aligned 16byte boundary starting from the address (3-byte or 4byte) issued after the command code. 01 = 32-byte boundary aligned 32-byte wrap: Output data wraps within an aligned 32byte boundary starting from the address (3-byte or 4byte) issued after the command code. 10 = 64-byte boundary aligned 64-byte wrap: Output data wraps within an aligned 64byte boundary starting from the address (3-byte or 4byte) issued after the command code. 11 = sequential (default) Continuous reading (default): All bytes are read sequentially. 1:0 Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 2, 3 4 1. Settings determine the device memory configuration upon a change of those settings by the WRITE VOLATILE CONFIGURATION REGISTER command. The register is read from or written to by READ VOLATILE CONFIGURATION REGISTER or WRITE VOLATILE CONFIGURATION REGISTER commands respectively. 2. The 0000 and 1111 settings are identical in that they both define the default state, which is the maximum frequency of fc = 108 MHz. This ensures backward compatibility. 3. If the number of dummy clock cycles is insufficient for the operating frequency, the memory reads wrong data. The number of cycles must be set according to and be sufficient for the clock frequency, which varies by the type of FAST READ command, as shown in the Supported Clock Frequencies table. 4. See the Sequence of Bytes During Wrap table. 23 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Table 12: Sequence of Bytes During Wrap Starting Address 16-Byte Wrap 32-Byte Wrap 64-Byte Wrap 0 0-1-2- . . . -15-0-1- . . 0-1-2- . . . -31-0-1- . . 0-1-2- . . . -63-0-1- . . 1 1-2- . . . -15-0-1-2- . . 1-2- . . . -31-0-1-2- . . 1-2- . . . -63-0-1-2- . . 15 15-0-1-2-3- . . . -15-0-1- . . 15-16-17- . . . -31-0-1- . . 15-16-17- . . . -63-0-1- . . 31 31-16-17- . . . -31-16-17- . . 31-0-1-2-3- . . . -31-0-1- . . 31-32-33- . . . -63-0-1- . . 63 63-48-49- . . . -63-48-49- . . 63-32-33- . . . -63-32-33- . . 63-0-1- . . . -63-0-1- . . Table 13: Supported Clock Frequencies - STR Note 1 applies to entire table Number of Dummy Clock Cycles FAST READ DUAL OUTPUT FAST READ DUAL I/O FAST READ QUAD OUTPUT FAST READ QUAD I/O FAST READ 1 90 80 50 43 30 2 100 90 70 60 40 3 108 100 80 75 50 4 108 105 90 90 60 5 108 108 100 100 70 6 108 108 105 105 80 7 108 108 108 108 86 8 108 108 108 108 95 9 108 108 108 108 105 10 108 108 108 108 108 Note: 1. Values are guaranteed by characterization and not 100% tested in production. Table 14: Supported Clock Frequencies - DTR Note 1 applies to entire table Number of Dummy Clock Cycles FAST READ DUAL OUTPUT FAST READ DUAL I/O FAST READ QUAD OUTPUT FAST READ QUAD I/O FAST READ 1 45 40 25 30 15 2 50 45 35 38 20 3 54 50 40 45 25 4 54 53 45 47 30 5 54 54 50 50 35 6 54 54 53 53 40 7 54 54 54 54 43 8 54 54 54 54 48 9 54 54 54 54 53 10 54 54 54 54 54 Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Values are guaranteed by characterization and not 100% tested in production. 24 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Extended Address Register In the case of 3-byte addressability mode, the device includes an extended address register that provides a fourth address byte A[31:24], enabling access to memory beyond 128Mb. The extended address register bits [2:0] are used to select one of the eight 128Mb segments of the memory array. Figure 8: Upper and Lower Memory Array Segments 07FFFFFFh A[26:24] = 111 06FFFFFFh A[26:24] = 110 07000000h 05FFFFFFh A[26:24] = 101 06000000h 04FFFFFFh 05000000h A[26:24] = 100 03FFFFFFh 04000000h A[26:24] = 011 02FFFFFFh A[26:24] = 010 03000000h 01FFFFFFh A[26:24] = 001 02000000h 00FFFFFFh 01000000h A[26:24] = 000 00000000h The PROGRAM and ERASE operations act upon the 128Mb segment selected in the extended address register. The READ operation begins reading in the selected 128Mb segment. It is bound by the 256Mb (die segment) to which the 128Mb segment belongs. In a continuos read, when the last byte of the die segment selected is read, the next byte output is the first byte of the same die segment; therefore, a download of the whole array is not possible with one READ operation. The value of the extended address register does not change when a READ operation crosses the selected 128Mb boundary. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 25 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Table 15: Extended Address Register Bit Definitions Note 1 applies to entire table Bit Name Settings 7 Description A[31:27] 0 = Reserved - A[26:24] 111 = Upper 128Mb segment 110 = Seventh 128Mb segment 101 = Sixth 128Mb segment 100 = Fifth 128Mb segment 011 = Fourth 128Mb segment 010 = Third 128Mb segment 001 = Second 128Mb segment 000 = Lower 128Mb segment (default) Enable selecting 128Mb segmentation. For A[26:24], the default setting is determined by bit 1 of the nonvolatile configuration register. However, this setting can be changed using the WRITE EXTENDED ADDRESS REGISTER command. 6 5 4 3 2 1 0 Note: 1. The extended address register is for an application that supports only 3-byte addressing. It extends the device's first three address bytes A[23:0] to a fourth address byte A[31:24] to enable memory access beyond 128Mb. The extended address register bits [2:0] are used to select one of the eight 128Mb segments of the memory array. If 4-byte addressing is enabled, extended address register settings are ignored. Enhanced Volatile Configuration Register Table 16: Enhanced Volatile Configuration Register Bit Definitions Note 1 applies to entire table Bit Name Description Notes 7 Quad I/O protocol 0 = Enabled Enables or disables quad I/O protocol. 1 = Disabled (Default, extended SPI protocol) 2 6 Dual I/O protocol 0 = Enabled Enables or disables dual I/O protocol. 1 = Disabled (Default, extended SPI protocol) 2 5 Reserved x = Default 0b = Fixed value. 4 Reset/hold 0 = Disabled 1 = Enabled (Default) Enables or disables hold or reset. (Available on dedicated part numbers.) 3 VPP accelerator 0 = Enabled 1 = Disabled (Default) Enables or disables VPP acceleration for QUAD INPUT FAST PROGRAM and QUAD INPUT EXTENDED FAST PROGRAM OPERATIONS. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Settings 26 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Table 16: Enhanced Volatile Configuration Register Bit Definitions (Continued) Note 1 applies to entire table Bit Name 2:0 Settings Output driver strength 000 = Reserved 001 = 90 Ohms 010 = 60 Ohms 011 = 45 Ohms 100 = Reserved 101 = 20 Ohms 110 = 15 Ohms 111 = 30 (Default) Notes: Description Notes Optimizes impedance at VCC/2 output voltage. 1. Settings determine the device memory configuration upon a change of those settings by the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. The register is read from or written to in all protocols by READ ENHANCED VOLATILE CONFIGURATION REGISTER or WRITE ENHANCED VOLATILE CONFIGURATION REGISTER commands, respectively. 2. If bits 6 and 7 are both set to 0, the device operates in quad I/O. When either bit 6 or 7 is reset to 0, the device operates in dual I/O or quad I/O respectively following the next WRITE ENHANCED VOLATILE CONFIGURATION command. Flag Status Register Table 17: Flag Status Register Bit Definitions Note 1 applies to entire table Bit Name Settings Description Notes 7 Program or erase controller 0 = Busy 1 = Ready Status bit: Indicates whether one of the following command cycles is in progress: WRITE STATUS REGISTER, WRITE NONVOLATILE CONFIGURATION REGISTER, PROGRAM, or ERASE. 6 Erase suspend 0 = Not in effect 1 = In effect Status bit: Indicates whether an ERASE operation has been or is going to be suspended. 5 Erase 0 = Clear 1 = Failure or protection error Error bit: Indicates whether an ERASE operation has succeeded or failed. 3, 4 4 Program 0 = Clear 1 = Failure or protection error Error bit: Indicates whether a PROGRAM operation has succeeded or failed; also an attempt to program a 0 to a 1 when VPP = VPPH and the data pattern is a multiple of 64 bits. 3, 4 3 VPP 0 = Enabled 1 = Disabled (Default) Error bit: Indicates an invalid voltage on VPP during a PROGRAM or ERASE operation. 3, 4 2 Program suspend 0 = Not in effect 1 = In effect Status bit: Indicates whether a PROGRAM operation has been or is going to be suspended. 2 1 Protection 0 = Clear 1 = Failure or protection error Error bit: Indicates whether an ERASE or PROGRAM operation has attempted to modify the protected array sector, or whether a PROGRAM operation has attempted to access the locked OTP space. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 27 2, 5 2 3, 4 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Nonvolatile and Volatile Registers Table 17: Flag Status Register Bit Definitions (Continued) Note 1 applies to entire table Bit Name Settings 0 Addressing 0 = 3 bytes addressing 1 = 4 bytes addressing Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Description Notes Status bit: Indicates whether 3-byte or 4-byte address mode is enabled. 2 1. 2. 3. 4. Register bits are read by READ FLAG STATUS REGISTER command. All bits are volatile. Status bits are reset automatically. Error bits must be cleared through the CLEAR FLAG STATUS REGISTER command. These error flags are "sticky." They must be cleared through the CLEAR STATUS REGISTER command. 5. Program or erase controller bit = NOT (write in progress bit). 28 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Command Definitions Command Definitions Table 18: Command Set Note 1 applies to entire table Code Extended Dual I/O Quad I/O Data Bytes Notes RESET ENABLE 66h Yes Yes Yes 0 2 RESET MEMORY 99h Command RESET Operations IDENTIFICATION Operations READ ID 9E/9Fh Yes No No 1 to 20 2 MULTIPLE I/O READ ID AFh No Yes Yes 1 to 3 2 READ SERIAL FLASH DISCOVERY PARAMETER 5Ah Yes Yes Yes 1 to 3 READ 03h Yes No No 1 to 4 FAST READ 0Bh Yes Yes Yes DUAL OUTPUT FAST READ 3Bh Yes Yes No DUAL INPUT/OUTPUT FAST READ 0Bh 3Bh BBh Yes Yes No QUAD OUTPUT FAST READ 6Bh Yes No Yes QUAD INPUT/OUTPUT FAST READ 0Bh 6Bh EBh Yes No Yes FAST READ - DTR 0Dh Yes Yes Yes 1 to 6 DUAL OUTPUT FAST READ - DTR 3Dh Yes Yes No 1 to 6 DUAL INPUT/OUTPUT FAST READ - DTR 0Dh 3Dh BDh Yes Yes No 1 to 6 QUAD OUTPUT FAST READ - DTR 6Dh Yes No Yes 1 to 6 QUAD INPUT/OUTPUT FAST READ - DTR 0Dh 6Dh EDh Yes No Yes 1 to 7 4-BYTE READ 13h Yes Yes Yes 1 to 8 4-BYTE FAST READ 0Ch 4-BYTE DUAL OUTPUT FAST READ 3Ch Yes Yes No 1 to 4-BYTE DUAL INPUT/OUTPUT FAST READ BCh Yes Yes No 4-BYTE QUAD OUTPUT FAST READ 6Ch Yes No Yes 4-BYTE QUAD INPUT/OUTPUT FAST READ ECh Yes No Yes READ Operations 5 1 to 5 5, 11 1 to 5 5, 12 9 9 9, 11 1 to 9 10, 12 WRITE Operations 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 29 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Command Definitions Table 18: Command Set (Continued) Note 1 applies to entire table Code Extended Dual I/O Quad I/O Data Bytes Notes WRITE ENABLE 06h Yes Yes Yes 0 2 WRITE DISABLE 04h Yes Yes Yes 1 to 2 1 2, 13, 15 Command REGISTER Operations READ STATUS REGISTER 05h WRITE STATUS REGISTER 01h READ LOCK REGISTER E8h WRITE LOCK REGISTER E5h READ FLAG STATUS REGISTER 70h CLEAR FLAG STATUS REGISTER 50h READ NONVOLATILE CONFIGURATION REGISTER B5h WRITE NONVOLATILE CONFIGURATION REGISTER B1h READ VOLATILE CONFIGURATION REGISTER 85h WRITE VOLATILE CONFIGURATION REGISTER 81h READ ENHANCED VOLATILE CONFIGURATION REGISTER 65h WRITE ENHANCED VOLATILE CONFIGURATION REGISTER 61h READ EXTENDED ADDRESS REGISTER C8h WRITE EXTENDED ADDRESS REGISTER C5h Yes Yes Yes 1 to 4 1 4, 13 Yes Yes Yes 1 to 2 0 Yes Yes Yes 2 2 2, 13, 15 Yes Yes Yes Yes Yes Yes Yes Yes Yes 1 to 2 1 2, 13 1 to 2 1 2, 13 0 2 2, 13 PROGRAM Operations PAGE PROGRAM 02h Yes Yes Yes 1 to 256 4, 13, 14 DUAL INPUT FAST PROGRAM A2h Yes Yes No 1 to 256 4, 13, 14 EXTENDED DUAL INPUT FAST PROGRAM 02h A2h D2h Yes Yes No QUAD INPUT FAST PROGRAM 32h Yes No Yes EXTENDED QUAD INPUT FAST PROGRAM 02h 32h 12h Yes No Yes SUBSECTOR ERASE 20h Yes Yes Yes SECTOR ERASE D8h 4, 11, 13, 14 1 to 256 4, 13, 14 4, 12, 13, 14 ERASE Operations DIE ERASE C4h PROGRAM/ERASE RESUME 7Ah PROGRAM/ERASE SUSPEND 75h 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 0 4, 13, 14 4, 13, 14 4, 13, 14 Yes 30 Yes Yes 0 2, 13, 14 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Command Definitions Table 18: Command Set (Continued) Note 1 applies to entire table Command Code Extended Dual I/O Quad I/O Data Bytes Notes Yes Yes Yes 1 to 64 5 ONE-TIME PROGRAMMABLE (OTP) Operations READ OTP ARRAY 4Bh PROGRAM OTP ARRAY 42h 4, 13, 14 4-BYTE ADDRESS MODE Operations ENTER 4-BYTE ADDRESS MODE B7h EXIT 4-BYTE ADDRESS MODE E9h Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Yes Yes Yes 0 2, 13 1. Yes in the protocol columns indicates that the command is supported and has the same functionality and command sequence as other commands marked Yes. 2. Address bytes = 0. Dummy clock cycles = 0. 3. Address bytes = 3. Dummy clock cycles default = 8. 4. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles = 0. 5. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles default = 8. Dummy clock cycles default = 10 (when quad SPI protocol is enabled). Dummy clock cycles are configurable by the user. 6. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles default = 6. Dummy clock cycles default = 8 when quad SPI protocol is enabled. Dummy clock cycles are configurable by the user. 7. Address bytes default = 3; address bytes = 4 (extended address). Dummy clock cycles default = 8. Dummy clock cycles are configurable by the user. 8. Address bytes = 4. Dummy clock cycles = 0. 9. Address bytes = 4. Dummy clock cycles default = 8. Dummy clock cycles default = 10 (when quad SPI protocol is enabled). Dummy clock cycles are configurable by the user. 10. Address bytes = 4. Dummy clock cycles default = 10. Dummy clock cycles is configurable by the user. 11. When the device is in dual SPI protocol, the command can be entered with any of these three codes. The different codes enable compatibility between dual SPI and extended SPI protocols. 12. When the device is in quad SPI protocol, the command can be entered with any of these three codes. The different codes enable compatibility between quad SPI and extended SPI protocols. 13. The WRITE ENABLE command must be issued first before this command can be executed. 14. Requires the READ FLAG STATUS REGISTER command being issued with at least one byte output. (After code, at least 8 clock pulses in extended SPI, 4 clock pulses in dual I/O SPI, and 2 clock pulses in quad I/O SPI.) The cycle is not complete until bit 7 of the flag status register outputs 1. 15. The end of operation can be detected by means of a READ FLAG STATUS REGISTER command being issued four times, S# toggled between each command execution, and bit 7 of the flag status register outputs 1 for all four READ operations. 31 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations READ REGISTER and WRITE REGISTER Operations READ STATUS REGISTER or FLAG STATUS REGISTER Command To initiate a READ STATUS REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, and output on DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output. The status register can be read continuously and at any time, including during a PROGRAM, ERASE, or WRITE operation. The flag status register can be read continuously and at any time, including during an ERASE or WRITE operation. If one of these operations is in progress, checking the write in progress bit or program or erase controller bit is recommended before executing the command. The flag status register must be read any time a PROGRAM, ERASE, or SUSPEND/ RESUME command is issued, or after a RESET command while device is busy. The cycle is not complete until bit 7 of the flag status register outputs 1. Refer to Command Definitions for more information. Note: The end of an operation (such as a power-up, WRITE STATUS REGISTER, or WRITE NONVOLATILE CONFIGURATION REGISTER) is determined by issuing the READ FLAG STATUS REGISTER command once for each die in the device, with S# toggled between commands until each die is ready. Bit 7 of the flag status register outputs a value of 1 each time. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 32 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations Figure 9: READ REGISTER Command Extended 0 7 9 8 10 11 12 13 14 15 C LSB Command DQ0 MSB LSB DOUT High-Z DQ1 DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT MSB Dual 0 3 4 5 6 7 C LSB LSB MSB Quad DOUT DOUT Command DQ[1:0] DOUT DOUT DOUT MSB 0 1 2 3 C LSB Command DQ[3:0] MSB Notes: DOUT LSB DOUT DOUT Don't Care MSB 1. Supports all READ REGISTER commands except READ LOCK REGISTER. 2. A READ NONVOLATILE CONFIGURATION REGISTER operation will output data starting from the least significant byte. READ NONVOLATILE CONFIGURATION REGISTER Command To execute a READ NONVOLATILE CONFIGURATION REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, and output on DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output. The nonvolatile configuration register can be read continuously. After all 16 bits of the register have been read, a 0 is output. All reserved fields output a value of 1. READ VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command To execute a READ VOLATILE CONFIGURATION REGISTER command or a READ ENHANCED VOLATILE CONFIGURATION REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, and output on DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output. When the register is read continuously, the same byte is output repeatedly. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 33 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations READ EXTENDED ADDRESS REGISTER Command To initiate a READ EXTENDED ADDRESS REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, and output on DQ1. For dual SPI protocol, the command code is input on DQ[1:0], and output on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0], and is output on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output. When the register is read continuously, the same byte is output repeatedly. WRITE STATUS REGISTER Command To issue a WRITE STATUS REGISTER command, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. For extended SPI protocol, the command code is input on DQ0, followed by the data bytes. For dual SPI protocol, the command code is input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input on DQ[3:0], followed by the data bytes. When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is tW. This command is used to write new values to status register bits 7:2, enabling software data protection. The status register can also be combined with the W#/V PP signal to provide hardware data protection. The WRITE STATUS REGISTER command has no effect on status register bits 1:0. When the operation is in progress, the program or erase controller bit of the flag status register is set to 0. To obtain the operation status, the flag status register must be polled four times, with S# toggled twice in between commands. When the operation completes, the program or erase controller bit is cleared to 1. The end of operation can be detected when the flag status register outputs the program or erase controller bit to 1 each of the four times. When the maximum time is achieved (see AC Characteristics and Operating Conditions), polling the flag status register four times is not required. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 34 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations Figure 10: WRITE REGISTER Command Extended 0 7 8 9 10 11 12 13 15 14 C LSB LSB DIN Command DQ0 MSB Dual DIN DIN DIN DIN DIN DIN DIN MSB 0 3 4 5 6 7 C LSB MSB Quad LSB DIN Command DQ[1:0] DIN DIN DIN DIN MSB 0 1 2 3 C LSB Command DQ[3:0] MSB Notes: LSB DIN DIN DIN MSB 1. Supports all WRITE REGISTER commands except WRITE LOCK REGISTER. 2. A WRITE NONVOLATILE CONFIGURATION REGISTER operation requires data being sent starting from least significant byte. For this command, the data in consists of two bytes. WRITE NONVOLATILE CONFIGURATION REGISTER Command To execute the WRITE NONVOLATILE CONFIGURATION REGISTER command, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the 16th bit of the last data byte has been latched in, after which it must be driven HIGH. For extended SPI protocol, the command code is input on DQ0, followed by two data bytes. For dual SPI protocol, the command code is input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input on DQ[3:0], followed by the data bytes. When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is tWNVCR. When the operation is in progress, the program or erase controller bit of the flag status register is set to 0. To obtain the operation status, the flag status register must be polled four times, with S# toggled twice in between commands. When the operation completes, the program or erase controller bit is cleared to 1. The end of operation can be detected when the flag status register outputs the program or erase controller bit to 1 each of the four times. When the maximum time is achieved (see AC Characteristics and Operating Conditions), polling the flag status register four times is not required. WRITE VOLATILE or ENHANCED VOLATILE CONFIGURATION REGISTER Command To execute a WRITE VOLATILE CONFIGURATION REGISTER command or a WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. For extended SPI protocol, the command code is input on DQ0, 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 35 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. DIN 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations followed by the data bytes. For dual SPI protocol, the command code is input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input on DQ[3:0], followed by the data bytes. Because register bits are volatile, change to the bits is immediate. After the data is latched in, S# must be driven HIGH. Reserved bits are not affected by this command. WRITE EXTENDED ADDRESS REGISTER Command To initiate a WRITE EXTENDED ADDRESS REGISTER command, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by the data bytes. For dual SPI protocol, the command code is input on DQ[1:0], followed by the data bytes. For quad SPI protocol, the command code is input on DQ[3:0], followed by the data bytes. Because register bits are volatile, change to the bits is immediate. After the data is latched in, S# must be driven HIGH. Reserved bits are not affected by this command. READ LOCK REGISTER Command To execute the READ LOCK REGISTER command, S# is driven LOW. For extended SPI protocol, the command code is input on DQ0, followed by address bytes that point to a location in the sector. For dual SPI protocol, the command code is input on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0]. Each address bit is latched in during the rising edge of the clock. For extended SPI protocol, data is shifted out on DQ1 at a maximum frequency fC during the falling edge of the clock. For dual SPI protocol, data is shifted out on DQ[1:0], and for qual SPI protocol, data is shifted out on DQ[3:0]. The operation is terminated by driving S# HIGH at any time during data output. When the register is read continuously, the same byte is output repeatedly. Any READ LOCK REGISTER command that is executed while an ERASE, PROGRAM, or WRITE cycle is in progress is rejected with no affect on the cycle in progress. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 36 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations Table 19: Lock Register Note 1 applies to entire table Bit Name 7:2 Settings Description Bit values are 0. Reserved 0 1 Write lock down 0 = Cleared (Default) Volatile bit: the device always powers-up with this bit cleared, 1 = Set which means sector lock down and sector write lock bits can be set. When this bit set, neither of the lock register bits can be written to until the next power cycle. 0 Sector write lock 0 = Cleared (Default) Volatile bit: the device always powers-up with this bit cleared, 1 = Set which means that PROGRAM and ERASE operations in this sector can be executed and sector content modified. When this bit is set, PROGRAM and ERASE operations in this sector will not be executed. Note: 1. Sector lock register bits 1:0 are written to by the WRITE LOCK REGISTER command. The command will not execute unless the sector lock down bit is cleared. Figure 11: READ LOCK REGISTER Command Extended 0 7 8 Cx C LSB A[MIN] Command DQ[0] MSB A[MAX] DOUT High-Z DQ1 DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT DOUT DOUT DOUT LSB DOUT DOUT MSB Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] MSB A[MAX] Quad 0 1 MSB 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB Note: A[MAX] LSB DOUT DOUT Don't Care MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + ((A[MAX] + 1)/2). For quad SPI protocol, Cx = 1 + ((A[MAX] + 1)/4). WRITE LOCK REGISTER Command To initiate the WRITE LOCK REGISTER command, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQn, followed by address bytes that point to a 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 37 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ REGISTER and WRITE REGISTER Operations location in the sector, and then one data byte that contains the desired settings for lock register bits 0 and 1. When execution is complete, the write enable latch bit is cleared within tSHSL2 and no error bits are set. Because lock register bits are volatile, change to the bits is immediate. WRITE LOCK REGISTER can be executed when an ERASE SUSPEND operation is in effect. After the data is latched in, S# must be driven HIGH. Figure 12: WRITE LOCK REGISTER Command Extended 0 7 8 Cx C A[MIN] LSB LSB Command DQ0 A[MAX] MSB Dual 0 3 DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN MSB 4 Cx C LSB A[MIN] LSB Command DQ[1:0] MSB A[MAX] Quad 0 1 DIN MSB 2 Cx C LSB A[MIN] LSB Command DQ[3:0] MSB A[MAX] Note: DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + ((A[MAX] + 1)/2). For quad SPI protocol, Cx = 1 + ((A[MAX] + 1)/4). CLEAR FLAG STATUS REGISTER Command To execute the CLEAR FLAG STATUS REGISTER command and clear the error bits (erase, program, and protection), S# is driven LOW. For extended SPI protocol, the command code is input on DQ0. For dual SPI protocol, the command code is input on DQ[1:0]. For quad SPI protocol, the command code is input on DQ[3:0]. The operation is terminated by driving S# HIGH at any time. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 38 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ IDENTIFICATION Operations READ IDENTIFICATION Operations READ ID and MULTIPLE I/O READ ID Commands To execute the READ ID or MULTIPLE I/O READ ID commands, S# is driven LOW and the command code is input on DQn. The device outputs the information shown in the tables below. If an ERASE or PROGRAM cycle is in progress when the command is executed, the command is not decoded and the command cycle in progress is not affected. When S# is driven HIGH, the device goes to standby. The operation is terminated by driving S# HIGH at any time during data output. Table 20: Data/Address Lines for READ ID and MULTIPLE I/O READ ID Commands Command Name READ ID MULTIPLE I/O READ ID Note: Data In Data Out Unique ID is Output Extended Dual Quad DQ0 DQ0 Yes Yes No No DQ[3:0] DQ[1:0] No No Yes Yes 1. Yes in the protocol columns indicates that the command is supported and has the same functionality and command sequence as other commands marked Yes. Table 21: Read ID Data Out Size (Bytes) Name Content Value 1 Manufacturer ID 20h JEDEC 2 Device ID Memory Type BAh Manufacturer Memory Capacity 21h (1Gb) 17 Assigned by Unique ID 1 Byte: Length of data to follow 10h 2 Bytes: Extended device ID and device configuration information ID and information such as uniform architecture, and HOLD or RESET functionality 14 Bytes: Customized factory data Optional Note: Factory 1. The 17 bytes of information in the unique ID is read by the READ ID command, but cannot be read by the MULTIPLE I/O READ ID command. Table 22: Extended Device ID, First Byte Bit 7 Bit 6 Bit 51 Bit 42 Bit 3 Bit 2 Reserved Reserved 1 = Alternate BP scheme 0 = Standard BP scheme Volatile configuration register bit setting: 0 = Micron XIP 1 = Basic XIP HOLD#/RESET#: 0 = HOLD 1 = RESET Addressing: 0 = by byte Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Bit 1 Bit 0 Architecture: 00 = Uniform 1. For alternate BP scheme information, contact the factory. 2. For more information, contact the factory. 39 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ IDENTIFICATION Operations Figure 13: READ ID and MULTIPLE I/O Read ID Commands Extended (READ ID) 0 7 16 15 8 31 32 C LSB DQ0 Command MSB LSB DOUT DOUT High-Z DQ1 MSB DOUT MSB Manufacturer identification Dual (MULTIPLE I/O READ ID ) 0 LSB DOUT 3 MSB UID Device identification 8 7 4 LSB DOUT DOUT 15 C LSB DQ[1:0] LSB DOUT DOUT Command MSB MSB DOUT MSB Manufacturer identification Quad (MULTIPLE I/O READ ID ) 0 LSB DOUT 1 Device identification 4 3 2 7 C LSB DQ[3:0] Command MSB DOUT LSB DOUT MSB LSB DOUT MSB Manufacturer identification Note: DOUT Device identification Don't Care 1. The READ ID command is represented by the extended SPI protocol timing shown first. The MULTIPLE I/O READ ID command is represented by the dual and quad SPI protocols are shown below extended SPI protocol. READ SERIAL FLASH DISCOVERY PARAMETER Command To execute READ SERIAL FLASH DISCOVERY PARAMETER command, S# is driven LOW. The command code is input on DQ0, followed by three address bytes and eight dummy clock cycles (address is always 3 bytes, even if the device is configured to work in 4-byte address mode). The device outputs the information starting from the specified address. When the 2048-byte boundary is reached, the data output wraps to address 0 of the serial Flash discovery parameter table. The operation is terminated by driving S# HIGH at any time during data output. The operation always executes in continuous mode so the read burst wrap setting in the volatile configuration register does not apply. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 40 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ IDENTIFICATION Operations Table 23: Serial Flash Discovery Parameter Data Structure Compliant with JEDEC standard JC-42.4 1775.03 Address (Byte Mode) Address (Bit) Data 00h 7:0 53h 01h 15:08 46h 02h 23:16 44h 03h 31:24 50h Minor revision 04h 7:0 00h Major revision 05h 15:8 01h Description Serial Flash discoverable parameters signature Serial Flash discoverable parameters Number of parameter headers 06h 7:0 00h Reserved 07h 15:8 FFh Parameter ID (0) JEDEC-defined parameter table 08h 7:0 00h Parameter Minor revision 09h 15:8 00h Major revision 0Ah 23:16 01h Parameter length (DW) 0Bh 31:24 09h Parameter table pointer 0Ch 7:0 30h 0Dh 15:8 00h 0Eh 23:16 00h 0Fh 31:24 FFh Byte Address Bits 512Mb Data 30h 1:0 01b Write granularity 2 1 WRITE ENABLE command required for writing to volatile status registers 3 0 WRITE ENABLE command selected for writing to volatile status registers 4 0 7:5 111b 7:0 20h Reserved Table 24: Parameter ID Description Minimum block/sector erase sizes Reserved 4KB ERASE command 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 31h 41 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ IDENTIFICATION Operations Table 24: Parameter ID (Continued) Byte Address Bits 512Mb Data 32h 0 1 2:1 01b Supports double transfer rate clocking 3 1 Supports DUAL INPUT/OUTPUT FAST READ operation (dual input address, dual output) 4 1 Supports QUAD INPUT/OUTPUT FAST READ operation (quad input address, quad output) 5 1 Supports QUAD OUTPUT FAST READ operation (single input address, quad output) 6 1 Reserved 7 1 Description Supports DUAL OUTPUT FAST READ operation (single input address, dual output) Number of address bytes used (3-byte or 4-byte) for array READ, WRITE, and ERASE commands Reserved 33h 7:0 FFh Flash size (bits) 34h 7:0 FFh 35h 7:0 FFh 36h 7:0 FFh 37h 7:0 3Fh 38h 4:0 01001b 7:5 001b Number of dummy clock cycles required before valid output from QUAD INPUT/OUTPUT FAST READ operation Number of XIP confirmation bits for QUAD INPUT/OUTPUT FAST READ operation Command code for QUAD INPUT/OUTPUT FAST READ operation 39h 7:0 EBh Number of dummy clock cycles required before valid output from QUAD OUTPUT FAST READ operation 3Ah 4:0 00111b 7:5 001b Number of XIP confirmation bits for QUAD OUTPUT FAST READ operation Command code for QUAD OUTPUT FAST READ operation 3Bh 7:0 6Bh Number of dummy clock cycles required before valid output from DUAL OUTPUT FAST READ operation 3Ch 4:0 00111b 7:5 001b Number of XIP confirmation bits for DUAL OUTPUT FAST READ operation Command code for DUAL OUTPUT FAST READ operation 3Dh 7:0 3Bh Number of dummy clock cycles required before valid output from DUAL INPUT/OUTPUT FAST READ operation 3Eh 4:0 00111b 7:5 001b 7:0 BBh Number of XIP confirmation bits for DUAL INPUT/OUTPUT FAST READ Command code for DUAL INPUT/OUTPUT FAST READ operation 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 42 3Fh Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ IDENTIFICATION Operations Table 24: Parameter ID (Continued) Description Supports FAST READ operation in dual SPI protocol Byte Address Bits 512Mb Data 40h 0 1 3:1 111b 4 1 Reserved Supports FAST READ operation in quad SPI protocol Reserved 7:5 111b Reserved 43:41h FFFFFFh FFFFFFh Reserved 45:44h FFFFh FFFFh 46h 4:0 00111b 7:5 001b 47h 7:0 BBh 49:48h FFFFh FFFFh 4Ah 4:0 01001b 7:5 001b Number of dummy clock cycles required before valid output from FAST READ operation in dual SPI protocol Number of XIP confirmation bits for FAST READ operation in dual SPI protocol Command code for FAST READ operation in dual SPI protocol Reserved Number of dummy clock cycles required before valid output from FAST READ operation in quad SPI protocol Number of XIP confirmation bits for FAST READ operation in quad SPI protocol Command code for FAST READ operation in quad SPI protocol 4Bh 7:0 EBh Sector type 1 size (4k) 4Ch 7:0 0Ch Sector type 1 command code (4k) 4Dh 7:0 20h Sector type 2 size (64KB) 4Eh 7:0 10h Sector type 2 command code 64KB) 4Fh 7:0 D8h Sector type 3 size (not present) 50h 7:0 00h Sector type 3 size (not present) 51h 7:0 00h Sector type 4 size (not present) 52h 7:0 00h Sector type 4 size (not present) 53h 7:0 00h 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 43 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations READ MEMORY Operations The device supports default reading and writing to an A[MAX:MIN] of A[23:0] (3-byte address). Reading and writing to an A[MAX:MIN] of A[31:0] (4-byte address) is also supported. Selection of the 3-byte or 4-byte address range can be enabled in two ways: through the nonvolatile configuration register or through the ENABLE 4-BYTE ADDRESS MODE/ EXIT 4-BYTE ADDRESS MODE commands. Further details for these settings and commands are in the respective register and command sections of the data sheet. After any READ command is executed, the device will output data from the selected address in the die. After a die boundary is reached, the device will start reading again from the beginning of the same 256Mb die. A complete device reading is completed by executing READ four times. 3-Byte Address To execute READ MEMORY commands, S# is driven LOW. The command code is input on DQn, followed by input on DQn of three address bytes. Each address bit is latched in during the rising edge of the clock. The addressed byte can be at any location, and the address automatically increments to the next address after each byte of data is shifted out; therefore, a die can be read with a single command. The operation is terminated by driving S# HIGH at any time during data output. Table 25: Command/Address/Data Lines for READ MEMORY Commands Note 1 applies to entire table Command Name DUAL QUAD DUAL OUTPUT INPUT/OUTPUT QUAD OUTPUT INPUT/OUTPUT FAST READ FAST READ FAST READ FAST READ READ FAST READ STR Mode 03 0B 3B BB 6B EB DTR Mode - 0D 3D BD 6D ED Extended SPI Protocol Supported Yes Yes Yes Yes Yes Yes Command Input DQ0 DQ0 DQ0 DQ0 DQ0 DQ0 Address Input DQ0 DQ0 DQ0 DQ[1:0] DQ0 DQ[3:0] Data Output DQ1 DQ1 DQ[1:0] DQ[1:0] DQ[3:0] DQ[3:0] No Yes Yes Yes No No Command Input - DQ[1:0] DQ[1:0] DQ[1:0] - - Address Input - DQ[1:0] DQ[1:0] DQ[1:0] - - Data Output - DQ[1:0] DQ[1:0] DQ[1:0] - - No Yes No No Yes Yes Command Input - DQ[3:0] - - DQ[3:0] DQ[3:0] Address Input - DQ[3:0] - - DQ[3:0] DQ[3:0] Dual SPI Protocol Supported Quad SPI Protocol Supported 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 44 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Table 25: Command/Address/Data Lines for READ MEMORY Commands (Continued) Note 1 applies to entire table Command Name DUAL QUAD DUAL OUTPUT INPUT/OUTPUT QUAD OUTPUT INPUT/OUTPUT FAST READ FAST READ FAST READ FAST READ READ FAST READ STR Mode 03 0B 3B BB DTR Mode - 0D 3D BD 6D ED Data Output - DQ[3:0] - - DQ[3:0] DQ[3:0] Notes: 6B EB 1. Yes in the "Supported' row for each protocol indicates that the command in that column is supported; when supported, a command's functionality is identical for the entire column regardless of the protocol. For example, a FAST READ functions the same for all three protocols even though its data is input/output differently depending on the protocol. 2. FAST READ is similar to READ, but requires dummy clock cycles following the address bytes and can operate at a higher frequency (fC). 4-Byte Address To execute 4-byte READ MEMORY commands, S# is driven LOW. The command code is input on DQn, followed by input on DQn of four address bytes. Each address bit is latched in during the rising edge of the clock. The addressed byte can be at any location, and the address automatically increments to the next address after each byte of data is shifted out; therefore, a die can be read with a single command. The operation is terminated by driving S# HIGH at any time during data output. Table 26: Command/Address/Data Lines for READ MEMORY Commands - 4-Byte Address Notes 1 and 2 apply to entire table Command Name (4-Byte Address) DUAL OUTPUT FAST READ DUAL INPUT/OUTPUT FAST READ QUAD OUTPUT FAST READ QUAD INPUT/OUTPUT FAST READ READ FAST READ STR Mode 03/13 0B/0C 3B/3C BB/BC 6B/6C EB/EC DTR Mode - 0D 3D BD 6D ED Extended SPI Protocol Supported Yes Yes Yes Yes Yes Yes Command Input DQ0 DQ0 DQ0 DQ0 DQ0 DQ0 Address Input DQ0 DQ0 DQ0 DQ[1:0] DQ0 DQ[3:0] Data Output DQ1 DQ1 DQ[1:0] DQ[1:0] DQ[3:0] DQ[3:0] No Yes Yes Yes No No Command Input - DQ[1:0] DQ[1:0] DQ[1:0] - - Address Input - DQ[1:0] DQ[1:0] DQ[1:0] - - Data Output - DQ[1:0] DQ[1:0] DQ[1:0] - - Dual SPI Protocol Supported 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 45 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Table 26: Command/Address/Data Lines for READ MEMORY Commands - 4-Byte Address (Continued) Notes 1 and 2 apply to entire table Command Name (4-Byte Address) READ FAST READ DUAL OUTPUT FAST READ DUAL INPUT/OUTPUT FAST READ QUAD OUTPUT FAST READ QUAD INPUT/OUTPUT FAST READ STR Mode 03/13 0B/0C 3B/3C BB/BC 6B/6C EB/EC DTR Mode - 0D 3D BD 6D ED No Yes No No Yes Yes Command Input - DQ[3:0] - - DQ[3:0] DQ[3:0] Address Input - DQ[3:0] - - DQ[3:0] DQ[3:0] Data Output - DQ[3:0] - - DQ[3:0] DQ[3:0] Quad SPI Protocol Supported Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Yes in the "Supported' row for each protocol indicates that the command in that column is supported; when supported, a command's functionality is identical for the entire column regardless of the protocol. For example, a FAST READ functions the same for all three protocols even though its data is input/output differently depending on the protocol. 2. Command codes 13, 0C, 3C, BC, 6C, and EC do not need to be set up in the addressing mode; they will work directly in 4-byte addressing mode. 3. A 4-BYTE FAST READ command is similar to 4-BYTE READ operation, but requires dummy clock cycles following the address bytes and can operate at a higher frequency (fC). 46 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Figure 14: READ Command Extended 0 7 8 Cx C LSB A[MIN] Command DQ[0] MSB A[MAX] DOUT High-Z DQ1 DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT DOUT MSB Don't Care Note: 1. Cx = 7 + (A[MAX] + 1). READ MEMORY Operations Timing - Single Transfer Rate Figure 15: FAST READ Command Extended 0 7 8 Cx C LSB A[MIN] Command DQ0 MSB A[MAX] DQ1 DOUT High-Z DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT DOUT DOUT DOUT LSB DOUT DOUT MSB Dummy cycles Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] MSB A[MAX] MSB Dummy cycles Quad 0 1 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB A[MAX] LSB DOUT DOUT MSB Don't Care Dummy cycles Note: 1. For extended protocol, Cx = 7 + (A[MAX] + 1). For dual protocol, Cx = 3 + (A[MAX] + 1)/2. For quad protocol, Cx = 1 + (A[MAX] + 1)/4. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 47 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Figure 16: DUAL OUTPUT FAST READ Command Extended 0 7 8 Cx C LSB A[MIN] Command DQ0 MSB DOUT DOUT DOUT LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT DOUT A[MAX] High-Z DQ1 DOUT MSB Dummy cycles Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] MSB A[MAX] DOUT MSB Dummy cycles Notes: 1. Cx = 7 + (A[MAX] + 1). 2. Shown here is the DUAL OUTPUT FAST READ timing for the extended SPI protocol. The dual timing shown for the FAST READ command is the equivalent of the DUAL OUTPUT FAST READ timing for the dual SPI protocol. Figure 17: DUAL INPUT/OUTPUT FAST READ Command Extended 0 7 8 Cx C LSB A[MIN] Command DQ0 DOUT DOUT DOUT LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT DOUT MSB High-Z DQ1 A[MAX] DOUT MSB Dummy cycles Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] MSB A[MAX] DOUT MSB Dummy cycles Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Cx = 7 + (A[MAX] + 1)/2. 2. Shown here is the DUAL INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The dual timing shown for the FAST READ command is the equivalent of the DUAL INPUT/OUTPUT FAST READ timing for the dual SPI protocol. 48 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Figure 18: QUAD OUTPUT FAST READ Command Extended 0 7 8 Cx C LSB A[MIN] DOUT LSB DOUT DOUT High-Z DOUT DOUT DOUT `1' DOUT DOUT DOUT Command DQ0 MSB A[MAX] DQ[2:1] DQ3 MSB Dummy cycles Quad 0 1 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB A[MAX] LSB DOUT DOUT MSB Dummy cycles Notes: 1. Cx = 7 + (A[MAX] + 1). 2. Shown here is the QUAD OUTPUT FAST READ timing for the extended SPI protocol. The quad timing shown for the FAST READ command is the equivalent of the QUAD OUTPUT FAST READ timing for the quad SPI protocol. Figure 19: QUAD INPUT/OUTPUT FAST READ Command 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 49 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Extended 0 7 8 Cx C LSB DQ0 Command A[MIN] DOUT LSB DOUT DOUT High-Z DOUT DOUT DOUT DOUT DOUT DOUT MSB DQ[2:1] `1' DQ3 A[MAX] MSB Dummy cycles Quad 0 1 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB A[MAX] LSB DOUT DOUT MSB Dummy cycles Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Cx = 7 + (A[MAX] + 1)/4. 2. Shown here is the QUAD INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The quad timing shown for the FAST READ command is the equivalent of the QUAD INPUT/OUTPUT FAST READ timing for the quad SPI protocol. 50 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations READ MEMORY Operations Timing - Double Transfer Rate Figure 20: FAST READ Command - DTR Extended 0 7 8 Cx C LSB A[MIN] Command DQ0 MSB A[MAX] DQ1 DOUT High-Z LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT MSB Dummy cycles Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] MSB A[MAX] LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT MSB Dummy cycles Quad 0 1 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB A[MAX] LSB DOUT DOUT DOUT MSB Don't Care Dummy cycles Note: 1. For extended protocol, Cx = 7 + (A[MAX] + 1)/2. For dual protocol, Cx = 3 + (A[MAX] + 1)/4. For quad protocol, Cx = 1 + (A[MAX] + 1)/8. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 51 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Figure 21: DUAL OUTPUT FAST READ Command - DTR Extended 0 7 8 Cx C LSB DQ0 A[MIN] Command MSB DOUT LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT A[MAX] High-Z DQ1 MSB Dummy cycles Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] A[MAX] MSB DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT MSB Dummy cycles Notes: 1. Cx = 7 + (A[MAX] + 1)/2. 2. Shown here is the DUAL OUTPUT FAST READ timing for the extended SPI protocol. The dual timing shown for the FAST READ command is the equivalent of the DUAL OUTPUT FAST READ timing for the dual SPI protocol. Figure 22: DUAL INPUT/OUTPUT FAST READ Command - DTR Extended 0 7 8 Cx C LSB A[MIN] Command DQ0 DOUT LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT MSB High-Z DQ1 A[MAX] MSB Dummy cycles Dual 0 3 4 Cx C LSB A[MIN] DOUT Command DQ[1:0] MSB A[MAX] LSB DOUT DOUT DOUT DOUT DOUT DOUT DOUT MSB Dummy cycles Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Cx = 7 + (A[MAX] + 1)/4. 2. Shown here is the DUAL INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The dual timing shown for the FAST READ command is the equivalent of the DUAL INPUT/OUTPUT FAST READ timing for the dual SPI protocol. 52 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations Figure 23: QUAD OUTPUT FAST READ Command - DTR Extended 0 7 8 Cx C LSB A[MIN] DOUT LSB DOUT DOUT DOUT High-Z DOUT DOUT DOUT DOUT `1' DOUT DOUT DOUT DOUT Command DQ0 MSB A[MAX] DQ[2:1] DQ3 MSB Dummy cycles Quad 0 1 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB A[MAX] LSB DOUT DOUT DOUT MSB Dummy cycles Notes: 1. Cx = 7 + (A[MAX] + 1)/2. 2. Shown here is the QUAD OUTPUT FAST READ timing for the extended SPI protocol. The quad timing shown for the FAST READ command is the equivalent of the QUAD OUTPUT FAST READ timing for the quad SPI protocol. Figure 24: QUAD INPUT/OUTPUT FAST READ Command - DTR Extended 0 7 8 Cx C LSB DQ0 Command A[MIN] DOUT LSB DOUT DOUT DOUT High-Z DOUT DOUT DOUT DOUT DOUT DOUT DOUT DOUT MSB DQ[2:1] `1' DQ3 A[MAX] MSB Dummy cycles Quad 0 1 2 Cx C LSB A[MIN] DOUT Command DQ[3:0] MSB A[MAX] LSB DOUT DOUT DOUT MSB Dummy cycles Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Cx = 7 + (A[MAX] + 1)/8. 53 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory READ MEMORY Operations 2. Shown here is the QUAD INPUT/OUTPUT FAST READ timing for the extended SPI protocol. The quad timing shown for the FAST READ command is the equivalent of the QUAD INPUT/OUTPUT FAST READ timing for the quad SPI protocol. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 54 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory PROGRAM Operations PROGRAM Operations PROGRAM commands are initiated by first executing the WRITE ENABLE command to set the write enable latch bit to 1. S# is then driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by input on DQ[n] of address bytes and at least one data byte. Each address bit is latched in during the rising edge of the clock. When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is tPP. If the bits of the least significant address, which is the starting address, are not all zero, all data transmitted beyond the end of the current page is programmed from the starting address of the same page. If the number of bytes sent to the device exceed the maximum page size, previously latched data is discarded and only the last maximum pagesize number of data bytes are guaranteed to be programmed correctly within the same page. If the number of bytes sent to the device is less than the maximum page size, they are correctly programmed at the specified addresses without any effect on the other bytes of the same page. When the operation is in progress, the program or erase controller bit of the flag status register is set to 0. The write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation is considered complete after bit 7 of the flag status register outputs 1 with at least one byte output. When the operation completes, the program or erase controller bit is cleared to 1. If the operation times out, the write enable latch bit is reset and the program fail bit is set to 1. If S# is not driven HIGH, the command is not executed, flag status register error bits are not set, and the write enable latch remains set to 1. When a command is applied to a protected sector, the command is not executed, the write enable latch bit remains set to 1, and flag status register bits 1 and 4 are set. Note that the flag status register must be polled even if operation times out. Table 27: Data/Address Lines for PROGRAM Commands Note 1 applies to entire table Command Name Data In Address In Extended Dual Quad DQ0 DQ0 Yes Yes Yes DUAL INPUT FAST PROGRAM DQ[1:0] DQ0 Yes Yes No EXTENDED DUAL INPUT FAST PROGRAM DQ[1:0] DQ[1:0] Yes Yes No QUAD INPUT FAST PROGRAM DQ[3:0] DQ0 Yes No Yes EXTENDED QUAD INPUT FAST PROGRAM DQ[3:0] DQ[3:0] Yes No Yes PAGE PROGRAM Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Yes in the protocol columns indicates that the command is supported and has the same functionality and command sequence as other commands marked Yes. 55 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory PROGRAM Operations Figure 25: PAGE PROGRAM Command Extended 0 7 8 Cx C LSB A[MIN] LSB Command DQ0 MSB A[MAX] Dual 0 3 DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN MSB 4 Cx C LSB A[MIN] LSB Command DQ[1:0] MSB A[MAX] Quad 0 1 DIN MSB 2 Cx C LSB A[MIN] LSB Command DQ[3:0] MSB A[MAX] Note: DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 56 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory PROGRAM Operations Figure 26: DUAL INPUT FAST PROGRAM Command Extended 0 7 8 Cx C LSB A[MIN] Command DQ0 MSB DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN A[MAX] High-Z DQ1 LSB DIN MSB Dual 0 3 4 Cx C LSB A[MIN] LSB DIN Command DQ[1:0] MSB Note: A[MAX] DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. Figure 27: EXTENDED DUAL INPUT FAST PROGRAM Command Extended 0 7 8 Cx C LSB A[MIN] LSB Command DQ0 DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN MSB High-Z DQ1 A[MAX] Dual 0 3 MSB 4 Cx C LSB A[MIN] LSB Command DQ[1:0] MSB Note: A[MAX] DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/2. For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 57 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory PROGRAM Operations Figure 28: QUAD INPUT FAST PROGRAM Command Extended 0 7 8 Cx C LSB A[MIN] LSB Command DQ0 MSB DIN DIN DIN DIN DIN DIN DIN A[MAX] High-Z DQ[3:1] DIN MSB Quad 0 1 2 Cx C LSB A[MIN] LSB Command DQ[3:0] MSB Note: A[MAX] DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/4. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 58 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory PROGRAM Operations Figure 29: EXTENDED QUAD INPUT FAST PROGRAM Command Extended 0 7 8 Cx C LSB A[MIN] LSB DIN DIN DIN High-Z DIN DIN DIN `1' DIN DIN DIN DIN DIN Command DQ0 MSB DQ[2:1] DQ3 A[MAX] Quad 0 1 MSB 2 Cx C LSB A[MIN] LSB Command DQ[3:0] MSB Note: A[MAX] DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1)/4. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 59 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory WRITE Operations WRITE Operations WRITE ENABLE Command The WRITE ENABLE operation sets the write enable latch bit. To execute a WRITE ENABLE command, S# is driven LOW and held LOW until the eighth bit of the command code has been latched in, after which it must be driven HIGH. The command code is input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and on DQ[3:0] for quad SPI protocol. The write enable latch bit must be set before every PROGRAM, ERASE, WRITE, ENTER 4-BYTE ADDRESS MODE, and EXIT 4-BYTE ADDRESS MODE command. If S# is not driven HIGH after the command code has been latched in, the command is not executed, flag status register error bits are not set, and the write enable latch remains cleared to its default setting of 0. WRITE DISABLE Command The WRITE DISABLE operation clears the write enable latch bit. To execute a WRITE DISABLE command, S# is driven LOW and held LOW until the eighth bit of the command code has been latched in, after which it must be driven HIGH. The command code is input on DQ0 for extended SPI protocol, on DQ[1:0] for dual SPI protocol, and on DQ[3:0] for quad SPI protocol. If S# is not driven HIGH after the command code has been latched in, the command is not executed, flag status register error bits are not set, and the write enable latch remains set to 1. Note: In case of a protection error, write disable will not clear the write enable latch. In this situation, a CLEAR FLAG STATUS REGISTER command must be issued to clear both flags. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 60 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory WRITE Operations Figure 30: WRITE ENABLE and WRITE DISABLE Command Sequence Extended 0 1 2 3 4 5 6 7 C S# Command Bits DQ0 0 0 0 0 0 LSB 1 1 0 MSB High-Z DQ1 Dual 0 1 2 3 C S# Command Bits DQ0 DQ1 LSB 0 0 1 0 0 0 0 1 MSB Quad 0 1 C S# Command Bits LSB DQ0 0 0 DQ1 0 1 DQ2 0 1 DQ3 0 0 Don't Care MSB Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Shown here is the WRITE ENABLE command code, which is 06h or 0000 0110 binary. The WRITE DISABLE command sequence is identical, except the WRITE DISABLE command code is 04h or 0000 0100 binary. 61 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ERASE Operations ERASE Operations When the operation is in progress, the program or erase controller bit of the flag status register is set to 0. The flag status register must be polled for the operation status. When the operation completes, that bit is cleared to 1. Note that the flag status register must be polled even if operation times out. SUBSECTOR ERASE Command To execute the SUBSECTOR ERASE command (and set the selected subsector bits to FFh), the WRITE ENABLE command must be issued to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by address bytes; any address within the subsector is valid. Each address bit is latched in during the rising edge of the clock. When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is tSSE. The operation can be suspended and resumed by the PROGRAM/ERASE SUSPEND and PROGRAM/ERASE RESUME commands, respectively. If the write enable latch bit is not set, the device ignores the SUBSECTOR ERASE command and no error bits are set to indicate operation failure. When the operation is in progress, the program or erase controller bit is set to 0. The write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation is considered complete once bit 7 of the flag status register outputs 1 with at least one byte output. When the operation completes, the program or erase controller bit is cleared to 1. If the operation times out, the write enable latch bit is reset and the erase error bit is set to 1. If S# is not driven HIGH, the command is not executed, flag status register error bits are not set, and the write enable latch remains set to 1. When a command is applied to a protected subsector, the command is not executed. Instead, the write enable latch bit remains set to 1, and flag status register bits 1 and 5 are set. SECTOR ERASE Command To execute the SECTOR ERASE command (and set selected sector bits to FFh), the WRITE ENABLE command must be issued to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by address bytes; any address within the sector is valid. Each address bit is latched in during the rising edge of the clock. When S# is driven HIGH, the operation, which is selftimed, is initiated; its duration is tSE. The operation can be suspended and resumed by the PROGRAM/ERASE SUSPEND and PROGRAM/ERASE RESUME commands, respectively. If the write enable latch bit is not set, the device ignores the SECTOR ERASE command and no error bits are set to indicate operation failure. When the operation is in progress, the program or erase controller bit is set to 0. The write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation is considered complete once bit 7 of the flag status register outputs 1 with at least one 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 62 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ERASE Operations byte output. When the operation completes, the program or erase controller bit is cleared to 1. If the operation times out, the write enable latch bit is reset and erase error bit is set to 1. If S# is not driven HIGH, the command is not executed, flag status register error bits are not set, and the write enable latch remains set to 1. When a command is applied to a protected sector, the command is not executed. Instead, the write enable latch bit remains set to 1, and flag status register bits 1 and 5 are set. Figure 31: SUBSECTOR and SECTOR ERASE Command Extended 0 7 8 Cx C A[MIN] LSB DQ0 Command A[MAX] MSB Dual 0 3 4 Cx C LSB DQ0[1:0] A[MIN] Command MSB Quad A[MAX] 0 1 2 Cx C LSB MSB Note: A[MIN] Command DQ0[3:0] A[MAX] 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. DIE ERASE Command To initiate the DIE ERASE command, the WRITE ENABLE command must be issued to set the write enable latch bit to 1. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0, followed by address bytes; any address within the single 256Mb die is valid. Each address bit is latched in during the rising edge of the clock. When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is tDSE. If the write enable latch bit is not set, the device ignores the DIE ERASE command and no error bits are set to indicate operation failure. When the operation is in progress, the program or erase controller bit is set to 0. The write enable latch bit is cleared to 0, whether the operation is successful or not. The status register and flag status register can be polled for the operation status. The operation is considered complete once bit 7 of the flag status register outputs 1 with at least one 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 63 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ERASE Operations byte output. When the operation completes, the program or erase controller bit is cleared to 1. The command is not executed if any sector is locked. Instead, the write enable latch bit remains set to 1, and flag status register bits 1 and 5 are set. Figure 32: DIE ERASE Command Extended 0 7 8 Cx C LSB DQ0 A[MIN] Command MSB Dual A[MAX] 0 3 4 Cx C LSB DQ0[1:0] A[MIN] Command MSB Quad A[MAX] 0 1 2 Cx C LSB MSB Note: A[MIN] Command DQ0[3:0] A[MAX] 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. PROGRAM/ERASE SUSPEND Command To initiate the PROGRAM/ERASE SUSPEND command, S# is driven LOW. The command code is input on DQ0. The operation is terminated by the PROGRAM/ERASE RESUME command. PROGRAM/ERASE SUSPEND command enables the memory controller to interrupt and suspend an array PROGRAM or ERASE operation within the program/erase latency. If a SUSPEND command is issued during a PROGRAM operation, then the flag status register bit 2 is set to 1. After erase/program latency time, the flag status register bit 7 is also set to 1, but the device is considered in suspended state once bit 7 of the flag status register outputs 1 with at least one byte output. In the suspended state, the device is waiting for any operation. (See the Operations Allowed/Disallowed During Device States table.) If a SUSPEND command is issued during an ERASE operation, then the flag status register bit 6 is set to 1. After erase/program latency time, the flag status register bit 7 is also set to 1, but the device is considered in suspended state once bit 7 of the flag status register outputs 1 with at least one byte output. In the suspended state, the device is waiting for any operation. (See the Operations Allowed/Disallowed During Device States table.) 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 64 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ERASE Operations If the time remaining to complete the operation is less than the suspend latency, the device completes the operation and clears the flag status register bits 2 or 6, as applicable. Because the suspend state is volatile, if there is a power cycle, the suspend state information is lost and the flag status register powers up as 80h. During an ERASE SUSPEND operation, a PROGRAM or READ operation is possible in any sector except the one in a suspended state. Reading from a sector that is in a suspended state will output indeterminate data. The device ignores a PROGRAM command to a sector that is in an erase suspend state; it also sets the flag status register bit 4 to 1, program failure/protection error, and leaves the write enable latch bit unchanged. The commands allowed during an erase suspend state are shown in the Operations Allowed/Disallowed During Device States table. When the ERASE resumes, it does not check the new lock status of the WRITE LOCK REGISTER command. During a PROGRAM SUSPEND operation, a READ operation is possible in any page except the one in a suspended state. Reading from a page that is in a suspended state will output indeterminate data. The commands allowed during a program suspend state include the WRITE VOLATILE CONFIGURATION REGISTER command and the WRITE ENHANCED VOLATILE CONFIGURATION REGISTER command. It is possible to nest a PROGRAM/ERASE SUSPEND operation inside a PROGRAM/ ERASE SUSPEND operation just once. Issue an ERASE command and suspend it. Then issue a PROGRAM command and suspend it also. With the two operations suspended, the next PROGRAM/ERASE RESUME command resumes the latter operation, and a second PROGRAM/ERASE RESUME command resumes the former (or first) operation. Table 28: Suspend Parameters Parameter Condition Typ Max Units Notes Erase to suspend Sector erase or erase resume to erase suspend 700 - s 1 Program to suspend Program resume to program suspend 5 - s 1 Subsector erase to suspend Subsector erase or subsector erase resume to erase suspend 50 - s 1 Suspend latency Program 7 - s 2 Suspend latency Subsector erase 15 - s 2 Suspend latency Erase 15 - s 3 Notes: 1. Timing is not internally controlled. 2. Any READ command accepted. 3. Any command except the following are accepted: SECTOR, SUBSECTOR, or DIE ERASE; WRITE STATUS REGISTER; WRITE NONVOLATILE CONFIGURATION REGISTER; and PROGRAM OTP. Table 29: Operations Allowed/Disallowed During Device States Note 1 applies to entire table Standby Operation State Program or Erase State Subsector Erase Suspend or Program Suspend State Erase Suspend State Notes READ Yes No Yes Yes 2 PROGRAM Yes No No Yes/No 3 ERASE Yes No No No 4 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 65 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ERASE Operations Table 29: Operations Allowed/Disallowed During Device States (Continued) Note 1 applies to entire table Standby Operation State Program or Erase State Subsector Erase Suspend or Program Suspend State Erase Suspend State Notes WRITE Yes No No No 5 WRITE Yes No Yes Yes 6 READ Yes Yes Yes Yes 7 SUSPEND No Yes No No 8 Notes: 1. The device can be in only one state at a time. Depending on the state of the device, some operations are allowed (Yes) and others are not (No). For example, when the device is in the standby state, all operations except SUSPEND are allowed in any sector. For all device states except the erase suspend state, if an operation is allowed or disallowed in one sector, it is allowed or disallowed in all other sectors. In the erase suspend state, a PROGRAM operation is allowed in any sector except the one in which an ERASE operation has been suspended. 2. All READ operations except READ STATUS REGISTER and READ FLAG REGISTER. When issued to a sector or subsector that is simultaneously in an erase suspend state, the READ operation is accepted, but the data output is not guaranteed until the erase has completed. 3. All PROGRAM operations except PROGRAM OTP. In the erase suspend state, a PROGRAM operation is allowed in any sector (Yes) except the sector (No) in which an ERASE operation has been suspended. 4. Applies to the SECTOR ERASE or SUBSECTOR ERASE operation. 5. Applies to the following operations: WRITE STATUS REGISTER, WRITE NONVOLATILE CONFIGURATION REGISTER, PROGRAM OTP, and DIE ERASE. 6. Applies to the WRITE VOLATILE CONFIGURATION REGISTER, WRITE ENHANCED VOLATILE CONFIGURATION REGISTER, WRITE ENABLE, WRITE DISABLE, CLEAR FLAG STATUS REGISTER, WRITE EXTENDED ADDRESS REGISTER, ENTER 4-BYTE EXTENDED ADDRESS REGISTER, EXIT 4-BYTE EXTENDED ADDRESS REGISTER, or WRITE LOCK REGISTER operation. 7. Applies to the READ STATUS REGISTER or READ FLAG STATUS REGISTER operation. 8. Applies to the PROGRAM SUSPEND or ERASE SUSPEND operation. PROGRAM/ERASE RESUME Command To initiate the PROGRAM/ERASE RESUME command, S# is driven LOW. The command code is input on DQ0. The operation is terminated by driving S# HIGH. When this command is executed, the status register write in progress bit is set to 1, and the flag status register program erase controller bit is set to 0. This command is ignored if the device is not in a suspended state. When the operation is in progress, the program or erase controller bit of the flag status register is set to 0. The flag status register must be polled for the operation status. When the operation completes, that bit is cleared to 1. Note that the flag status register must be polled even if operation times out. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 66 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory RESET Operations RESET Operations Table 30: Reset Command Set Command Command Code (Binary) Command Code (Hex) Address Bytes RESET ENABLE 0110 0110 66 0 RESET MEMORY 1001 1001 99 0 RESET ENABLE and RESET MEMORY Command To reset the device, the RESET ENABLE command must be followed by the RESET MEMORY command. To execute each command, S# is driven LOW. The command code is input on DQ0. A minimum de-selection time of tSHSL2 must come between the RESET ENABLE and RESET MEMORY commands or a reset is not guaranteed. When these two commands are executed and S# is driven HIGH, the device enters a power-on reset condition. A time of tSHSL3 is required before the device can be re-selected by driving S# LOW. It is recommended that the device exit XIP mode before executing these two commands to initiate a reset. If a reset is initiated while a WRITE, PROGRAM, or ERASE operation is in progress or suspended, the operation is aborted and data may be corrupted. Figure 33: RESET ENABLE and RESET MEMORY Command 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 C Reset enable Reset memory S# DQ0 Note: 1. The number of lines and rate for transmission varies with extended, dual, or quad SPI. RESET Conditions All volatile lock bits, the volatile configuration register, the enhanced volatile configuration register, and the extended address register are reset to the power-on reset default condition. The power-on reset condition depends on settings in the nonvolatile configuration register. Reset is effective once bit 7 of the flag status register outputs 1 with at least one byte output. A RESET ENABLE command is not accepted in the cases of WRITE STATUS REGISTER and WRITE NONVOLATILE CONFIGURATION REGISTER operations. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 67 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ONE-TIME PROGRAMMABLE Operations ONE-TIME PROGRAMMABLE Operations READ OTP ARRAY Command To initiate a READ OTP ARRAY command, S# is driven LOW. The command code is input on DQ0/DQ4, followed by address bytes and dummy clock cycles. Each address bit is latched in during the rising edge of C. Data is shifted out on DQ1/DQ5, beginning from the specified address and at a maximum frequency of fC (MAX) on the falling edge of the clock. The address increments automatically to the next address after each byte of data is shifted out. There is no rollover mechanism; therefore, if read continuously, after location 0x40, the device continues to output data at location 0x40. The operation is terminated by driving S# HIGH at any time during data output. Figure 34: READ OTP Command Extended 0 7 8 Cx C, C_1, C_2 LSB A[MIN] Command DQ0/DQ4 MSB A[MAX] DQ1/DQ5 DOUT High-Z DOUT DOUT DOUT DOUT DOUT DOUT LSB DOUT DOUT DOUT DOUT LSB DOUT DOUT MSB Dummy cycles Dual 0 3 4 Cx C, C_1, C_2 LSB DQ[1:0]/DQ[5:4] A[MIN] DOUT Command MSB A[MAX] MSB Dummy cycles Quad 0 1 2 Cx C, C_1, C_2 LSB DQ[3:0]/DQ[7:4] A[MIN] DOUT Command MSB A[MAX] LSB DOUT DOUT MSB Don't Care Dummy cycles Note: 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. PROGRAM OTP ARRAY Command To initiate the PROGRAM OTP ARRAY command, the WRITE ENABLE command must be issued to set the write enable latch bit to 1; otherwise, the PROGRAM OTP ARRAY command is ignored and flag status register bits are not set. S# is driven LOW and held LOW until the eighth bit of the last data byte has been latched in, after which it must be driven HIGH. The command code is input on DQ0/DQ4, followed by address bytes and at least one data byte. Each address bit is latched in during the rising edge of the clock. When S# is driven HIGH, the operation, which is self-timed, is initiated; its duration is tPOTP. There is no rollover mechanism; therefore, after a maximum of 65 bytes are latched in the subsequent bytes are discarded. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 68 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ONE-TIME PROGRAMMABLE Operations PROGRAM OTP ARRAY programs, at most, 64 bytes to the OTP memory area and one OTP control byte. When the operation is in progress, the write in progress bit is set to 1. The write enable latch bit is cleared to 0, whether the operation is successful or not, and the status register and flag status register can be polled for the operation status. When the operation completes, the write in progress bit is cleared to 0. If the operation times out, the write enable latch bit is reset and the program fail bit is set to 1. If S# is not driven HIGH, the command is not executed, flag status register error bits are not set, and the write enable latch remains set to 1. The operation is considered complete once bit 7 of the flag status register outputs 1 with at least one byte output. The OTP control byte (byte 64) is used to permanently lock the OTP memory array. Table 31: OTP Control Byte (Byte 64) Bit Name 0 OTP control byte Settings Description 0 = Locked 1 = Unlocked (Default) Used to permanently lock the 64-byte OTP array. When bit 0 = 1, the 64-byte OTP array can be programmed. When bit 0 = 0, the 64-byte OTP array is read only. Once bit 0 has been programmed to 0, it can no longer be changed to 1. Program OTP array is ignored, the write enable latch bit remains set, and flag status register bits 1 and 4 are set. Figure 35: PROGRAM OTP Command Extended 0 7 8 Cx C, C_1, C_2 LSB A[MIN] LSB Command DQ0/DQ4 MSB Dual A[MAX] 0 3 DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN DIN MSB 4 Cx C, C_1, C_2 LSB A[MIN] LSB Command DQ[1:0]/DQ[5:4] MSB Quad A[MAX] 0 1 DIN MSB 2 Cx C, C_1, C_2 LSB A[MIN] LSB Command DQ[3:0]/DQ[7:4] MSB Note: A[MAX] DIN MSB 1. For extended SPI protocol, Cx = 7 + (A[MAX] + 1). For dual SPI protocol, Cx = 3 + (A[MAX] + 1)/2. For quad SPI protocol, Cx = 1 + (A[MAX] + 1)/4. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 69 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory ADDRESS MODE Operations - Enter and Exit 4-Byte Address Mode ADDRESS MODE Operations - Enter and Exit 4-Byte Address Mode ENTER or EXIT 4-BYTE ADDRESS MODE Command Both ENTER 4-BYTE ADDRESS MODE and EXIT 4-BYTE ADDRESS MODE commands share the same requirements. To enter or exit the 4-byte address mode, the WRITE ENABLE command must be executed to set the write enable latch bit to 1. S# must be driven LOW. The command must be input on DQn. The effect of the command is immediate; after the command has been executed, the write enable latch bit is cleared to 0. The default address mode is three bytes, and the device returns to the default upon exiting the 4-byte address mode. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 70 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory XIP Mode XIP Mode Execute-in-place (XIP) mode allows the memory to be read by sending an address to the device and then receiving the data on one, two, or four pins in parallel, depending on the customer requirements. XIP mode offers maximum flexibility to the application, saves instruction overhead, and reduces random access time. Activate or Terminate XIP Using Volatile Configuration Register Applications that boot in SPI and must switch to XIP use the volatile configuration register. XIP provides faster memory READ operations by requiring only an address to execute, rather than a command code and an address. To activate XIP requires two steps. First, enable XIP by setting volatile configuration register bit 3 to 0. Next, drive the XIP confirmation bit to 0 during the next FAST READ operation. XIP is then active. Once in XIP, any command that occurs after S# is toggled requires only address bits to execute; a command code is not necessary, and device operations use the SPI protocol that is enabled. XIP is terminated by driving the XIP confirmation bit to 1. The device automatically resets volatile configuration register bit 3 to 1. Note: For devices with basic XIP, indicated by a part number feature set digit of 2 or 4, it is not necessary to set the volatile configuration register bit 3 to 0 to enable XIP. Instead, it is enabled by setting the XIP confirmation bit to 0 during the first dummy clock cycle after any FAST READ command. Activate or Terminate XIP Using Nonvolatile Configuration Register Applications that must boot directly in XIP use the nonvolatile configuration register. To enable a device to power-up in XIP using the nonvolatile configuration register, set nonvolatile configuration register bits [11:9]. Settings vary according to protocol, as explained in the Nonvolatile Configuration Register section. Because the device boots directly in XIP, after the power cycle, no command code is necessary. XIP is terminated by driving the XIP confirmation bit to 1. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 71 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory XIP Mode Figure 36: XIP Mode Directly After Power-On 0 Mode 3 C tVSI VCC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 Mode 0 (<100) NVCR check: XIP enabled S# A[MIN] DQ0 LSB DOUT DOUT DOUT DOUT DOUT Xb DOUT DOUT DOUT DOUT DOUT DQ[3:1] A[MAX] MSB Dummy cycles Note: 1. Xb is the XIP confirmation bit and should be set as follows: 0 to keep XIP state; 1 to exit XIP mode and return to standard read mode. Confirmation Bit Settings Required to Activate or Terminate XIP The XIP confirmation bit setting activates or terminates XIP after it has been enabled or disabled. This bit is the value on DQ0 during the first dummy clock cycle in the FAST READ operation. In dual I/O XIP mode, the value of DQ1 during the first dummy clock cycle after the addresses is always "Don't Care." In quad I/O XIP mode, the values of DQ3, DQ2, and DQ1 during the first dummy clock cycle after the addresses are always "Don't Care." Table 32: XIP Confirmation Bit Bit Value Description 0 Activates XIP: While this bit is 0, XIP remains activated. 1 Terminates XIP: When this bit is set to 1, XIP is terminated and the device returns to SPI. Table 33: Effects of Running XIP in Different Protocols Protocol Extended I/O and Dual I/O Dual I/O 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Effect In a device with a dedicated part number where RST# is enabled, a LOW pulse on that pin resets XIP and the device to the state it was in previous to the last power-up, as defined by the nonvolatile configuration register. Values of DQ1 during the first dummy clock cycle are "Don't Care." 72 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory XIP Mode Table 33: Effects of Running XIP in Different Protocols (Continued) Protocol Effect Quad I/O1 Values of DQ[3:1] during the first dummy clock cycle are "Don't Care." In a device with a dedicated part number, it is only possible to reset memory when the device is deselected. Note: 1. In a device with a dedicated part number where RST# is enabled, a LOW pulse on that pin resets XIP and the device to the state it was in previous to the last power-up, as defined by the nonvolatile configuration register only when the device is deselected. Terminating XIP After a Controller and Memory Reset The system controller and the device can become out of synchronization if, during the life of the application, the system controller is reset without the device being reset. In such a case, the controller can reset the memory to power-on reset if the memory has reset functionality. (Reset is available in devices with a dedicated part number.) * 7 clock cycles within S# LOW (S# becomes HIGH before 8th clock cycle) * + 9 clock cycles within S# LOW (S# becomes HIGH before 10th clock cycle) * + 13 clock cycles within S# LOW (S# becomes HIGH before 14th clock cycle) * + 17 clock cycles within S# LOW (S# becomes HIGH before 18th clock cycle) * + 25 clock cycles within S# LOW (S# becomes HIGH before 26th clock cycle) * + 33 clock cycles within S# LOW (S# becomes HIGH before 34th clock cycle) These sequences cause the controller to set the XIP confirmation bit to 1, thereby terminating XIP. However, it does not reset the device or interrupt PROGRAM/ERASE operations that may be in progress. After terminating XIP, the controller must execute RESET ENABLE and RESET MEMORY to implement a software reset and reset the device. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 73 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Power-Up and Power-Down Power-Up and Power-Down Power-Up and Power-Down Requirements At power-up and power-down, the device must not be selected; that is, S# must follow the voltage applied on V CC until V CC reaches the correct values: V CC,min at power-up and VSS at power-down. To avoid data corruption and inadvertent WRITE operations during power-up, a poweron reset circuit is included. The logic inside the device is held to RESET while V CC is less than the power-on reset threshold voltage shown here; all operations are disabled, and the device does not respond to any instruction. During a standard power-up phase, the device ignores all commands except READ STATUS REGISTER and READ FLAG STATUS REGISTER. These operations can be used to check the memory internal state. After power-up, the device is in standby power mode; the write enable latch bit is reset; the write in progress bit is reset; and the lock registers are configured as: (write lock bit, lock down bit) = (0,0). Normal precautions must be taken for supply line decoupling to stabilize the V CC supply. Each device in a system should have the V CC line decoupled by a suitable capacitor (typically 100nF) close to the package pins. At power-down, when V CC drops from the operating voltage to below the power-on-reset threshold voltage shown here, all operations are disabled and the device does not respond to any command. When the operation is in progress, the program or erase controller bit of the status register is set to 0. To obtain the operation status, the flag status register must be polled once for each die in the device, with S# toggled twice between commands, until each die is ready. When the operation completes, the program or erase controller bit is cleared to 1. The cycle is complete after the flag status register outputs the program or erase controller bit to 1 for each polling operation. Note: If power-down occurs while a WRITE, PROGRAM, or ERASE cycle is in progress, data corruption may result. VPPH must be applied only when V CC is stable and in the V CC,min to V CC,max voltage range. Figure 37: Power-Up Timing VCC VCC,max S# not allowed tVTW = tVTR Device fully accessible VCC,min Chip reset VWI tVTP Polling allowed SPI protocol Starting protocol defined by NVCR WIP = 1 WEL = 0 WIP = 0 WEL = 0 Time 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 74 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Power-Up and Power-Down Table 34: Power-Up Timing and VWI Threshold Note 1 applies to entire table Symbol Parameter Min Max Unit tVTR VCC,min to read - 150 s tVTW VCC,min to device fully accessible - 150 s VWI Write inhibit voltage 1.5 2.5 V tVTP VCC,min to polling allowed - 100 s 1. Parameters listed are characterized only. Note: Power Loss Recovery Sequence If a power loss occurs during a WRITE NONVOLATILE CONFIGURATION REGISTER command, after the next power-on, the device might begin in an undetermined state (XIP mode or an unnecessary protocol). If this occurs, until the next power-up, a recovery sequence must reset the device to a fixed state (extended SPI protocol without XIP). After the recovery sequence, the issue should be resolved definitively by running the WRITE NONVOLATILE CONFIGURATION REGISTER command again. The recovery sequence is composed of two parts that must be run in the correct order. During the entire sequence, tSHSL2 must be at least 50ns. The first part of the sequence is DQ0 (PAD DATA) and DQ3 (PAD HOLD) equal to 1 for the situations listed below: * * * * * * 7 clock cycles within S# LOW (S# becomes HIGH before 8th clock cycle) + 9 clock cycles within S# LOW (S# becomes HIGH before 10th clock cycle) + 13 clock cycles within S# LOW (S# becomes HIGH before 14th clock cycle) + 17 clock cycles within S# LOW (S# becomes HIGH before 18th clock cycle) + 25 clock cycles within S# LOW (S# becomes HIGH before 26th clock cycle) + 33 clock cycles within S# LOW (S# becomes HIGH before 34th clock cycle) The second part of the sequence is exiting from dual or quad SPI protocol by using the following FFh sequence: DQ0 and DQ3 equal to 1 for 8 clock cycles within S# LOW; S# becomes HIGH before 9th clock cycle. After this two-part sequence the extended SPI protocol is active. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 75 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory AC Reset Specifications AC Reset Specifications Table 35: AC RESET Conditions Note 1 applies to entire table Parameter Symbol Reset pulse width Reset recovery time Software reset recovery time S# deselect to reset valid Conditions Min Typ Max Unit 50 - - ns Device deselected (S# HIGH) and is in XIP mode - - 40 ns Device deselected (S# HIGH) and is in standby mode - - 40 ns Commands are being decoded, any READ operations are in progress or any WRITE operation to volatile registers are in progress - - 40 ns Any device array PROGRAM/ERASE/SUSPEND/RESUME, PROGRAM OTP, NONVOLATILE SECTOR LOCK, and ERASE NONVOLATILE SECTOR LOCK ARRAY operations are in progress - - 30 s While a WRITE STATUS REGISTER operation is in progress - tW - ms While a WRITE NONVOLATILE CONFIGURATION REGISTER operation is in progress - tWNVCR - ms On completion or suspension of a SUBSECTOR ERASE operation - tSSE - s Device deselected (S# HIGH) and is in standby mode - - 40 ns Any Flash array PROGRAM/ERASE/SUSPEND/RESUME, PROGRAM OTP, NONVOLATILE SECTOR LOCK, and ERASE NONVOLATILE SECTOR LOCK ARRAY operations are in progress - - 30 s While WRITE STATUS REGISTER operation is in progress - tW - ms While a WRITE NONVOLATILE CONFIGURATION REGISTER operation is in progress - tWNVCR - ms On completion or suspension of a SUBSECTOR ERASE operation - tSSE - s Deselect to reset valid in quad output or in QIO-SPI 2 - - ns tRLRH2 tRHSL tSHSL3 tSHRV Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. Values are guaranteed by characterization; not 100% tested. 2. The device reset is possible but not guaranteed if tRLRH < 50ns. 76 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory AC Reset Specifications Figure 38: Reset AC Timing During PROGRAM or ERASE Cycle S# tSHRH tRHSL tRLRH RESET# Don't Care Figure 39: Reset Enable 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 C Reset enable tSHSL2 tSHSL3 Reset memory S# DQ0 Figure 40: Serial Input Timing tSHSL S# tCHSL tSLCH tCHSH tSHCH C tDVCH tCHDX DQ0 DQ1 tCHCL tCLCH MSB in LSB in High-Z High-Z Don't Care 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 77 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory AC Reset Specifications Figure 41: Hold Timing S# tCHHL tHLCH tHHCH C tHLQZ tCHHH tHHQX DQ0 DQ1 HOLD# Don't Care Figure 42: Output Timing S# tCLQV tCLQV tCLQX tCLQX tCL tCH C tSHQZ DQ0 LSB out DQ1 Address LSB in Don't Care 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 78 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory AC Reset Specifications Figure 43: VPPH Timing End of command (identified by WIP polling) S# C DQ0 tVPPHSL VPPH VPP 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 79 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Absolute Ratings and Operating Conditions Absolute Ratings and Operating Conditions Stresses greater than those listed may cause permanent damage to the device. This is a stress rating only. Exposure to absolute maximum rating for extended periods may adversely affect reliability. Stressing the device beyond the absolute maximum ratings may cause permanent damage. Table 36: Absolute Ratings Symbol Parameter Min Max Units TSTG Storage temperature -65 150 C TLEAD Lead temperature during soldering - See note 1 C 4.0 V Notes VCC Supply voltage -0.6 VPP Fast program/erase voltage -0.2 10 V VIO Input/output voltage with respect to ground -0.6 VCC + 0.6 V 3, 4 VESD Electrostatic discharge voltage (human body model) -2000 2000 V 2 Notes: 1. Compliant with JEDEC Standard J-STD-020C (for small-body, Sn-Pb or Pb assembly), RoHS, and the European directive on Restrictions on Hazardous Substances (RoHS) 2002/95/EU. 2. JEDEC Standard JESD22-A114A (C1 = 100pF, R1 = 1500, R2 = 500). 3. During signal transitions, minimum voltage may undershoot to -1V for periods less than 10ns. 4. During signal transitions, maximum voltage may overshoot to VCC + 1V for periods less than 10ns. Table 37: Operating Conditions Symbol Parameter Min Max Units VCC Supply voltage 2.7 3.6 V VPPH Supply voltage on VPP 8.5 9.5 V Ambient operating temperature -40 85 C TA Table 38: Input/Output Capacitance Note 1 applies to entire table Symbol Description CIN/OUT CIN Input/output capacitance (DQ0/DQ1/DQ2/DQ3) Input capacitance (other pins) Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN Test Condition Min Max Units VOUT = 0V - 8 pF VIN = 0V - 6 pF 1. These parameters are sampled only, not 100% tested. TA = 25C at 54 MHz. 80 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Absolute Ratings and Operating Conditions Table 39: AC Timing Input/Output Conditions Symbol Description CL Load capacitance - Input rise and fall times Min Max Units Notes 30 30 pF 1 - 5 ns Input pulse voltages 0.2VCC to 0.8VCC V Input timing reference voltages 0.3VCC to 0.7VCC V Output timing reference voltages VCC/2 V Notes: VCC/2 2 1. Output buffers are configurable by user. 2. For quad/dual operations: 0V to VCC. Figure 44: AC Timing Input/Output Reference Levels Input levels1 I/O timing reference levels 0.8VCC 0.7VCC 0.5VCC 0.3VCC 0.2VCC Note: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. 0.8VCC = VCC for dual/quad operations; 0.2VCC = 0V for dual/quad operations. 81 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory DC Characteristics and Operating Conditions DC Characteristics and Operating Conditions Table 40: DC Current Characteristics and Operating Conditions Parameter Symbol Input leakage current Test Conditions Min Max Unit - 2 A ILI Output leakage current ILO - 2 A Standby current ICC1 S = VCC, VIN = VSS or VCC - 200 A Operating current (fast-read extended I/O) ICC3 C = 0.1VCC/0.9VCC at 108 MHz, DQ1 = open - 15 mA C = 0.1VCC/0.9VCC at 54 MHz, DQ1 = open - 6 mA Operating current (fast-read dual I/O) C = 0.1VCC/0.9VCC at 108 MHz - 18 mA Operating current (fast-read quad I/O) C = 0.1VCC/0.9VCC at 108 MHz - 20 mA Operating current (program) ICC4 S# = VCC - 20 mA Operating current (write status register) ICC5 S# = VCC - 20 mA Operating current (erase) ICC6 S# = VCC - 20 mA Table 41: DC Voltage Characteristics and Operating Conditions Parameter Symbol Conditions Min Max Unit Input low voltage VIL -0.5 0.3VCC V Input high voltage VIH 0.7VCC VCC + 0.4 V Output low voltage VOL IOL = 1.6mA - 0.4 V Output high voltage VOH IOH = -100A VCC - 0.2 - V 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 82 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory AC Characteristics and Operating Conditions AC Characteristics and Operating Conditions Table 42: AC Characteristics and Operating Conditions Symbol Min Typ1 Max Unit Clock frequency for all commands other than READ (SPI-ER, QIO-SPI protocol) fC DC - 108 MHz Clock frequency for READ commands fR DC - 54 MHz Clock HIGH time tCH 4 - - ns 2 Clock LOW time tCL 4 - - ns 1 Clock rise time (peak-to-peak) tCLCH 0.1 - - V/ns 3, 4 Clock fall time (peak-to-peak) tCHCL 0.1 - - V/ns 3, 4 S# active setup time (relative to clock) tSLCH 4 - - ns S# not active hold time (relative to clock) tCHSL 4 - - ns Data in setup time tDVCH 2 - - ns Data in hold time tCHDX 3 - - ns S# active hold time (relative to clock) tCHSH 4 - - ns S# not active setup time (relative to clock) tSHCH 4 - - ns S# deselect time after a READ command tSHSL1 20 - - ns S# deselect time after a nonREAD command tSHSL2 50 - - ns Output disable time tSHQZ - - 8 ns Clock LOW to output valid under 30pF tCLQV - - 8 ns DTR - - 9 ns STR - - 6 ns DTR - - 7 ns Output hold time (clock LOW) tCLQX 1 - - ns Output hold time (clock HIGH) tCHQX 1 - - ns HOLD command setup time (relative to clock) tHLCH 4 - - ns HOLD command hold time (relative to clock) tCHHH 4 - - ns HOLD command setup time (relative to clock) tHHCH 4 - - ns HOLD command hold time (relative to clock) tCHHL 4 - - ns HOLD command to output Low-Z tHHQX - - 8 ns 3 HOLD command to output High-Z tHLQZ - - 8 ns 3 Write protect setup time tWHSL 20 - - ns 5 Write protect hold time tSHWL 100 - - ns 5 tVPPHSL 200 - - ns 6 Parameter Clock LOW to output valid under 10pF STR Enhanced VPPH HIGH to S# LOW for extended and dual I/O page program WRITE STATUS REGISTER cycle time Write NONVOLATILE CONFIGURATION REGISTER cycle time CLEAR FLAG STATUS REGISTER cycle time 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN tW - 1.3 8 ms tWNVCR - 0.2 3 s tCFSR - 40 - ns 83 Notes 3 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory AC Characteristics and Operating Conditions Table 42: AC Characteristics and Operating Conditions (Continued) Parameter WRITE VOLATILE CONFIGURATION REGISTER cycle time WRITE VOLATILE ENHANCED CONFIGURATION REGISTER cycle time WRITE EXTENDED ADDRESS REGISTER cycle time PAGE PROGRAM cycle time (256 bytes) Symbol Min Typ1 Max Unit tWVCR - 40 - ns tWRVECR - 40 - ns tWREAR - 40 - ns tPP Notes - 0.5 5 ms 7 PAGE PROGRAM cycle time (n bytes) - int(n/8) x 0.0158 5 ms 7 PAGE PROGRAM cycle time, VPP = VPPH ( 256 bytes) - 0.4 5 ms 7 ms 7 PROGRAM OTP cycle time (64 bytes) Subsector ERASE cycle time Sector ERASE cycle time - 0.2 - tSSE - 0.25 0.8 s tSE - 0.7 3 s - 0.6 3 s - 240 480 s - 200 480 s Sector ERASE cycle time (with VPP = VPPH) tBE DIE ERASE cycle time DIE ERASE cycle time (with VPP = VPPH) Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. 2. 3. 4. 5. Typical values given for TA = 25 C. tCH + tCL must add up to 1/fC. Value guaranteed by characterization; not 100% tested. Expressed as a slew-rate. Only applicable as a constraint for a WRITE STATUS REGISTER command when STATUS REGISTER WRITE is set to 1. 6. VPPH should be kept at a valid level until the PROGRAM or ERASE operation has completed and its result (success or failure) is known. 7. When using the PAGE PROGRAM command to program consecutive bytes, optimized timings are obtained with one sequence including all the bytes versus several sequences of only a few bytes (1 < n < 256). 8. int(A) corresponds to the upper integer part of A. For example int(12/8) = 2, int(32/8) = 4 int(15.3) =16. 84 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Package Dimensions Package Dimensions Figure 45: L-PBGA-24b05/6mm x 8mm 0.91 TYP Seating plane A 0.1 A Ball A1 ID 24X O0.40 0.05 5 4 3 2 Ball A1 ID 1 A B C 4.00 8 0.10 D 1.00 TYP E 1.00 TYP 1.30 MAX 4.00 0.20 MIN 6 0.10 Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. All dimensions are in millimeters. 2. See Part Number Ordering Information for complete package names and details. 85 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Package Dimensions Figure 46: SOP2-16/300 mils 10.30 +0.20 16 h x 45 9 0.23 MIN/ 0.32 MAX 10.00 MIN/ 7.50 +0.10 10.65 MAX o 1 0 MIN/ o 8 MAX 8 0.20 +0.1 2.5 +0.15 0.1 0.33 MIN/ 0.51 MAX Z 0.40 MIN/ 1.27 MAX 1.27 TYP Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 1. All dimensions are in millimeters. 2. See Part Number Ordering Information for complete package names and details. 86 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Part Number Ordering Information Part Number Ordering Information Micron Serial NOR Flash devices are available in different configurations and densities. Verify valid part numbers by using Micron's part catalog search at micron.com. To compare features and specifications by device type, visit micron.com/products. Contact the factory for devices not found. For more information on how to identify products and top-side marking by the process identification letter, refer to technical note TN-12-24, "Serial Flash Memory Device Marking for the M25P, M25PE, M25PX, and N25Q Product Families." Table 43: Part Number Information Part Number Category Category Details Notes Device type N25Q = Serial NOR Flash memory, Multiple Input/Output (Single, Dual, Quad I/O), XIP Density 00A = 1Gb Technology A = 65nm Feature set 1 = Byte addressability; HOLD pin; Micron XIP 1 2 = Byte addressability; HOLD pin; Basic XIP 1 3 = Byte addressability; RST# pin; Micron XIP 1 4 = Byte addressability; RST# pin; Basic XIP 1 7 = Byte addressability; HOLD pin; Micron XIP 2 Operating voltage 3 = VCC = 2.7 to 3.6V Block structure G = Uniform (64KB and 4KB) , easy transparent stack Package (RoHS-compliant) 12 = L-PBGA-24b05/6mm x 8mm SF = SOP2-16/300mils Temperature and test flow 4 = IT: -40C to 85C; Device tested with standard test flow A = Automotive temperature range, -40 to 125C; Device tested with high reliability certified test flow H = IT: -40C to 85C; Device tested with high reliability certified test flow Security features 0 = Default Shipping material E = Tray F = Tape and reel G = Tube Notes: 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 3 4 1. Enter 4-byte address mode and exit 4-byte address mode supported. 2. 4-byte addressing mode is the default at power-up. Enter and exit 4-byte addressing mode are not supported. 3. See the table below for additional information. 4. Additional secure options are available upon customer request. 87 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Part Number Ordering Information Table 44: Package Details Micron SPI and JEDEC Package Name Shortened Package Name L-PBGA-24b05/ 6mm x 8mm LBGA 24 Thin, plastic-ball grid array, 24-ball, 6mm x 8mm SOP2-16/300 mil SO16W Small-outline integrated circuit, 16-pin, wide (300 mil) 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN M25P M25P M45PE N25Q M45PE Package Alternate Symbol Symbol Names Package Name Package Description 88 - 12 LBGA24 6 x 8mm L-PBGA-24b05/6x8 MF SF SO16W, SO16 wide 300 mil body width SOIC-16/300 mil, SOP 16L 300 mil Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Revision History Revision History Rev. N - 02/18 * Added Important Notes and Warnings section for further clarification aligning to industry standards Rev. M - 03/14 * In Command Set table, updated value for Quad I/O FAST READ - DTR from 3Dh to 6Dh Rev. L - 01/14 * Corrected RESET ENABLE and RESET MEMORY command timing diagram Rev. K - 09/13 * Replaced TBGA package information with LPBGA package information Rev. J - 07/13 * Removed part numbers from ENTER or EXIT 4-BYTE ADDRESS MODE Command * Removed ENTER or EXIT QUAD Command * Revised Extended Address Register Bit Definitions table Rev. I - 02/13 * * * * Updated the READ ID Operation figure in READ ID Operations Updated ERASE Operations Added link to part number chart in Part Number Ordering Information Updated part numbers in Features Rev. H - 11/12 * Typo fix in Command Set table in Command Definitions - Dual I/O FAST READ - DTR from DBh to BDh Rev. G - 11/12 * Updated Upper and Lower Memory Array Segments figure in Nonvolatile and Volatile Registers Rev. F - 06/12 * Added SOP2-16/300 mils package information * Updated part number in Features * Typo fix in Supported Clock Frequencies - DTR table in Nonvolatile and Volatile Registers * Updated tSSE specification in AC Reset Conditions table 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 89 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved. 1Gb, 3V, Multiple I/O Serial NOR Flash Memory Revision History Rev. E - 02/12 * To Production status Rev. D - 01/12 * Updated AC Reset Specifications to include power-down values Rev. C - 11/11 * Updated Supported Clock Frequencies - STR in Nonvolatile and Volatile Registers Rev. B - 11/11 * Corrected address description from [A24:A25] to A[26:24] in Upper and Lower Memory Array Segments figure; corrected bit 1:0, A24 in Description corrected to A[26:24] of Extended Address Register Bit Definitions table in Nonvolatile and Volatile Registers Rev. A - 08/11 * Initial release 8000 S. Federal Way, P.O. Box 6, Boise, ID 83707-0006, Tel: 208-368-4000 www.micron.com/products/support Sales inquiries: 800-932-4992 Micron and the Micron logo are trademarks of Micron Technology, Inc. All other trademarks are the property of their respective owners. This data sheet contains minimum and maximum limits specified over the power supply and temperature range set forth herein. Although considered final, these specifications are subject to change, as further product development and data characterization sometimes occur. 09005aef8480cede n25q_1gb_3V_65nm.pdf - Rev. N 02/18 EN 90 Micron Technology, Inc. reserves the right to change products or specifications without notice. (c) 2011 Micron Technology, Inc. All rights reserved.