AT24CM01-SSHD-B - MICROCHIP TECHNOLOGY

AT24CM01

I²C-Compatible (Two-Wire)

Serial EEPROM 1‑Mbit (131,072 x 8)

Features

• Low-Voltage and Standard Voltage Operation:

– VCC = 1.7V to 5.5V

– VCC = 2.5V to 5.5V

• Internally Organized as 131,072 x 8 (1M)

• Industrial Temperature Range: -40°C to +85°C

• I2C-Compatible (Two-Wire) Serial Interface:

– 100 kHz Standard mode, 1.7V to 5.5V

– 400 kHz Fast mode, 1.7V to 5.5V

– 1 MHz Fast Mode Plus (FM+), 2.5V to 5.5V

• Schmitt Triggers, Filtered Inputs for Noise Suppression

• Bidirectional Data Transfer Protocol

• Write-Protect Pin for Full Array Hardware Data Protection

• Ultra Low Active Current (3 mA maximum) and Standby Current (6 µA maximum)

• 256-byte Page Write Mode:

– Byte write and partial page writes allowed

• Random and Sequential Read Modes

• Self-Timed Write Cycle:

– All Write operations complete within 5 ms maximum

• Built in Error Detection and Correction

• High Reliability:

– Endurance: 1,000,000 write cycles

– Data retention: 100 years

• Green Package Options (Lead-free/Halide-free/RoHS compliant)

• Die Sale Options: Wafer Form and Bumped Wafers

Packages

• 8-Lead SOIC, 8-Lead SOIJ, 8-Lead TSSOP and 8-Ball WLCSP

Table of Contents

Features.......................................................................................................................... 1

Packages.........................................................................................................................1

1. Package Types (not to scale).................................................................................... 4

2. Pin Descriptions.........................................................................................................5

2.1. Device Address Inputs (A1, A2)................................................................................................... 5

2.2. Ground......................................................................................................................................... 5

2.3. Serial Data (SDA).........................................................................................................................5

2.4. Serial Clock (SCL)........................................................................................................................5

2.5. Write-Protect (WP)....................................................................................................................... 6

2.6. Device Power Supply................................................................................................................... 6

3. Description.................................................................................................................7

3.1. System Configuration Using Two-Wire Serial EEPROMs ........................................................... 7

3.2. Block Diagram.............................................................................................................................. 8

4. Electrical Characteristics........................................................................................... 9

4.1. Absolute Maximum Ratings..........................................................................................................9

4.2. DC and AC Operating Range.......................................................................................................9

4.3. DC Characteristics....................................................................................................................... 9

4.4. AC Characteristics......................................................................................................................10

4.5. Electrical Specifications..............................................................................................................11

5. Device Operation and Communication....................................................................13

5.1. Clock and Data Transition Requirements...................................................................................13

5.2. Start and Stop Conditions.......................................................................................................... 13

5.3. Acknowledge and No-Acknowledge...........................................................................................14

5.4. Standby Mode............................................................................................................................ 14

5.5. Software Reset...........................................................................................................................15

6. Memory Organization.............................................................................................. 16

6.1. Device Addressing..................................................................................................................... 16

7. Write Operations......................................................................................................18

7.1. Byte Write...................................................................................................................................18

7.2. Page Write..................................................................................................................................18

7.3. Acknowledge Polling.................................................................................................................. 19

7.4. Write Cycle Timing..................................................................................................................... 20

7.5. Write Protection..........................................................................................................................20

8. Read Operations..................................................................................................... 21

8.1. Current Address Read................................................................................................................21

8.2. Random Read............................................................................................................................ 21

AT24CM01

8.3. Sequential Read.........................................................................................................................22

9. Device Default Condition from Microchip................................................................ 23

10. Packaging Information.............................................................................................24

10.1. Package Marking Information.....................................................................................................24

11. Revision History.......................................................................................................34

The Microchip Web Site................................................................................................ 35

Customer Change Notification Service..........................................................................35

Customer Support......................................................................................................... 35

Product Identification System........................................................................................36

Microchip Devices Code Protection Feature................................................................. 36

Legal Notice...................................................................................................................37

Trademarks................................................................................................................... 37

Quality Management System Certified by DNV.............................................................38

Worldwide Sales and Service........................................................................................39

AT24CM01

1. Package Types (not to scale)

8-Lead SOIC/SOIJ/TSSOP

(Top View)

NC 1

GND

VCC

SCL

SDA

8-Ball WLCSP

(Top View)

VCC

SDA

SCL A1

A2GND

AT24CM01

Package Types (not to scale)

2. Pin Descriptions

The descriptions of the pins are listed in Table 2-1.

Table 2-1. Pin Function Table

Name 8‑Lead SOIC 8‑Pad SOIJ 8‑Lead TSSOP 8‑Ball WLCSP Function

NC 1 1 1 E1 Not Connected

A1(1)2 2 2 D2 Device Address Input

A2(1)3 3 3 C3 Device Address Input

GND 4 4 4 E3 Ground

SDA 5 5 5 A3 Serial Data

SCL 6 6 6 B2 Serial Clock

WP(1)7 7 7 C1 Write-Protect

VCC 8 8 8 A1 Device Power Supply

Note:

1. If the A2, A1 or WP pins are not driven, they are internally pulled down to GND. In order to operate

in a wide variety of application environments, the pull-down mechanism is intentionally designed to

be somewhat strong. Once these pins are biased above the CMOS input buffer’s trip point

(~0.5 x VCC), the pull‑down mechanism disengages. Microchip recommends connecting these pins

to a known state whenever possible.

2.1 Device Address Inputs (A1, A2)

The A1 and A2 pins are device address inputs that are hardwired (directly to GND or to VCC) for

compatibility with other two-wire Serial EEPROM devices. When the pins are hardwired, as many as four

devices may be addressed on a single bus system. A device is selected when a corresponding hardware

and software match is true. If these pins are left floating, the A1 and A2 pins will be internally pulled down

to GND. However, due to capacitive coupling that may appear in customer applications, Microchip

recommends always connecting the address pins to a known state. When using a pull-up resistor,

Microchip recommends using 10 kΩ or less.

2.2 Ground

The ground reference for the power supply. GND should be connected to the system ground.

2.3 Serial Data (SDA)

The SDA pin is an open-drain bidirectional input/output pin used to serially transfer data to and from the

device. The SDA pin must be pulled high using an external pull-up resistor (not to exceed 10 kΩ in value)

and may be wire-ORed with any number of other open-drain or open-collector pins from other devices on

the same bus.

2.4 Serial Clock (SCL)

The SCL pin is used to provide a clock to the device and to control the flow of data to and from the

device. Command and input data present on the SDA pin is always latched in on the rising edge of SCL,

while output data on the SDA pin is clocked out on the falling edge of SCL. The SCL pin must either be

forced high when the serial bus is idle or pulled high using an external pull-up resistor.

AT24CM01

Pin Descriptions

2.5 Write-Protect (WP)

The write-protect input, when connected to GND, allows normal write operations. When the WP pin is

connected directly to VCC, all write operations to the protected memory are inhibited.

If the pin is left floating, the WP pin will be internally pulled down to GND. However, due to capacitive

coupling that may appear in customer applications, Microchip recommends always connecting the WP

pin to a known state. When using a pull‑up resistor, Microchip recommends using 10 kΩ or less.

Table 2-2. Write-Protect

WP Pin Status Part of the Array Protected

At VCC Full Array

At GND Normal Write Operations

2.6 Device Power Supply

The VCC pin is used to supply the source voltage to the device. Operations at invalid VCC voltages may

produce spurious results and should not be attempted.

AT24CM01

Pin Descriptions

3. Description

The AT24CM01 provides 1,048,576 bits of Serial Electrically Erasable and Programmable Read-Only

Memory (EEPROM) organized as 131,072 words of eight bits each. The device’s cascading feature

allows up to four devices to share a common two-wire bus. This device is optimized for use in many

industrial and commercial applications where low-power and low-voltage operations are essential. The

device is available in space-saving 8-lead SOIC, 8-Lead TSSOP, 8-Lead SOIJ and 8-ball WLCSP

packages. All packages operate from 1.7V to 5.5V.

3.1 System Configuration Using Two-Wire Serial EEPROMs

I2C Bus Master:

Microcontroller

Slave 0

AT24CXXX

VCC

SDA

SCL

GND

VCC

GND

SCL

SDA

RPUP(max) = tR(max)

0.8473 x CL

RPUP(min) = VCC - VOL(max)

IOL

Slave 1

AT24CXXX

VCC

SDA

SCL

GND

Slave 3

AT24CXXX

VCC

SDA

SCL

GND

VCC

AT24CM01

Description

3.2 Block Diagram

1 page

Start

Stop

Detector

GND

Memory

System Control

Module

High-Voltage

Generation Circuit

Data & ACK

Input/Output Control

Address Register

and Counter

Write

Protection

Control

DOUT

DIN

Hardware

Address

Comparator VCC

SCL

SDA

Power-on

Reset

Generator

EEPROM Array

Column Decoder

Row Decoder

Data Register

AT24CM01

Description

4. Electrical Characteristics

4.1 Absolute Maximum Ratings

Temperature under bias -55°C to +125°C

Storage temperature -65°C to +150°C

VCC 6.25V

Voltage on any pin with respect to ground -1.0V to +7.0V

DC output current 5.0 mA

ESD protection >3 kV

Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to

the device. This is a stress rating only and functional operation of the device at these or any other

conditions above those indicated in the operation listings of this specification is not implied. Exposure to

absolute maximum rating conditions for extended periods may affect device reliability.

4.2 DC and AC Operating Range

Table 4-1. DC and AC Operating Range

AT24CM01

Operating Temperature (Case) Industrial Temperature Range -40°C to +85°C

VCC Power Supply Low-Voltage Grade 1.7V to 5.5V

4.3 DC Characteristics

Table 4-2. DC Characteristics

Parameter Symbol Minimum Typical(1)Maximum Units Test Conditions

Supply Voltage,

1.7V Option

VCC1 1.7 — 5.5 V

Supply Voltage,

2.5V Option

VCC2 2.5 — 5.5 V

Supply Current ICC — — 2.0 mA VCC = 5.0V, Read at

400 kHz

— — 3.0 mA VCC = 5.0V, Write at

400 kHz

AT24CM01

Electrical Characteristics

...........continued

Parameter Symbol Minimum Typical(1)Maximum Units Test Conditions

Standby Current ISB — — 1.0 μA VCC = 1.7V, VIN = VCC

or VSS

— — 2.0 μA VCC = 2.5V, VIN = VCC

or VSS

— — 3.0 μA VCC = 3.6V, VIN = VCC

or VSS

— — 6.0 μA VCC = 5.5V, VIN = VCC

or VSS

Input Leakage

Current

ILI — 0.10 3.0 μA VIN = VCC or VSS

Output Leakage

Current

ILO — 0.05 3.0 μA VOUT = VCC or VSS

Input Low Level VIL -0.6 — VCC x 0.3 V Note 2

Input High Level VIH VCC x 0.7 — VCC + 0.5 V Note 2

Output Low Level VOL1 — — 0.2 V VCC = 1.7V, IOL =

0.15 mA

Output Low Level VOL2 — — 0.4 V VCC = 3.0V, IOL =

2.1 mA

Note:

1. Typical values characterized at TA = +25°C unless otherwise noted.

2. This parameter is characterized but is not 100% tested in production.

4.4 AC Characteristics

Table 4-3. AC Characteristics(1)

Parameter Symbol Fast Mode Fast Mode Plus Units

VCC = 1.7V to 5.5V VCC = 2.5V to 5.5V

Min. Max. Min. Max.

Clock Frequency, SCL fSCL — 400 — 1000 kHz

Clock Pulse Width Low tLOW 1,300 — 500 — ns

Clock Pulse Width High tHIGH 600 — 400 — ns

Input Filter Spike

Suppression (SCL,SDA)(2)

tI— 100 — 50 ns

Clock Low to Data Out Valid tAA 50 900 50 450 ns

Bus Free Time between

Stop and Start(2)

tBUF 1,300 — 500 — ns

Start Hold Time tHD.STA 600 — 250 — ns

Start Set-up Time tSU.STA 600 — 250 — ns

AT24CM01

Electrical Characteristics

...........continued

Parameter Symbol Fast Mode Fast Mode Plus Units

VCC = 1.7V to 5.5V VCC = 2.5V to 5.5V

Min. Max. Min. Max.

Data In Hold Time tHD.DAT 0 — 0 — ns

Data In Set-up Time tSU.DAT 100 — 100 — ns

Inputs Rise Time(2)tR— 300 — 300 ns

Inputs Fall Time(2)tF— 300 — 100 ns

Stop Condition Set-up Time tSU.STO 600 — 250 — ns

Data Out Hold Time tDH 50 — 50 — ns

Write Cycle Time tWR — 5 — 5 ms

Note:

1. AC measurement conditions:

– CL: 100 pF

– RPUP (SDA bus line pull-up resistor to VCC): 1.3 kΩ (1000 kHz), 4 kΩ (400 kHz)

– Input pulse voltages: 0.3 x VCC to 0.7 x VCC

– Input rise and fall times: ≤50 ns

– Input and output timing reference voltages: 0.5 x VCC

2. These parameters are determined through product characterization and are not 100% tested in

production.

Figure 4-1. Bus Timing

SCL

SDA In

SDA Out

tHIGH

tLOW

tDH

tAA tBUF

tSU.STO

tSU.DAT

tHD.DAT

tHD.STA

tSU.STA

4.5 Electrical Specifications

4.5.1 Power-Up Requirements and Reset Behavior

During a power-up sequence, the VCC supplied to the AT24CM01 should monotonically rise from GND to

the minimum VCC level, as specified in Table 4-1, with a slew rate no faster than 0.1 V/µs.

4.5.1.1 Device Reset

To prevent inadvertent write operations or any other spurious events from occurring during a power-up

sequence, the AT24CM01 includes a Power-on Reset (POR) circuit. Upon power-up, the device will not

AT24CM01

Electrical Characteristics

respond to any commands until the VCC level crosses the internal voltage threshold (VPOR) that brings the

device out of Reset and into Standby mode.

The system designer must ensure the instructions are not sent to the device until the VCC supply has

reached a stable value greater than or equal to the minimum VCC level. Additionally, once the VCC is

greater than or equal to the minimum VCC level, the bus master must wait at least tPUP before sending the

first command to the device. See Table 4-4 for the values associated with these power-up parameters.

Table 4-4. Power-Up Conditions(1)

Symbol Parameter Min. Max. Units

tPUP Time required after VCC is stable before the device can accept commands 100 －µs

VPOR Power-on Reset Threshold Voltage －1.5 V

tPOFF Minimum time at VCC = 0V between power cycles 500 －ms

Note:

1. These parameters are characterized but they are not 100% tested in production.

If an event occurs in the system where the VCC level supplied to the AT24CM01 drops below the

maximum VPOR level specified, it is recommended that a full-power cycle sequence be performed by first

driving the VCC pin to GND, waiting at least the minimum tPOFF time and then performing a new power-up

sequence in compliance with the requirements defined in this section.

4.5.2 Pin Capacitance

Table 4-5. Pin Capacitance(1)

Symbol Test Condition Max. Units Conditions

CI/O Input/Output Capacitance (SDA) 8 pF VI/O = 0V

CIN Input Capacitance (A0, A1, A2 and SCL) 6 pF VIN = 0V

Note:

1. This parameter is characterized but is not 100% tested in production.

4.5.3 EEPROM Cell Performance Characteristics

Table 4-6. EEPROM Cell Performance Characteristics

Operation Test Condition Min. Max. Units

Write Endurance(1)TA = 25°C, VCC = 3.3V,

Page Write mode

1,000,000 — Write Cycles

Data Retention(1)TA = 55°C 100 — Years

Note:

1. Performance is determined through characterization and the qualification process.

AT24CM01

Electrical Characteristics

5. Device Operation and Communication

The AT24CM01 operates as a slave device and utilizes a simple I2C-compatible two-wire digital serial

interface to communicate with a host controller, commonly referred to as the bus master. The master

initiates and controls all read and write operations to the slave devices on the serial bus, and both the

master and the slave devices can transmit and receive data on the bus.

The serial interface is comprised of just two signal lines: Serial Clock (SCL) and Serial Data (SDA).

The SCL pin is used to receive the clock signal from the master, while the bidirectional SDA pin is used to

receive command and data information from the master as well as to send data back to the master.

Data is always latched into the AT24CM01 on the rising edge of SCL and always output from the device

on the falling edge of SCL. Both the SCL and SDA pins incorporate integrated spike suppression filters

and Schmitt Triggers to minimize the effects of input spikes and bus noise.

All command and data information is transferred with the Most Significant bit (MSb) first. During bus

communication, one data bit is transmitted every clock cycle, and after eight bits (one byte) of data have

been transferred, the receiving device must respond with either an Acknowledge (ACK) or a

No-Acknowledge (NACK) response bit during a ninth clock cycle (ACK/NACK clock cycle) generated by

the master. Therefore, nine clock cycles are required for every one byte of data transferred. There are no

unused clock cycles during any read or write operation, so there must not be any interruptions or breaks

in the data stream during each data byte transfer and ACK or NACK clock cycle.

During data transfers, data on the SDA pin must only change while SCL is low, and the data must remain

stable while SCL is high. If data on the SDA pin changes while SCL is high, then either a Start or a Stop

condition will occur. Start and Stop conditions are used to initiate and end all serial bus communication

between the master and the slave devices. The number of data bytes transferred between a Start and a

Stop condition is not limited and is determined by the master. In order for the serial bus to be idle, both

the SCL and SDA pins must be in the logic high state at the same time.

5.1 Clock and Data Transition Requirements

The SDA pin is an open-drain terminal and therefore must be pulled high with an external pull‑up resistor.

SCL is an input pin that can either be driven high or pulled high using an external pull‑up resistor. Data on

the SDA pin may change only during SCL low time periods. Data changes during SCL high periods will

indicate a Start or Stop condition as defined below. The relationship of the AC timing parameters with

respect to SCL and SDA for the AT24CM01 are shown in the timing waveform in Figure 4-1. The AC

timing characteristics and specifications are outlined in AC Characteristics.

5.2 Start and Stop Conditions

5.2.1 Start Condition

A Start condition occurs when there is a high-to-low transition on the SDA pin while the SCL pin is at a

stable logic ‘1’ state and will bring the device out of Standby mode. The master uses a Start condition to

initiate any data transfer sequence; therefore, every command must begin with a Start condition.

The device will continuously monitor the SDA and SCL pins for a Start condition but will not respond

unless one is detected. Refer to Figure 5-1 for more details.

5.2.2 Stop Condition

A Stop condition occurs when there is a low-to-high transition on the SDA pin while the SCL pin is stable

in the logic ‘1’ state.

AT24CM01

Device Operation and Communication

The master can use the Stop condition to end a data transfer sequence with the AT24CM01, which will

subsequently return to Standby mode. The master can also utilize a repeated Start condition instead of a

Stop condition to end the current data transfer if the master will perform another operation. Refer to

Figure 5-1 for more details.

5.3 Acknowledge and No-Acknowledge

After every byte of data is received, the receiving device must confirm to the transmitting device that it

has successfully received the data byte by responding with what is known as an Acknowledge (ACK).

An ACK is accomplished by the transmitting device first releasing the SDA line at the falling edge of the

eighth clock cycle followed by the receiving device responding with a logic ‘0’ during the entire high period

of the ninth clock cycle.

When the AT24CM01 is transmitting data to the master, the master can indicate that it is done receiving

data and wants to end the operation by sending a logic ‘1’ response to the AT24CM01 instead of an ACK

response during the ninth clock cycle. This is known as a No-Acknowledge (NACK) and is accomplished

by the master sending a logic ‘1’ during the ninth clock cycle, at which point the AT24CM01 will release

the SDA line so the master can then generate a Stop condition.

The transmitting device, which can be the bus master or the Serial EEPROM, must release the SDA line

at the falling edge of the eighth clock cycle to allow the receiving device to drive the SDA line to a logic ‘0’

to ACK the previous 8-bit word. The receiving device must release the SDA line at the end of the ninth

clock cycle to allow the transmitter to continue sending new data. A timing diagram has been provided in

Figure 5-1 to better illustrate these requirements.

Figure 5-1. Start Condition, Data Transitions, Stop Condition and Acknowledge

SCL

SDA

Must Be

Stable

SDA

Change

Allowed

SDA

Change

Allowed

Acknowledge

Valid

Stop

Condition

Start

Condition

1 2 8 9

SDA

Must Be

Stable Acknowledge Window

The transmitting device (Master or Slave)

must release the SDA line at this point to allow

the receiving device (Master or Slave) to drive the

SDA line low to ACK the previous 8-bit word.

The receiver (Master or Slave)

must release the SDA line at

this point to allow the transmitter

to continue sending new data.

5.4 Standby Mode

The AT24CM01 features a low-power Standby mode that is enabled when any one of the following

occurs:

• A valid power-up sequence is performed (see Power-Up Requirements and Reset Behavior).

• A Stop condition is received by the device unless it initiates an internal write cycle (see Write

Operations).

• At the completion of an internal write cycle (see Write Operations).

AT24CM01

Device Operation and Communication

5.5 Software Reset

After an interruption in protocol, power loss or system Reset, any two‑wire device can be protocol reset

by clocking SCL until SDA is released by the EEPROM and goes high. The number of clock cycles until

SDA is released by the EEPROM will vary. The software Reset sequence should not take more than nine

dummy clock cycles. Once the software Reset sequence is complete, new protocol can be sent to the

device by sending a Start condition followed by the protocol. Refer to Figure 5-2 for an illustration.

Figure 5-2. Software Reset

SCL 9

Device is

8321

SDA

Dummy Clock Cycles

SDA Released

Software Reset

by EEPROM

In the event that the device is still non-responsive or remains active on the SDA bus, a power cycle must

be used to reset the device (see Power-Up Requirements and Reset Behavior).

AT24CM01

Device Operation and Communication

6. Memory Organization

The AT24CM01 is internally organized as 512 pages of 256 bytes each.

6.1 Device Addressing

Accessing the device requires an 8-bit device address byte following a Start condition to enable the

device for a read or write operation. Since multiple slave devices can reside on the serial bus, each slave

device must have its own unique address so the master can access each device independently.

The Most Significant four bits of the device address byte is referred to as the device type identifier. The

device type identifier ‘1010’ (Ah) is required in bits 7 through 4 of the device address byte (see

Table 6‑1).

Following the 4-bit device type identifier are the hardware slave address bits, A2 and A1. These bits can

be used to expand the address space by allowing up to four Serial EEPROM devices on the same bus.

The A2 and A1 values must correlate with the voltage level on the corresponding hardwired device

address input pins A2 and A1. The A2 and A1 pins use an internal proprietary circuit that automatically

biases it to a logic ‘0’ state if the pin is allowed to float. In order to operate in a wide variety of application

environments, the pull‑down mechanism is intentionally designed to be somewhat strong. Once these

pins are biased above the CMOS input buffer’s trip point (~0.5 x VCC), the pull-down mechanism

disengages. Microchip recommends connecting the A2 and A1 pin to a known state whenever possible.

Following the A2 and A1 hardware slave address bits is bit A16 (bit 1 of the device address byte), which

is the Most Significant bit of the memory array word address. Refer to Table 6-1 to review the bit position.

The eighth bit (bit 0) of the device address byte is the Read/Write Select bit. A read operation is initiated if

this bit is high and a write operation is initiated if this bit is low.

Upon the successful comparison of the device address byte, the AT24CM01 will return an ACK. If a valid

comparison is not made, the device will NACK.

Table 6-1. Device Addressing

Package Device Type Identifier Hardware Slave

Address Bits

Most Significant Bit

of the Word

Address

R/W Select

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

SOIC, SOIJ,

TSSOP,

WLCSP

1010 A2 A1 A16 R/W

For all operations except the current address read, two 8‑bit word address bytes must be transmitted to

the device immediately following the device address byte. The word address bytes consist of the

remaining 16 bits of the 17-bit memory array word address, and are used to specify which byte location in

the EEPROM to start reading or writing.

The first word address byte contains the next eight bits of the word address (A15 through A8) in bit

positions seven through zero, as seen in Table 6-2. Upon completion of the first word address byte, the

AT24CM01 will return an ACK.

AT24CM01

Memory Organization

Table 6-2. First Word Address Byte

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

A15 A14 A13 A12 A11 A10 A9 A8

Next, the second word address byte is sent to the device which provides the remaining eight bits of the

word address (A7 through A0). Upon completion of the second word address byte, the AT24CM01 will

return an ACK. See Table 6-3 to review these bit positions.

Table 6-3. Second Word Address Byte

Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0

A7 A6 A5 A4 A3 A2 A1 A0

AT24CM01

Memory Organization

7. Write Operations

All write operations for the AT24CM01 begin with the master sending a Start condition, followed by a

device address byte with the R/W bit set to logic ‘0’, and then by the word address byte. The data

value(s) to be written to the device immediately follow the word address byte.

7.1 Byte Write

The AT24CM01 supports the writing of a single 8-bit byte. Selecting a data word in the AT24CM01

requires 17-bit word address.

Upon receipt of the proper device address and the word address bytes, the EEPROM will send an

Acknowledge. The device will then be ready to receive the 8-bit data word. Following receipt of the 8‑bit

data word, the EEPROM will respond with an ACK. The addressing device, such as a bus master, must

then terminate the write operation with a Stop condition. At that time, the EEPROM will enter an internally

self-timed write cycle, which will be completed within tWR, while the data word is being programmed into

the nonvolatile EEPROM. All inputs are disabled during this write cycle, and the EEPROM will not

respond until the write is complete.

Figure 7-1. Byte Write

SCL

SDA

Start Condition

by Master

Device Address Byte First Word Address Byte

MSB MSB

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

1 0 1 0 A2 A1 A16 0 0

Second Word Address Byte Data Word

Stop Condition

by Master

MSB MSB

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

D7 D6 D5 D4 D3 D2 D1 D0 0

A14 A13 A12 A11 A10 A9 A8 0

ACK

from Slave

ACK

from Slave

ACK

from Slave

ACK

from Slave

A7 A6 A5 A4 A3 A2 A1 A0 0

A15

7.2 Page Write

A page write operation allows up to 256 bytes to be written in the same write cycle, provided all bytes are

in the same row of the memory array (where address bits A16 through A8 are the same). Partial page

writes of less than 256 bytes are also allowed.

A page write is initiated the same way as a byte write, but the bus master does not send a Stop condition

after the first data word is clocked in. Instead, after the EEPROM acknowledges receipt of the first data

word, the bus master can transmit up to 255 additional data words. The EEPROM will respond with an

ACK after each data word is received. Once all data to be written has been sent to the device, the bus

master must issue a Stop condition (see Figure 7-2) at which time the internally self-timed write cycle will

begin.

The lower eight bits of the word address are internally incremented following the receipt of each data

word. The higher order address bits are not incremented and retain the memory page row location. Page

AT24CM01

Write Operations

write operations are limited to writing bytes within a single physical page, regardless of the number of

bytes actually being written. When the incremented word address reaches the page boundary, the

address counter will rollover to the beginning of the same page. Nevertheless, creating a rollover event

should be avoided as previously loaded data in the page could become unintentionally altered.

Figure 7-2. Page Write

SCL

SDA

Start Condition

by Master ACK

from Slave

ACK

from Slave

Device Address Byte First Word Address Byte

MSB MSB

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

1 0 1 0 A2 A1 A16 0 0 A15 A14 A13 A12 A11 A10 A9 A8 0

ACK

from Slave

ACK

from Slave

Stop Condition

by Master

ACK

from Slave

Second Word Address Byte Data Word (n) Data Word (n+x), max of 256 without rollover

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

A7 A6 A5 A4 A3 A2 A1 A0 0 D7 D6 D5 D4 D3 D2 D1 D0 0 D7 D6 D5 D4 D3 D2 D1 D0 0

MSB MSB MSB

7.3 Acknowledge Polling

An Acknowledge Polling routine can be implemented to optimize time-sensitive applications that would

prefer not to wait the fixed maximum write cycle time (tWR). This method allows the application to know

immediately when the Serial EEPROM write cycle has completed, so a subsequent operation can be

started.

Once the internally self-timed write cycle has started, an Acknowledge Polling routine can be initiated.

This involves repeatedly sending a Start condition followed by a valid device address byte with the R/W

bit set at logic ‘0’. The device will not respond with an ACK while the write cycle is ongoing. Once the

internal write cycle has completed, the EEPROM will respond with an ACK, allowing a new read or write

operation to be immediately initiated. A flowchart has been included below in Figure 7-3 to better illustrate

this technique.

Figure 7-3. Acknowledge Polling Flowchart

Did

the device

ACK?

Send any

Write

protocol.

Send

Stop

condition

to initiate the

Write cycle.

Send Start

condition followed

by a valid

Device Address

byte with R/W = 0.

Proceed to

next Read or

Write operation.

YES

AT24CM01

Write Operations

7.4 Write Cycle Timing

The length of the self-timed write cycle (tWR) is defined as the amount of time from the Stop condition that

begins the internal write cycle to the Start condition of the first device address byte sent to the AT24CM01

that it subsequently responds to with an ACK. Figure 7-4 has been included to show this measurement.

During the internally self-timed write cycle, any attempts to read from or write to the memory array will not

be processed.

Figure 7-4. Write Cycle Timing

tWR

Stop

Condition

Start

Condition

Data Word n

ACKD0

SDA

Stop

Condition

SCL 8 9

ACK

First Acknowledge from the device

to a valid device address sequence after

write cycle is initiated. The minimum tWR

can only be determined through

the use of an ACK Polling routine.

7.5 Write Protection

The AT24CM01 utilizes a hardware data protection scheme that allows the user to write‑protect the entire

memory contents when the WP pin is at VCC (or a valid VIH). No write protection will be set if the WP pin

is at GND or left floating.

Table 7-1. AT24CM01 Write-Protect Behavior

WP Pin Voltage Part of the Array Protected

VCC Full Array

GND None － Write Protection Not Enabled

The status of the WP pin is sampled at the Stop condition for every byte write or page write operation

prior to the start of an internally self‑timed write cycle. Changing the WP pin state after the Stop condition

has been sent will not alter or interrupt the execution of the write cycle.

If an attempt is made to write to the device while the WP pin has been asserted, the device will

acknowledge the device address, word address and data bytes, but no write cycle will occur when the

Stop condition is issued. The device will immediately be ready to accept a new read or write command.

AT24CM01

Write Operations

8. Read Operations

Read operations are initiated the same way as write operations with the exception that the Read/Write

Select bit in the device address byte must be a logic ‘1’. There are three read operations:

• Current Address Read

• Random Address Read

• Sequential Read

8.1 Current Address Read

The internal data word address counter maintains the last address accessed during the last read or write

operation, incremented by one. This address stays valid between operations as long as the VCC is

maintained to the part. The address roll-over during a read is from the last byte of the last page to the first

byte of the first page of the memory.

A current address read operation will output data according to the location of the internal data word

address counter. This is initiated with a Start condition, followed by a valid device address byte with the

R/W bit set to logic ‘1’. The device will ACK this sequence and the current address data word is serially

clocked out on the SDA line. All types of read operations will be terminated if the bus master does not

respond with an ACK (it NACKs) during the ninth clock cycle. After the NACK response, the master may

send a Stop condition to complete the protocol, or it can send a Start condition to begin the next

sequence.

Figure 8-1. Current Address Read

SCL

SDA

Device Address Byte Data Word (n)

Start

Master

ACK

from

Slave

NACK

from

Master

Stop

Master

MSB MSB

1 0 1 0 A2 A1 A16 1 0 D7 D6 D5 D4 D3 D2 D1 D0 1

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

8.2 Random Read

A random read begins in the same way as a byte write operation does to load in a new data word

address. This is known as a “dummy write” sequence; however, the data byte and the Stop condition of

the byte write must be omitted to prevent the part from entering an internal write cycle. Once the device

address and word address are clocked in and acknowledged by the EEPROM, the bus master must

generate another Start condition. The bus master now initiates a current address read by sending a Start

condition, followed by a valid device address byte with the R/W bit set to logic ‘1’. The EEPROM will ACK

the device address and serially clock out the data word on the SDA line. All types of read operations will

be terminated if the bus master does not respond with an ACK (it NACKs) during the ninth clock cycle.

After the NACK response, the master may send a Stop condition to complete the protocol, or it can send

a Start condition to begin the next sequence.

AT24CM01

Read Operations

Figure 8-2. Random Read

SCL

SDA

Start Condition

by Master

Device Address Byte First Word Address Byte

MSB MSB

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

1 0 1 0 A2 A1 A16 0 0

Dummy Write

Start Condition

by Master

Device Address Byte Data Word (n)

Stop Condition

by Master

MSB MSB

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

1 0 1 0 A2 A1

A16 1 0 D7 D6 D5 D4 D3 D2 D1 D0 1

A14 A13 A12 A11 A10 A9 A8 0

ACK

from Slave

ACK

from Slave

ACK

from Slave

NACK

from Master

Second Word Address Byte

MSB

A7 A6 A5 A4 A3 A2 A1 A0 0

ACK

from Slave

A15

8.3 Sequential Read

Sequential reads are initiated by either a current address read or a random read. After the bus master

receives a data word, it responds with an Acknowledge. As long as the EEPROM receives an ACK, it will

continue to increment the word address and serially clock out sequential data words. When the maximum

memory address is reached, the data word address will roll-over and the sequential read will continue

from the beginning of the memory array. All types of read operations will be terminated if the bus master

does not respond with an ACK (it NACKs) during the ninth clock cycle. After the NACK response, the

master may send a Stop condition to complete the protocol, or it can send a Start condition to begin the

next sequence.

Figure 8-3. Sequential Read

SCL

SDA

Start

Master

ACK

from

Slave

ACK

from

Master

Device Address Byte Data Word (n)

MSB MSB

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

1 0 1 0 A2 A1 A16 1 0 D7 D6 D5 D4 D3 D2 D1 D0 0

ACK

from

Master

NACK

from

Master

Stop

Master

ACK

from

Master

Data Word (n+1) Data Word (n+2) Data Word (n+x)

1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9

D7 D6 D5 D4 D3 D2 D1 D0 0 D7 D6 D5 D4 D3 D2 D1 D0 0 D7 D6 D5 D4 D3 D2 D1 D0 1

MSB MSB MSB

AT24CM01

Read Operations

9. Device Default Condition from Microchip

The AT24CM01 is delivered with the EEPROM array set to logic ‘1’, resulting in FFh data in all locations.

AT24CM01

Device Default Condition from Microchip

10. Packaging Information

10.1 Package Marking Information

YYWWNNN

###% CO

ATMLHYWW

8-lead SOIC

8-lead TSSOP

YYWWNNN

###%CO

ATHYWW

8-ball WLCSP

Note 2: Package drawings are not to scale

Note 1: designates pin 1

AT24CM01: Package Marking Information

Catalog Number Truncation

AT24CM01 Truncation Code ###: 2G

Date Codes Voltages

Y = Year M = Month WW = Work Week of Assembly % = Minimum Voltage

4: 2014 8: 2018 A: January 02: Week 2 D: 2.5V min

5: 2015 9: 2019 B: February 04: Week 4 M: 1.7V min

6: 2016 0: 2020 ... ...

7: 2017 1: 2021 L: December 52: Week 52

Country of Assembly Device Grade Atmel Truncation

CO = Country of Origin H or U: Industrial Grade AT: Atmel

ATM: Atmel

ATML: Atmel

Lot Number or Trace Code

NNN = Alphanumeric Trace Code (2 Characters for Small Packages)

###

NNN

8-lead SOIJ

YYWWNNN

###% CO

ATMLHYWW

AT24CM01

Packaging Information

0.25 CA–B D

SEATING

PLANE

TOP VIEW

SIDE VIEW

VIEW A–A

0.10 C

Microchip Technology Drawing No. C04-057-SN Rev D Sheet 1 of 2

For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

Note:

8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC]

NOTE 5

NX b

0.10 CA–B

H0.23

(L1)

R0.13

VIEW C

SEE VIEW C

NOTE 1

AT24CM01

Packaging Information

Microchip Technology Drawing No. C04-057-SN Rev D Sheet 2 of 2

8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm (.150 In.) Body [SOIC]

For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

Note:

Foot Angle 0° - 8°

15°-5°

Mold Draft Angle Bottom

15°-5°

Mold Draft Angle Top

0.51-0.31

Lead Width

0.25-0.17

Lead Thickness

1.27-0.40LFoot Length

0.50-0.25hChamfer (Optional)

4.90 BSCDOverall Length

3.90 BSCE1Molded Package Width

6.00 BSCEOverall Width

0.25-0.10

Standoff

--1.25A2Molded Package Thickness

1.75--AOverall Height

1.27 BSC

Pitch

8NNumber of Pins

MAXNOMMINDimension Limits

MILLIMETERSUnits

protrusions shall not exceed 0.15mm per side.

3. Dimensions D and E1 do not include mold flash or protrusions. Mold flash or

REF: Reference Dimension, usually without tolerance, for information purposes only.

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

1. Pin 1 visual index feature may vary, but must be located within the hatched area.

2. § Significant Characteristic

4. Dimensioning and tolerancing per ASME Y14.5M

Notes:

Footprint L1 1.04 REF

5. Datums A & B to be determined at Datum H.

AT24CM01

Packaging Information

RECOMMENDED LAND PATTERN

Microchip Technology Drawing C04-2057-SN Rev B

8-Lead Plastic Small Outline (SN) - Narrow, 3.90 mm Body [SOIC]

BSC: Basic Dimension. Theoretically exact value shown without tolerances.

Notes:

Dimensioning and tolerancing per ASME Y14.5M1.

For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

Note:

Dimension Limits

Units

CContact Pad Spacing

Contact Pitch

MILLIMETERS

1.27 BSC

MIN

MAX

5.40

Contact Pad Length (X8)

Contact Pad Width (X8)

1.55

0.60

NOM

SILK SCREEN

AT24CM01

Packaging Information

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

AT24CM01

Packaging Information

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

AT24CM01

Packaging Information

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

AT24CM01

Packaging Information

/HDG3ODVWLF7KLQ6KULQN6PDOO2XWOLQH67±PP%RG\>76623@

1RWHV

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 'LPHQVLRQLQJDQGWROHUDQFLQJSHU$60(<0

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KWWSZZZPLFURFKLSFRPSDFNDJLQJ

8QLWV 0,//,0(7(56

'LPHQVLRQ/LPLWV 0,1 120 0$;

1XPEHURI3LQV 1 

3LWFK H %6&

2YHUDOO+HLJKW $ ± ± 

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6WDQGRII $  ± 

2YHUDOO:LGWK ( %6&

0ROGHG3DFNDJH:LGWK (   

0ROGHG3DFNDJH/HQJWK '   

)RRW/HQJWK /   

)RRWSULQW / 5()

)RRW$QJOH  ± 

/HDG7KLFNQHVV F  ± 

/HDG:LGWK E  ± 

NOTE 1

L1 L

0LFURFKLS 7HFKQRORJ\ 'UDZLQJ &%

AT24CM01

Packaging Information

Note: For the most current package drawings, please see the Microchip Packaging Specification located at

http://www.microchip.com/packaging

AT24CM01

Packaging Information

DRAWING NO. REV. TITLE GPC

8U-6 B

4/25/13

8U-6, 8-ball (3x5 Array) Wafer Level Chip Scale

Package (WLCSP) GHZ

COMMON DIMENSIONS

(Unit of Measure = mm)

SYMBOL MIN TYP MAX NOTE

A 0.460 0.499 0.538

A1 0.164 - 0.224

A2 0.280 0.305 0.330

E Contact Microchip for details

e 0.866

e2 0.500

d 1.000

d2 0.500

Contact Sales for details

b 0.239 0.269 0.299

TOP VIEW SIDE VIEW BALL SIDE

Pin Assignment Matrix

A B C D E

VCC

SDA

Øb

Pin 1

AE C

SCL A1

GND

A ECB D

d0.015 C

4X d0.075 C

Cjn0.015mC

jn0.05mC A B

* Dimensions are NOT to scale.

Note: For the most current package drawings, please see the Microchip Packaging Specification located

at http://www.microchip.com/packaging.

AT24CM01

Packaging Information

11. Revision History

Revision A (March 2019)

Updated to Microchip template. Microchip DS20006170 replaces Atmel document 8812. Corrected tLOW

typo from 400 ns to 500 ns. Corrected tAA typo from 550 ns to 450 ns. Updated Part Marking Information.

Updated the “Software Reset” section. Added ESD rating. Removed lead finish designation. Updated

trace code format in package markings. Updated section content throughout for clarification. Added a

figure for “System Configuration Using Two-Wire Serial EEPROMs”. Added POR recommendations

section. Updated SOIC, SOIJ and TSSOP package drawings to Microchip format.

Atmel Document 8812 Revision F (January 2015)

Updated the ordering information section, part markings, and the 8X and 8S2 package outline drawings.

Atmel Document 8812 Revision E (March 2013)

Updated document status from preliminary to complete. Correctd WLCSP pinout. Updated footers and

disclaimer page.

Atmel Document 8812 Revision D (January 2013)

Corrected TSSOP pin label 7 to WP.

Atmel Document 8812 Revision C (December 2012)

Added WLCSP package. Updated part markings. Updated pinout diagram. Updated part markings.

Corrected Byte Write figure from second typo error to first word address. Updated Sequential Read figure.

Atmel Document 8812 Revision B (July 2012)

Corrected ordering code: AT24CM01-WWU-11, Die Sale to AT24CM01-WWU11M, Wafer Sale. Updated

Atmel logos and disclaimer page.

Atmel Document 8812 Revision A (May 2012)

Initial release of this document.

AT24CM01

Revision History

The Microchip Web Site

Microchip provides online support via our web site at http://www.microchip.com/. This web site is used as

a means to make files and information easily available to customers. Accessible by using your favorite

Internet browser, the web site contains the following information:

•Product Support – Data sheets and errata, application notes and sample programs, design

resources, user’s guides and hardware support documents, latest software releases and archived

software

•General Technical Support – Frequently Asked Questions (FAQ), technical support requests, online

discussion groups, Microchip consultant program member listing

•Business of Microchip – Product selector and ordering guides, latest Microchip press releases,

listing of seminars and events, listings of Microchip sales offices, distributors and factory

representatives

Customer Change Notification Service

Microchip’s customer notification service helps keep customers current on Microchip products.

Subscribers will receive e-mail notification whenever there are changes, updates, revisions or errata

related to a specified product family or development tool of interest.

To register, access the Microchip web site at http://www.microchip.com/. Under “Support”, click on

“Customer Change Notification” and follow the registration instructions.

Customer Support

Users of Microchip products can receive assistance through several channels:

• Distributor or Representative

• Local Sales Office

• Field Application Engineer (FAE)

• Technical Support

Customers should contact their distributor, representative or Field Application Engineer (FAE) for support.

Local sales offices are also available to help customers. A listing of sales offices and locations is included

in the back of this document.

Technical support is available through the web site at: http://www.microchip.com/support

AT24CM01

Product Identification System

To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office.

Product Family

24C = Standard I

2C-compatible

Serial EEPROM

Device Density

Shipping Carrier Option

Device Grade or

Wafer/Die Thickness

Package Option

B = Bulk (Tubes)

T = Tape and Reel, Standard Quantity Option

E =

Tape and Reel, Extended Quantity Option

Operating Voltage

D = 2.5V to 5.5V

M = 1.7V to 5.5V

H or U = Industrial Temperature Range

(-40°C to +85°C)

11 = 11mil Wafer Thickness

SS = SOIC

S = SOIJ

X = TSSOP

U = WLCSP

A T 24CM 0 1 - SSHD-B

M = Megabit Family

01 = 1 Megabit

Examples

Device Package Package

Drawing

Code

Package

Option

Voltage Shipping

Carrier

Option

Device

Grade

AT24CM01‑SSHD‑B SOIC SN SS 2.5V to

5.5V

Bulk

(Tubes)

Industrial

Temperature

(-40°C to

85°C)

AT24CM01‑SHM‑T SOIJ SM SS 1.7V to

5.5V

Tape and

Reel

AT24CM01‑XHM‑B TSSOP ST X 1.7V to

5.5V

Bulk

(Tubes)

AT24CM01‑UUM‑T WLCSP 8U-6 U 1.7V to

5.5V

Tape and

Reel

Microchip Devices Code Protection Feature

Note the following details of the code protection feature on Microchip devices:

• Microchip products meet the specification contained in their particular Microchip Data Sheet.

• Microchip believes that its family of products is one of the most secure families of its kind on the

market today, when used in the intended manner and under normal conditions.

• There are dishonest and possibly illegal methods used to breach the code protection feature. All of

these methods, to our knowledge, require using the Microchip products in a manner outside the

operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is

engaged in theft of intellectual property.

AT24CM01

• Microchip is willing to work with the customer who is concerned about the integrity of their code.

• Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their

code. Code protection does not mean that we are guaranteeing the product as “unbreakable.”

Code protection is constantly evolving. We at Microchip are committed to continuously improving the

code protection features of our products. Attempts to break Microchip’s code protection feature may be a

violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software

or other copyrighted work, you may have a right to sue for relief under that Act.

Legal Notice

Information contained in this publication regarding device applications and the like is provided only for

your convenience and may be superseded by updates. It is your responsibility to ensure that your

application meets with your specifications. MICROCHIP MAKES NO REPRESENTATIONS OR

WARRANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED, WRITTEN OR ORAL, STATUTORY

OR OTHERWISE, RELATED TO THE INFORMATION, INCLUDING BUT NOT LIMITED TO ITS

CONDITION, QUALITY, PERFORMANCE, MERCHANTABILITY OR FITNESS FOR PURPOSE.

Microchip disclaims all liability arising from this information and its use. Use of Microchip devices in life

support and/or safety applications is entirely at the buyer’s risk, and the buyer agrees to defend,

indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting

from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual

property rights unless otherwise stated.

Trademarks

The Microchip name and logo, the Microchip logo, AnyRate, AVR, AVR logo, AVR Freaks, BitCloud,

chipKIT, chipKIT logo, CryptoMemory, CryptoRF, dsPIC, FlashFlex, flexPWR, Heldo, JukeBlox, KeeLoq,

Kleer, LANCheck, LINK MD, maXStylus, maXTouch, MediaLB, megaAVR, MOST, MOST logo, MPLAB,

OptoLyzer, PIC, picoPower, PICSTART, PIC32 logo, Prochip Designer, QTouch, SAM-BA, SpyNIC, SST,

SST Logo, SuperFlash, tinyAVR, UNI/O, and XMEGA are registered trademarks of Microchip Technology

Incorporated in the U.S.A. and other countries.

ClockWorks, The Embedded Control Solutions Company, EtherSynch, Hyper Speed Control, HyperLight

Load, IntelliMOS, mTouch, Precision Edge, and Quiet-Wire are registered trademarks of Microchip

Technology Incorporated in the U.S.A.

Adjacent Key Suppression, AKS, Analog-for-the-Digital Age, Any Capacitor, AnyIn, AnyOut, BodyCom,

CodeGuard, CryptoAuthentication, CryptoAutomotive, CryptoCompanion, CryptoController, dsPICDEM,

dsPICDEM.net, Dynamic Average Matching, DAM, ECAN, EtherGREEN, In-Circuit Serial Programming,

ICSP, INICnet, Inter-Chip Connectivity, JitterBlocker, KleerNet, KleerNet logo, memBrain, Mindi, MiWi,

motorBench, MPASM, MPF, MPLAB Certified logo, MPLIB, MPLINK, MultiTRAK, NetDetach, Omniscient

Code Generation, PICDEM, PICDEM.net, PICkit, PICtail, PowerSmart, PureSilicon, QMatrix, REAL ICE,

Ripple Blocker, SAM-ICE, Serial Quad I/O, SMART-I.S., SQI, SuperSwitcher, SuperSwitcher II, Total

Endurance, TSHARC, USBCheck, VariSense, ViewSpan, WiperLock, Wireless DNA, and ZENA are

trademarks of Microchip Technology Incorporated in the U.S.A. and other countries.

SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.

Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.

GestIC is a registered trademark of Microchip Technology Germany II GmbH & Co. KG, a subsidiary of

Microchip Technology Inc., in other countries.

AT24CM01

All other trademarks mentioned herein are property of their respective companies.

ISBN: 978-1-5224-4284-4

AMBA, Arm, Arm7, Arm7TDMI, Arm9, Arm11, Artisan, big.LITTLE, Cordio, CoreLink, CoreSight, Cortex,

DesignStart, DynamIQ, Jazelle, Keil, Mali, Mbed, Mbed Enabled, NEON, POP, RealView, SecurCore,

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Quality Management System Certified by DNV

ISO/TS 16949

Microchip received ISO/TS-16949:2009 certification for its worldwide headquarters, design and wafer

fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California

and India. The Company’s quality system processes and procedures are for its PIC® MCUs and dsPIC®

DSCs, KEELOQ® code hopping devices, Serial EEPROMs, microperipherals, nonvolatile memory and

analog products. In addition, Microchip’s quality system for the design and manufacture of development

systems is ISO 9001:2000 certified.

AT24CM01

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