2586QS–AVR–08/2 013
Features
•High Performance, Low Power AVR® 8-Bit Microcontroller
•Advanced RISC Architectur e
– 120 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
•Non-volatile Program and Data Memories
– 2/4/8K Bytes of In-System Programmable Program Memory Flash
• Endurance: 10,000 Write/Erase Cycles
– 128/256/512 Bytes In-System Programmable EEPROM
• Endurance: 100,000 Write/Erase Cycles
– 128/256/512 Bytes Internal SRAM
– Programming Lock for Self-Programming Flash Program and EEPROM Data Security
•Peripheral Features
– 8-bit Timer/Counter with Prescaler and Two PWM Channels
– 8-bit High Speed Timer/Counter with Separate Prescaler
• 2 High Frequency PWM Outputs with Separate Output Compare Registers
• Programmable Dead Time Generator
– USI – Universal Serial Interface with Start Condition Detector
– 10-bit ADC
• 4 Single Ended Channels
• 2 Differential ADC Channel Pairs with Programmable Gain (1x, 20x)
• Temperature Measurement
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
•Special Microcontroller Features
– debugWIRE On-chip Debug System
– In-System Programmable via SPI Port
– External and Internal Interrupt Sources
– Low Power Idle, ADC Noise Reduction, and Power-down Modes
– Enhanced Power-on Reset Circuit
– Programmable Brown-out Detection Circuit
– Internal Calibrated Oscillator
•I/O and Packages
– Six Programmable I/O Lines
– 8-pin PDIP, 8-pin SOIC, 20-pad QFN/MLF, and 8-pin TSSOP (only ATtiny45/V)
•Operating Voltage
– 1.8 - 5.5V for ATtiny25V/45V/85V
– 2.7 - 5.5V for ATtiny25/45/85
•Speed Grade
– ATtiny25V/45V/85V: 0 – 4 MHz @ 1.8 - 5.5V, 0 - 10 MHz @ 2.7 - 5.5V
– ATtiny25/45/85: 0 – 10 MHz @ 2.7 - 5.5V, 0 - 20 MHz @ 4.5 - 5.5V
•Industrial Temperature Range
•Low Power Consumption
– Active Mode:
• 1 MHz, 1.8V: 300 µA
– Power-down Mode:
• 0.1 µA at 1.8V
Atmel 8-bit AVR Microcontroller with 2/4/8K
Bytes In-System Programmable Flash
ATtiny25/V / ATtiny45/V / ATtiny85/V
Summary
Rev. 2586QS–AVR–08/2013
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ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
1. Pin Configurations
Figure 1-1. Pinout ATtiny 25 /45/85
1.1 Pin Descriptions
1.1.1 VCC
Supply voltage.
1.1.2 GND
Ground.
1.1.3 Port B (PB5:PB0)
Port B is a 6-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port B output bu ffers
have symmetrical drive char acteristics with both high sink and source capability. As inputs, Port B pins that are
externally pulled low will source current if the pull-up resistors are ac tivated. The Port B pins are tri-stated when a
reset condition becomes active, even if the clock is not running.
1
2
3
4
8
7
6
5
(PCINT5/RESET/ADC0/dW) PB5
(PCINT3/XTAL1/CLKI/OC1B/ADC3) PB3
(PCINT4/XTAL2/CLKO/OC1B/ADC2) PB4
GND
VCC
PB2 (SCK/USCK/SCL/ADC1/T0/INT0/PCINT2)
PB1 (MISO/DO/AIN1/OC0B/OC1A/PCINT1)
PB0 (MOSI/DI/SDA/AIN0/OC0A/OC1A/AREF/PCINT0)
PDIP/SOIC/TSSOP
1
2
3
4
5
QFN/MLF
15
14
13
12
11
20
19
18
17
16
6
7
8
9
10
DNC
DNC
GND
DNC
DNC
DNC
DNC
DNC
DNC
DNC
NOTE: Bottom pad should be soldered to ground.
DNC: Do Not Connect
NOTE: TSSOP only for ATtiny45/V
(PCINT5/RESET/ADC0/dW) PB5
(PCINT3/XTAL1/CLKI/OC1B/ADC3) PB3
DNC
DNC
(PCINT4/XTAL2/CLKO/OC1B/ADC2) PB4
VCC
PB2 (SCK/USCK/SCL/ADC1/T0/INT0/PCINT2)
DNC
PB1 (MISO/DO/AIN1/OC0B/OC1A/PCINT1)
PB0 (MOSI/DI/SDA/AIN0/OC0A/OC1A/AREF/PCINT0)
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ATtiny25/45/85 [DATASHEET]
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Port B also serves the functions of various special features of the ATtiny25/45/85 as listed in “Alternate Functions
of Port B” on page 60.
On ATtiny25, the programmable I/O ports PB3 and PB4 (pins 2 and 3) are exchanged in ATtiny15 Compatibility
Mode for supporting the backward compatibility with ATtiny15.
1.1.4 RESET
Reset input. A low level on this pin for longer than the minimum pulse length will generate a reset, even if the clock
is not running and provided the reset pin has not been disabled. The minimum pulse length is given in Table 21-4
on page 165. Shorter pulses are not guaranteed to generate a reset.
The reset pi n can also be used as a (weak) I/O pin.
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ATtiny25/45/85 [DATASHEET]
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2. Overview
The ATtiny25/45 /85 is a low-power CM OS 8-bit micro contr oller based on the AVR enhanced RISC architecture. By
executing powerful instructions in a single clock cycle, the ATtiny25/45/85 achieves throughputs approaching 1
MIPS per MHz allowing the system designer to optimize power consumptio n versus processing speed.
2.1 Block Diagram
Figure 2-1. Block Diagram
The AVR core combines a rich instruction set with 32 general purpose working registers. All 32 registers are
directly connected to the Arithmetic Logic Unit (ALU), allowing two independent registers to be accessed in one
single instruction executed in one clock cycle. The resulting architecture is more code efficient while achieving
throughputs up to ten times faster than conventional CISC microcontrollers.
PROGRAM
COUNTER
CALIBRATED
INTERNAL
OSCILLATOR
WATCHDOG
TIMER
STACK
POINTER
PROGRAM
FLASH SRAM
MCU CONTROL
REGISTER
GENERAL
PURPOSE
REGISTERS
INSTRUCTION
REGISTER
TIMER/
COUNTER0
SERIAL
UNIVERSAL
INTERFACE
TIMER/
COUNTER1
INSTRUCTION
DECODER
DATA DIR.
REG.PORT B
DATA REGISTER
PORT B
PROGRAMMING
LOGIC
TIMING AND
CONTROL
MCU STATUS
REGISTER
STATUS
REGISTER
ALU
PORT B DRIVERS
PB[0:5]
VCC
GND
CONTROL
LINES
8-BIT DATABUS
Z
ADC /
ANALOG COMPARATOR
INTERRUPT
UNIT
DATA
EEPROM OSCILLATORS
Y
X
RESET
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ATtiny25/45/85 [DATASHEET]
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The ATtiny 25/45/85 pr ovides th e following fea tures: 2/ 4/8K bytes of In-System Programmable Flash, 128/256/512
bytes EEPROM, 128/256/256 bytes SRAM, 6 general purpose I/O lines, 32 general purpose working registers, one
8-bit Timer/Counter with compare modes, one 8-bit high speed Timer/Counter, Universal Serial Interface, Internal
and External Interrupts, a 4-channel, 10-bit ADC, a programmable Watchdog Timer with internal Oscillator, and
three software selectable power saving modes. Idle mode stops the CPU while allowing the SRAM, Timer/Counter,
ADC, Analog Comparator, and Interrupt system to continue functioning. Power-down mode saves the register con-
tents, disabling all chip functions until the next Interrupt or Hardware Reset. ADC Noise Reduction mode stops the
CPU and all I/O modules except ADC, to minimize switching noise during ADC conversions.
The device is manufactured using Atmel’s high density non-volatile memory technology. The On-chip ISP Flash
allows the Program m emory to be re-programme d In-System through an SPI serial interface, by a conve ntional
non-volatile memory programmer or by an On- chip boot code running on the AVR core.
The ATtiny25/45/85 AVR is supported with a full suite of program and system development tools including: C Com-
pilers, Macro Assemblers, Program Debugger/Simulators and Evaluation kits.
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ATtiny25/45/85 [DATASHEET]
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3. About
3.1 Resources
A comprehensive set of development tools, application notes and datasheets are available for download on
http://www.atmel.com/avr.
3.2 Code Examples
This documentatio n contains simple co de examples that briefly show how to use variou s parts of the de vice. These
code examples assume that the part spe cific header file is included before compilation. Be aware that not all C
compiler vendors include bit definitions in the header files and interrupt handlin g in C is compiler dependent.
Please confirm with the C compiler documentation for more details.
For I/O Registers located in the extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SB I” instru ction s must
be replaced with instructions that allow access to extended I/O. Typically, this means “LDS” and “STS” combined
with “SBRS”, “SBRC”, “SBR”, and “CBR”. Note that not all AVR devices include an extended I/O map.
3.3 Capacitive Touch Sensing
Atmel QTouch Library provides a simple to use solution for touch sensitive interfaces on Atmel AVR microcon-
trollers. The QTouch Library includes support for QTouch® and QMatrix® acquisition methods.
Touch sensing is easily added to any application by linking the QTouch Librar y and using the App lication Pro gram-
ming Interface (API) of the library to define the touch channels and sensors. The application then calls the API to
retrieve channel information and determine the state of the touch sensor.
The QTouch Library is free and can be downloaded from the Atmel website. For more information and details of
implementation, refer to the QTouch Library User Guide – also available from the Atmel website.
3.4 Data Retention
Reliability Qualification results show that the projected data retention failure rate is much less than 1 PPM over 20
years at 85°C or 10 0 ye ar s at 25 ° C.
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ATtiny25/45/85 [DATASHEET]
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4. Register Summary
Note: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
0x3F SREG I T H S V N Z C page 8
0x3E SPH – – – – – – SP9 SP8 page 11
0x3D SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 page 11
0x3C Reserved –
0x3B GIMSK – INT0 PCIE – – – – – page 51
0x3A GIFR – INTF0 PCIF – – – – – page 52
0x39 TIMSK – OCIE1A OCIE1B OCIE0A OCIE0B TOIE1 TOIE0 – pages 81, 102
0x38 TIFR – OCF1A OCF1B OCF0A OCF0B TOV1 TOV0 –page 81
0x37 SPMCSR –– RSIG CTPB RFLB PGWRT PGERS SPMEN page 145
0x36 Reserved –
0x35 MCUCR BODS PUD SE SM1 SM0 BODSE ISC01 ISC00 pages 37, 51, 64
0x34 MCUSR – – – – WDRF BORF EXTRF PORF page 44,
0x33 TCCR0B FOC0A FOC0B –– WGM02 CS02 CS01 CS00 page 79
0x32 TCNT0 Timer/Counter0 page 80
0x31 OSCCAL Oscillator Calibration Register page 31
0x30 TCCR1 CTC1 PWM1A COM1A1 COM1A0 CS13 CS12 CS11 CS10 pages 89, 100
0x2F TCNT1 Timer/Counter1 pages 91, 102
0x2E OCR1A Timer/Counter1 Output Compare Register A pages 91, 102
0x2D OCR1C Timer/Counter1 Output Compare Register C pages 91, 102
0x2C GTCCR TSM PWM1B COM1B1 COM1B0 FOC1B FOC1A PSR1 PSR0 pages 77, 90, 101
0x2B OCR1B Timer/Counter1 Output Compare Register B page 92
0x2A TCCR0A COM0A1 COM0A0 COM0B1 COM0B0 –WGM01 WGM00 page 77
0x29 OCR0A Timer/Counter0 – Output Compare Register A page 80
0x28 OCR0B Timer/Counter0 – Output Compare Register B page 81
0x27 PLLCSR LSM –––– PCKE PLLE PLOCK pages 94, 103
0x26 CLKPR CLKPCE – – – CLKPS3 CLKPS2 CLKPS1 CLKPS0 page 32
0x25 DT1A DT1AH3 DT1AH2 DT1AH1 DT1AH0 DT1AL3 DT1AL2 DT1AL1 DT1AL0 page 107
0x24 DT1B DT1BH3 DT1BH2 DT1BH1 DT1BH0 DT1BL3 DT1BL2 DT1BL1 DT1BL0 page 107
0x23 DTPS1 - - - - - - DTPS11 DTPS10 page 106
0x22 DWDR DWDR[7:0] page 140
0x21 WDTCR WDIF WDIE WDP3 WDCE WDE WDP2 WDP1 WDP0 page 45
0x20 PRR –PRTIM1 PRTIM0 PRUSI PRADC page 36
0x1F EEARH EEAR8 page 20
0x1E EEARL EEAR7 EEAR6 EEAR5 EEAR4 EEAR3 EEAR2 EEAR1 EEAR0 page 21
0x1D EEDR EEPROM Data Register page 21
0x1C EECR –– EEPM1 EEPM0 EERIE EEMPE EEPE EERE page 21
0x1B Reserved –
0x1A Reserved –
0x19 Reserved –
0x18 PORTB –– PORTB5 PORTB4 PORTB3 PORTB2 PORTB1 PORTB0 page 64
0x17 DDRB –– DDB5 DDB4 DDB3 DDB2 DDB1 DDB0 page 64
0x16 PINB –– PINB5 PINB4 PINB3 PINB2 PINB1 PINB0 page 64
0x15 PCMSK –– PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 page 52
0x14 DIDR0 –– ADC0D ADC2D ADC3D ADC1D AIN1D AIN0D pages 121, 138
0x13 GPIOR2 General Purpose I/O Register 2 page 10
0x12 GPIOR1 General Purpose I/O Register 1 page 10
0x11 GPIOR0 General Purpose I/O Register 0 page 10
0x10 USIBR USI Buffer Register page 115
0x0F USIDR USI Data Register page 115
0x0E USISR USISIF USIOIF USIPF USIDC USICNT3 USICNT2 USICNT1 USICNT0 page 115
0x0D USICR USISIE USIOIE USIWM1 USIWM0 USICS1 USICS0 USICLK USITC page 116
0x0C Reserved –
0x0B Reserved –
0x0A Reserved –
0x09 Reserved –
0x08 ACSR ACD ACBG ACO ACI ACIE –ACIS1 ACIS0 page 120
0x07 ADMUX REFS1 REFS0 ADLAR REFS2 MUX3 MUX2 MUX1 MUX0 page 134
0x06 ADCSRA ADEN ADSC ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 page 136
0x05 ADCH ADC Data Register High Byte page 137
0x04 ADCL ADC Data Register Low Byte page 137
0x03 ADCSRB BIN ACME IPR –– ADTS2 ADTS1 ADTS0 pages 120, 137
0x02 Reserved –
0x01 Reserved –
0x00 Reserved –
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ATtiny25/45/85 [DATASHEET]
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should never be written.
2. I/O Registers within the address range 0x00 - 0x1F are directly bit-accessible using the SBI and CBI instructions. In these
registers, the value of single bits can be checked by using the SBIS and SBIC instructions.
3. Some of the Status Flags are cleared by writing a logical one to them. Note that, unlike most other AVRs, the CBI and SBI
instructions will only operation the specified bit, and can therefore be used on registers containing such Status Flags. The
CBI and SBI instructions work with registers 0x00 to 0x1F only.
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ATtiny25/45/85 [DATASHEET]
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5. Instruction Set Summary
Mnemonics Operands Description Operation Flags #Clocks
ARITHMETIC AND LOGIC INSTRUCTIONS
ADD Rd, Rr Add two Registers Rd Rd + Rr Z,C,N,V,H 1
ADC Rd, Rr Add with Carry two Registers Rd Rd + Rr + C Z,C,N,V,H 1
ADIW Rdl,K Add Immediate to Word Rdh:Rdl Rdh:Rdl + K Z,C,N,V,S 2
SUB Rd, Rr Subtract two Registers Rd Rd - Rr Z,C,N,V,H 1
SUBI Rd, K Subtract Constant from Register Rd Rd - K Z,C,N,V,H 1
SBC Rd, Rr Subtract with Carry two Registers Rd Rd - Rr - C Z,C,N,V,H 1
SBCI Rd, K Subtract with Carry Constant from Reg. Rd Rd - K - C Z,C,N,V,H 1
SBIW Rdl,K Subtract Immediate from Word Rdh:Rdl Rdh:Rdl - K Z,C,N,V,S 2
AND Rd, Rr Logical AND Registers Rd Rd Rr Z,N,V 1
ANDI Rd, K Logical AND Register an d Constant Rd Rd K Z,N,V 1
OR Rd, Rr Logical OR Registers Rd Rd v Rr Z,N,V 1
ORI Rd, K Logical OR Register and Constant Rd Rd v K Z,N,V 1
EOR Rd, Rr Exclusive OR Registers Rd Rd Rr Z,N,V 1
COM Rd One’s Complement Rd 0xFF Rd Z,C,N,V 1
NEG Rd Two’s Complement Rd 0x00 Rd Z,C,N,V,H 1
SBR Rd,K Set Bit(s) in Register Rd Rd v K Z,N,V 1
CBR Rd,K Clear Bit(s) in Register Rd Rd (0xFF - K) Z,N,V 1
INC Rd Increment Rd Rd + 1 Z,N,V 1
DEC Rd Decrement Rd Rd 1 Z,N,V 1
TST Rd Test for Zero or Minus Rd Rd Rd Z,N,V 1
CLR Rd Clear Register Rd Rd Rd Z,N,V 1
SER Rd Set Register Rd 0xFF None 1
BRANCH INSTRUCTIONS
RJMP k Relative Jump PC PC + k + 1 None 2
IJMP Indirect Jump to (Z) PC Z None 2
RCALL k Re l ative Subrou tine Call PC PC + k + 1 None 3
ICALL Indirect Call to (Z) PC ZNone3
RET Subroutine Return PC STACK None 4
RETI Interrupt Return PC STACK I 4
CPSE Rd,Rr Compare, Skip if Equal if (Rd = Rr) PC PC + 2 or 3 None 1/2/3
CP Rd,Rr Compare Rd Rr Z, N,V,C,H 1
CPC Rd,Rr Compare with Carry Rd Rr C Z, N,V,C,H 1
CPI Rd,K Compare Register with Immediate Rd K Z, N,V,C,H 1
SBRC Rr, b Skip if Bit in Register Cleared if (Rr(b)=0) PC PC + 2 or 3 None 1/2/3
SBRS Rr, b Ski p if Bit in Register is Set if (Rr(b)=1) PC PC + 2 or 3 None 1/2/3
SBIC P, b Skip if Bit in I/O Register Cleared if (P(b)=0) PC PC + 2 or 3 None 1/2/3
SBIS P, b Skip if Bit in I/O Register is Set if (P(b)=1) PC PC + 2 or 3 None 1/2/3
BRBS s, k Branch if Status Flag Set if (SREG(s) = 1) then PCPC+k + 1 None 1/2
BRBC s, k Branch if Status Flag Cleared if (SREG(s) = 0) then PCPC+k + 1 None 1/2
BREQ k Branch if Equal if (Z = 1) then PC PC + k + 1 None 1/2
BRNE k Branch if Not Equal if (Z = 0) then PC PC + k + 1 None 1/2
BRCS k Branch if Carry Set if (C = 1) then PC PC + k + 1 None 1/2
BRCC k Branch if Carry Cleared if (C = 0) then PC PC + k + 1 None 1/2
BRSH k Branch if Same or Higher if (C = 0) then PC PC + k + 1 None 1/2
BRLO k Branch if Lower if (C = 1) then PC PC + k + 1 None 1/2
BRMI k Branch if Minus if (N = 1) then PC PC + k + 1 None 1/2
BRPL k Branch if Plus if (N = 0) then PC PC + k + 1 None 1/2
BRGE k Branch if Greater or Equal, Signed if (N V= 0) then PC PC + k + 1 None 1/2
BRLT k Branch if Less Than Zero, Signed if (N V= 1) then PC PC + k + 1 None 1/2
BRHS k Branch if Half Carry Flag Set if (H = 1) then PC PC + k + 1 None 1/2
BRHC k Branch if Half Carry Flag Clear ed if (H = 0) then PC PC + k + 1 None 1/2
BRTS k Branch if T Flag Set if (T = 1) then PC PC + k + 1 None 1/2
BRTC k Branch if T Flag Cleared if (T = 0) then PC PC + k + 1 None 1/2
BRVS k Branch if Overflow Flag is Set if (V = 1) then PC PC + k + 1 None 1/2
BRVC k Branch if Overflow Flag is Cleared if (V = 0) then PC PC + k + 1 None 1/2
BRIE k Branch if Interrupt Enabled if ( I = 1) then PC PC + k + 1 None 1/2
BRID k Branch if Interrupt Disabled if ( I = 0) then PC PC + k + 1 None 1/2
BIT AND BIT-TEST INSTRUCTIONS
SBI P,b Set Bit in I/O Register I/O(P,b) 1None2
CBI P,b Clear Bit in I/O Register I/O(P,b) 0None2
LSL Rd Logical Shift Left Rd(n+1) Rd(n), Rd(0) 0 Z,C,N,V 1
LSR Rd Logical Shift Right Rd(n) Rd(n+1), R d(7) 0 Z,C,N,V 1
ROL Rd Rotate Left Through Carry Rd(0)C,Rd(n+1) Rd(n),CRd(7) Z,C,N,V 1
ROR Rd Rotate Right Through Ca rry Rd(7)C,Rd(n) Rd(n+1),CRd(0) Z,C,N,V 1
ASR Rd Arithmetic Shift Right Rd(n) Rd(n+1), n=0..6 Z,C,N,V 1
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ATtiny25/45/85 [DATASHEET]
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SWAP Rd Swap Nibble s Rd(3..0)Rd(7..4),Rd(7..4)Rd(3..0) None 1
BSET s Flag Set SREG(s) 1 SREG(s) 1
BCLR s Flag Clear SREG(s) 0 SREG(s) 1
BST Rr, b Bit Store from Register to T T Rr(b) T 1
BLD Rd, b Bit load from T to Register Rd(b) TNone1
SEC Set Carry C 1C1
CLC Clear Carry C 0 C 1
SEN Set Negative Flag N 1N1
CLN Clear Negative Flag N 0 N 1
SEZ Set Zero Flag Z 1Z1
CLZ Clear Zero Flag Z 0 Z 1
SEI Global Interrupt Enable I 1I1
CLI Global Interrupt Disable I 0 I 1
SES Set Signed Test Flag S 1S1
CLS Clear Signed Test Flag S 0 S 1
SEV Set Twos Complement Overflow. V 1V1
CLV Clear Twos Compl ement Overflow V 0 V 1
SET Set T in SREG T 1T1
CLT Clear T in SREG T 0 T 1
SEH Set Half Carry Flag in SREG H 1H1
CLH Clear Half Carry Flag in SRE G H 0 H 1
DATA TRANSFER INSTRUCTIONS
MOV Rd, Rr Move Between Registers Rd Rr None 1
MOVW Rd, Rr Copy Register Word Rd+1:Rd Rr+1:Rr None 1
LDI Rd, K Load Immediate Rd KNone1
LD Rd, X Lo ad Indirect Rd (X) None 2
LD Rd, X+ Load Indirect and Post-Inc. Rd (X), X X + 1 None 2
LD Rd, - X Load Indirect and Pre-Dec. X X - 1, Rd (X) None 2
LD Rd, Y Lo ad Indirect Rd (Y) None 2
LD Rd, Y+ Load Indirect and Post-Inc. Rd (Y), Y Y + 1 None 2
LD Rd, - Y Load Indirect and Pre-Dec. Y Y - 1, Rd (Y) None 2
LDD Rd,Y+q Load Indirect with Displacement Rd (Y + q) None 2
LD Rd, Z Load Indirect Rd (Z) None 2
LD Rd, Z+ Load Indirect and Post-Inc. Rd (Z), Z Z+1 None 2
LD Rd, -Z Load Indirect and Pre-Dec. Z Z - 1, Rd (Z) None 2
LDD Rd, Z+q Load Indirect with Displacement Rd (Z + q) None 2
LDS Rd, k Load Direct from SRAM Rd (k) None 2
ST X, Rr Store Indirect (X) Rr None 2
ST X+, Rr Store Indirect and Post-Inc. (X) Rr, X X + 1 None 2
ST - X, Rr Store Indirect and Pre-Dec. X X - 1, (X) Rr None 2
ST Y, Rr Store Indirect (Y) Rr None 2
ST Y+, Rr Store Indirect and Post-Inc. (Y) Rr, Y Y + 1 None 2
ST - Y, Rr Store Indirect and Pre-Dec. Y Y - 1, (Y) Rr None 2
STD Y+q,Rr Store Indirect with Displacement (Y + q) Rr None 2
ST Z, Rr Store Indirect (Z) Rr None 2
ST Z+, Rr Store Indirect and Post-Inc. (Z) Rr, Z Z + 1 None 2
ST -Z, Rr Store Indirect and Pre-Dec. Z Z - 1, (Z) Rr None 2
STD Z+q,Rr Store Indirect with Displacement (Z + q) Rr None 2
STS k, Rr Store Direct to SRAM (k) Rr None 2
LPM Load Pr ogram Memory R0 (Z) None 3
LPM Rd, Z Load Program Memory Rd (Z) None 3
LPM Rd, Z+ Loa d Program Memory and Post -Inc Rd (Z), Z Z+1 None 3
SPM Store Program Memory (z) R1:R0 None
IN Rd, P In Port Rd PNone1
OUT P, Rr Out Port P Rr None 1
PUSH Rr Push Register on Stack STACK Rr None 2
POP Rd Pop Registe r fr om Stack Rd STACK None 2
MCU CONTROL INSTRUCTIONS
NOP No Operation None 1
SLEEP Sleep (see specific descr. for Sleep function) None 1
WDR Watchdog Reset (see specific descr. for WDR/Timer) None 1
BREAK Break For On-chip Debug Only None N/A
Mnemonics Operands Description Operation Flags #Clocks
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6. Ordering Information
Notes: 1. For speed vs. supply voltage, see section 21.3 “Speed” on page 163.
2. All Pb-free, halide-free, fully green, and comply with European directive for Restriction of Hazardous Substances (RoHS).
3. Code indicators: H = NiPdAu lead finish, U/N = matte tin, R = tape & reel.
4. Can also be supplied in wafer form. Contact your local Atmel sales office for ordering information and minimum quantities.
5. For characteristics, see “Appendix A – Specification at 105C”.
6. For characteristics, see “Appendix B – Specification at 125C”.
6.1 ATtiny25
Speed (MHz) (1) Supply Voltage (V) Temperature Range Package (2) Ordering Code (3)
10 1.8 – 5.5
Industrial
(-40C to +85C) (4)
8P3 ATtiny25V-10PU
8S2
ATtiny25V-10SU
ATtiny25V-10SUR
ATtiny25V-10SH
ATtiny25V-10SHR
S8S1
ATtiny25V-10SSU
ATtiny25V-10SSUR
ATtiny25V-10SSH
ATtiny25V-10SSHR
20M1 ATtiny25V-10MU
ATtiny25V-10MUR
Industrial
(-40C to +105C) (5)
8S2 ATtiny25V-10SN
ATtiny25V-10SNR
S8S1 ATtiny25V-10SSN
ATtiny25V-10SSNR
Industrial (-40C to +125C) (6) 20M1 ATtiny25V-10MF
ATtiny25V-10MFR
20 2.7 – 5.5
Industrial
(-40C to +85C) (4)
8P3 ATtiny25-20PU
8S2
ATtiny25-20SU
ATtiny25-20SUR
ATtiny25-20SH
ATtiny25-20SHR
S8S1
ATtiny25-20SSU
ATtiny25-20SSUR
ATtiny25-20SSH
ATtiny25-20SSHR
20M1 ATtiny25-20MU
ATtiny25-20MUR
Industrial
(-40C to +105C) (5)
8S2 ATtiny25-20SN
ATtiny25-20SNR
S8S1 ATtiny25-20SSN
ATtiny25-20SSNR
Industrial (-40C to +125C) (6) 20M1 ATtiny25-20MF
ATtiny25-20MFR
Package Types
8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S2 8-lead, 0.208" Wide, Plastic Gull-Wing Small Outline (EIAJ SOIC)
S8S1 8-lead, 0.150" Wide, Plastic Gull-Wing Small Outline (JEDEC SOIC)
20M1 20-pad, 4 x 4 x 0.8 mm Body, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)
12
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
Notes: 1. For speed vs. supply voltage, see section 21.3 “Speed” on page 163.
2. All packages are Pb-free, halide-free and fully green and they comply with the European directive for Restriction of Hazard-
ous Substances (RoHS).
3. Code indicators:
– H: NiPdAu lead finish
– U: matte tin
– R: tape & reel
4. These devices can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering informa-
tion and minimum quantities.
6.2 ATtiny45
Speed (MHz) (1) Supply Voltage (V) Temperature Range Package (2) Ordering Code (3)
10 1.8 – 5.5 Industrial
(-40C to +85C) (4)
8P3 ATtiny45V-10PU
8S2
ATtiny45V-10SU
ATtiny45V-10SUR
ATtiny45V-10SH
ATtiny45V-10SHR
8X ATtiny45V-10XU
ATtiny45V-10XUR
20M1 ATtiny45V-10MU
ATtiny45V-10MUR
20 2.7 – 5.5 Industrial
(-40C to +85C) (4)
8P3 ATtiny45-20PU
8S2
ATtiny45-20SU
ATtiny45-20SUR
ATtiny45-20SH
ATtiny45-20SHR
8X ATtiny45-20XU
ATtiny45-20XUR
20M1 ATtiny45-20MU
ATtiny45-20MUR
Package Types
8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S2 8-lead, 0.208" Wide, Plastic Gull-Wing Small Outline (EIAJ SOIC)
8X 8-lead, 4.4 mm Wide, Plastic Thin Shrink Small Outline Package (TSSOP)
20M1 20-pad, 4 x 4 x 0.8 mm Body, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)
13
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
Notes: 1. For speed vs. supply voltage, see section 21.3 “Speed” on page 163.
2. All packages are Pb-free, halide-free and fully green and they comply with the European directive for Restriction of Hazard-
ous Substances (RoHS).
3. Code indicators:
– H: NiPdAu lead finish
– U: matte tin
– R: tape & reel
4. These devices can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering informa-
tion and minimum quantities.
6.3 ATtiny85
Speed (MHz) (1) Supply Voltage (V) Temperature Range Package (2) Ordering Code (3)
10 1.8 – 5.5 Industrial
(-40C to +85C) (4)
8P3 ATtiny85V-10PU
8S2
ATtiny85V-10SU
ATtiny85V-10SUR
ATtiny85V-10SH
ATtiny85V-10SHR
20M1 ATtiny85V-10MU
ATtiny85V-10MUR
20 2.7 – 5.5 Industrial
(-40C to +85C) (4)
8P3 ATtiny85-20PU
8S2
ATtiny85-20SU
ATtiny85-20SUR
ATtiny85-20SH
ATtiny85-20SHR
20M1 ATtiny85-20MU
ATtiny85-20MUR
Package Types
8P3 8-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
8S2 8-lead, 0.208" Wide, Plastic Gull-Wing Small Outline (EIAJ SOIC)
20M1 20-pad, 4 x 4 x 0.8 mm Body, Quad Flat No-Lead/Micro Lead Frame Package (QFN/MLF)
14
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
7. Packaging Information
7.1 8P3
2325 Orchard Parkway
San Jose, CA 95131
TITLE DRAWING NO.
R
REV.
8P3, 8-lead, 0.300" Wide Body, Plastic Dual
In-line Package (PDIP)
01/09/02
8P3 B
D
D1
E
E1
e
L
b2
b
A2 A
1
N
eA
c
b3
4 PLCS
Top View
Side View
End View
COMMON DIMENSIONS
(Unit of Measure = inches)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This drawing is for general information only; refer to JEDEC Drawing MS-001, Variation BA for additional information.
2. Dimensions A and L are measured with the package seated in JEDEC seating plane Gauge GS-3.
3. D, D1 and E1 dimensions do not include mold Flash or protrusions. Mold Flash or protrusions shall not exceed 0.010 inch.
4. E and eA measured with the leads constrained to be perpendicular to datum.
5. Pointed or rounded lead tips are preferred to ease insertion.
6. b2 and b3 maximum dimensions do not include Dambar protrusions. Dambar protrusions shall not exceed 0.010 (0.25 mm).
A 0.210 2
A2 0.115 0.130 0.195
b 0.014 0.018 0.022 5
b2 0.045 0.060 0.070 6
b3 0.030 0.039 0.045 6
c 0.008 0.010 0.014
D 0.355 0.365 0.400 3
D1 0.005 3
E 0.300 0.310 0.325 4
E1 0.240 0.250 0.280 3
e 0.100 BSC
eA 0.300 BSC 4
L 0.115 0.130 0.150 2
15
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
7.2 8S2
TITLE DRAWING NO. GPC REV.
Package Drawing Contact:
packagedrawings@atmel.com 8S2STN F
8S2, 8-lead, 0.208” Body, Plastic Small
Outline Package (EIAJ)
4/15/08
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This drawing is for general information only; refer to EIAJ Drawing EDR-7320 for additional information.
2. Mismatch of the upper and lower dies and resin burrs aren't included.
3. Determines the true geometric position.
4. Values b,C apply to plated terminal. The standard thickness of the plating layer shall measure between 0.007 to .021 mm.
A 1.70 2.16
A1 0.05 0.25
b 0.35 0.48 4
C 0.15 0.35 4
D 5.13 5.35
E1 5.18 5.40 2
E 7.70 8.26
L 0.51 0.85
θ 0° 8°
e 1.27 BSC 3
θθ
11
NN
EE
TOP VIEWTOP VIEW
CC
E1E1
END VIEWEND VIEW
AA
bb
LL
A1A1
ee
DD
SIDE VIEWSIDE VIEW
16
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
7.3 S8S1
2325 Orchard Parkway
San Jose, CA 95131
TITLE DRAWING NO.
R
REV.
S8S1, 8-lead, 0.150" Wide Body, Plastic Gull Wing Small
Outline (JEDEC SOIC)
7/28/03
S8S1 A
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
Notes: 1. This drawing is for general information only; refer to JEDEC Drawing MS-012 for proper dimensions, tolerances, datums,etc.
E 5.79 6.20
E1 3.81 3.99
A 1.35 1.75
A1 0.1 0.25
D 4.80 4.98
C 0.17 0.25
b 0.31 0.51
L 0.4 1.27
e 1.27 BSC
0o 8o
Top View
Side View
End View
1
N
C
A
A1
b
L
e
D
E1 E
17
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
7.4 8X
TITLE DRAWING NO.
R
REV.
Note: These drawings are for general information only. Refer to JEDEC Drawing MO-153AC.
2325 Orchard Parkway
San Jose, CA 95131
4/14/05
8X, 8-lead, 4.4 mm Body Width, Plastic Thin Shrink
Small Outline Package (TSSOP) 8X A
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
A 1.05 1.10 1.20
A1 0.05 0.10 0.15
b 0.25 – 0.30
C – 0.127 –
D 2.90 3.05 3.10
E1 4.30 4.40 4.50
E 6.20 6.40 6.60
e 0.65 TYP
L 0.50 0.60 0.70
Ø
0
o – 8
o
CC
AA
bb
LL
A1A1
D
Side View
Top View
End View
EE
11
E1E1
e
ØØ
18
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
7.5 20M1
2325 Orchard Parkway
San Jose, CA 95131
TITLE DRAWING NO.
R
REV.
20M1, 20-pad, 4 x 4 x 0.8 mm Body, Lead Pitch 0.50 mm, B
20M1
10/27/04
2.6 mm Exposed Pad, Micro Lead Frame Package (MLF)
A 0.70 0.75 0.80
A1 – 0.01 0.05
A2 0.20 REF
b 0.18 0.23 0.30
D 4.00 BSC
D2 2.45 2.60 2.75
E 4.00 BSC
E2 2.45 2.60 2.75
e 0.50 BSC
L 0.35 0.40 0.55
SIDE VIEW
Pin 1 ID
Pin #1
Notch
(0.20 R)
BOTTOM VIEW
TOP VIEW
Note: Reference JEDEC Standard MO-220, Fig. 1 (SAW Singulation) WGGD-5.
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL MIN NOM MAX NOTE
D
E
e
A2
A1
A
D2
E2
0.08 C
L
1
2
3
b
1
2
3
19
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
8. Errata
8.1 Errata ATtiny25
The revision letter in this section refers to the revision of the ATtiny25 device.
8.1.1 Rev D – F
No known errata.
8.1.2 Rev B – C
•EEPROM read may fail at low supply voltage / low clock frequency
1. EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1MHz and supply voltage is below 2V. If operating fre-
quency can not be r aised abo ve 1MHz th en supp ly voltage should be more th an 2V. Similarly, if supply voltage
can not be raised above 2V then operating frequency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised. Guidelines are given for
room temperature, only.
8.1.3 Rev A
Not sampled.
8.2 Errata ATtiny45
The revision letter in this section refers to the revision of the ATtiny45 device.
8.2.1 Rev F – G
No known errata
8.2.2 Rev D – E
•EEPROM read may fail at low supply voltage / low clock frequency
1. EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1MHz and supply voltage is below 2V. If operating fre-
quency can not be r aised abo ve 1MHz th en supp ly voltage should be more th an 2V. Similarly, if supply voltage
can not be raised above 2V then operating frequency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised. Guidelines are given for
room temperature, only.
20
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
8.2.3 Rev B – C
•PLL not locking
•EEPROM read from application code does not work in Lock Bit Mode 3
•EEPROM read may fail at low supply voltage / low clock frequency
•Timer Counter 1 PWM output generation on OC1B- XOC1B does not work correctly
1. PLL not locking
When at frequencies below 6.0 MHz, the PLL will not lock
Problem fix / Workaround
When using the PLL, ru n at 6.0 MHz or higher.
2. EEPROM read from application code does not work in Lock Bit Mode 3
When the Memory Lock Bits LB2 and LB1 are programmed to mode 3, EEPROM read does not work from the
application code.
Problem Fix/Work around
Do not set Lock Bit Protection Mode 3 when the application code needs to read from EEPROM.
3. EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1MHz and supply voltage is below 2V. If operating fre-
quency can not be r aised abo ve 1MHz th en supp ly voltage should be more th an 2V. Similarly, if supply voltage
can not be raised above 2V then operating frequency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised. Guidelines are given for
room temperature, only.
4. Timer Counter 1 PWM output generation on OC1B – XOC1B does not work correctly
Timer Counter1 PWM output OC1B-XOC1B does not work correctly. Only in the case when the control bits,
COM1B1 and COM1B0 are in the same mode as COM1A1 and COM1A0, respectively, the OC1B-XOC1B ou t-
put works correctly.
Problem Fix/Work around
The only workaround is to use same control setting on COM1A[1: 0] and COM1B[1:0] control bits, see table 14-
4 in the data sheet. The problem has been fixed for Tiny45 rev D.
8.2.4 Rev A
•Too high power down power consumption
•DebugWIRE looses communication when single stepping into interrupts
•PLL not locking
•EEPROM read from application code does not work in Lock Bit Mode 3
•EEPROM read may fail at low supply voltage / low clock frequency
1. Too high power down power consumption
Three situations will lead to a too high power down power consumption. These are:
– An external clock is selected by fuses, but the I/O PORT is still enabled as an output.
– The EEPROM is read before entering power down.
– VCC is 4.5 volts or higher.
Problem fix / Workaround
21
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
– When using external clock, avoid setting the clock pin as Output.
– Do not read the EEPROM if power down power consumption is important.
– Use VCC lower than 4.5 Volts.
2. DebugWIRE looses communication when single stepping into interrupts
When receiving an interrupt during single stepping, debugwire will loose
communication.
Problem fix / Workaround
– When singlestepping, disable interrupts.
– When debugging interrupts, use breakpoints within the interrupt routine, and run into the interrupt.
3. PLL not locking
When at frequencies below 6.0 MHz, the PLL will not lock
Problem fix / Workaround
When using the PLL, ru n at 6.0 MHz or higher.
4. EEPROM read from application code does not work in Lock Bit Mode 3
When the Memory Lock Bits LB2 and LB1 are programmed to mode 3, EEPROM read does not work from the
application code.
Problem Fix/Work around
Do not set Lock Bit Protection Mode 3 when the application code needs to read from EEPROM.
5. EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1MHz and supply voltage is below 2V. If operating fre-
quency can not be r aised abo ve 1MHz th en supp ly voltage should be more th an 2V. Similarly, if supply voltage
can not be raised above 2V then operating frequency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterized. Guidelines are given for
room temperature, only.
22
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
8.3 Errata ATtiny85
The revision letter in this section refers to the revision of the ATtiny85 device.
8.3.1 Rev B – C
No known errata.
8.3.2 Rev A
•EEPROM read may fail at low supply voltage / low clock frequency
1. EEPROM read may fail at low supply voltage / low clock frequency
Trying to read EEPROM at low clock frequencies and/or low supply voltage may result in invalid data.
Problem Fix/Workaround
Do not use the EEPROM when clock frequency is below 1MHz and supply voltage is below 2V. If operating fre-
quency can not be r aised abo ve 1MHz th en supp ly voltage should be more th an 2V. Similarly, if supply voltage
can not be raised above 2V then operating frequency should be more than 1MHz.
This feature is known to be temperature dependent but it has not been characterised. Guidelines are given for
room temperature, only.
23
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
9. Datasheet Revision History
9.1 Rev. 2586Q-08/13
9.2 Rev. 2586P-06/13
9.3 Rev. 2586O-02/13
Updated ordering codes on page 11, page 12, and page 13.
9.4 Rev. 2586N-04/11
1. Added:
– Section “Capacitive Touch Sensing” on page 6.
2. Updated:
– Document template.
– Removed “Preliminary” on front page. All devices now final and in production.
– Section “Limitations” on page 36.
– Program example on page 49.
– Section “Overview” on page 122.
–Table 17-4 on page 135.
– Section “Limitations of debugWIRE” on page 140.
– Section “Serial Programming Algorithm” on page 151.
–Table 21-7 on page 166.
– EEPROM errat a on pages 19, 19, 20, 21, and 22
– Ordering information on pages 11, 12, and 13.
9.5 Rev. 2586M-07/10
1. Clarified Section 6.4 “Clock Output Buffer” on page 31.
2. Added Ordering Codes -SN and -SNR for ATtiny25 extended temperature.
9.6 Rev. 2586L-06/10
1. Added:
– TSSOP for ATtiny45 in “Features” on page 1, Pinout Figure 1-1 on page 2, Ordering Information in
Section 6.2 “ATtiny45” on page 12, and Packaging Information in Section 7.4 “8X” o n page 17
–Table 6-11, “Capacitance of Low-Frequency Crystal Oscillator,” on page 29
–Figure 22-36 on page 191 and Figure 22-37 on page 191, Typical Characteristics plots for Bandgap
Voltage vs. VCC and Temperature
– Extended temperature in Section 6.1 “ATtiny25” on page 11, Ordering Information
1. “Bit 3 – FOC1B: Force Output Compare Match 1B” description in “GTCCR – General Timer/Counter1 Control
Register” on page 90 updated: PB3 in “compare match output pin PB3 (OC1B)” corrected to PB4.
1. Updated de scri ption of “EEARH – EEPROM Address Register” and “EEARL – EEPROM Address Register” on page
20.
24
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
– Tape & reel part numbers in Ordering Information, in Section 6.1 “ATtiny25” on page 11 and Section
6.2 “ATtiny45” on page 12
2. Updated:
–“Feature s” on page 1, removed Preliminary from ATtiny25
–Section 8.4.2 “Code Example” on p age 44
–“PCMSK – Pin Change Mask Register” on page 52, Bit Descriptions
–“TCCR1 – Timer/Counter1 Control Register” on page 89 and “GTCCR – General Timer/Counter1
Control Register” on page 90, COM bit descriptions clarified
–Section 20.3.2 “Calibration Bytes” on page 150, frequencies (8 MHz, 6.4 MHz)
–Table 20-11, “Minimum Wait Delay Before Writing the Next Flash or EEPROM Location,” on page 153,
value for tWD_ERASE
–Table 20-16, “High-voltage Serial Programming Instruction Set fo r ATtiny25/45/85,” on page 158
–Table 21-1, “DC Characteristics. TA = -40C to +85C,” on page 161, notes adjusted
–Table 21-11, “Serial Programming Characteristics, TA = -40C to +85C, VCC = 1.8 - 5.5V (Unless
Otherwise Noted),” on page 170, added tSLIV
– Bit syntax throughout the datasheet, e.g. from CS02:0 to CS0[2:0].
9.7 Rev. 2586K-01/08
1. Updated Document Template.
2. Added Sections:
–“Data Retention” on page 6
–“Low Level Interrupt” on page 49
–“Device Signature Imprint Table” on page 149
3. Updated Sections:
–“Internal PLL for Fast Peripheral Clock Generation - clkPCK” on page 24
–“System Clock and Clock Options” on page 23
–“Internal PLL in ATtiny15 Compatibility Mode” on page 24
–“Sleep Modes” on page 34
–“Software BOD Disable” on page 35
–“External Interrupts” on page 49
–“Timer/Counter1 in PWM Mode” on page 97
–“USI – Universal Serial Interface” on page 108
–“Temperature Mea surement” on page 133
–“Reading Lock, Fuse and Signature Data from Software” on page 143
–“Program And Data Memory Lock Bits” on page 147
–“Fuse Bytes” on page 148
–“Signature Bytes” on page 150
–“Calibration Bytes” on page 150
–“System and Reset Characteristics” on page 165
4. Added Figures:
–“Reset Pin Output Voltage vs. Sink Current (VCC = 3V)” on page 184
–“Reset Pin Output Voltage vs. Sink Current (VCC = 5V)” on page 185
–“Reset Pin Output Voltage vs. Source Current (VCC = 3V)” on page 185
25
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
–“Reset Pin Output Voltage vs. Source Current (VCC = 5V)” on page 186
5. Updated Figure:
–“Reset Logic” on page 39
6. Updated Tables:
–“Start-up Times for Internal Calibrated RC Oscillator Clock” on page 28
–“Start-up Times for Internal Calibrated RC Oscillator Clock (in ATtiny15 Mode)” on page 28
–“Start-up Times for the 128 kHz Internal Oscillator” on page 28
–“Compare Mode Select in PWM Mode” on page 86
–“Compare Mode Select in PWM Mode” on page 98
–“DC Characteristics. TA = -40C to +85C” on page 161
–“Calibration Accuracy of Internal RC Oscillator” on page 164
–“ADC Characteristics” on page 167
7. Updated Code Example in Section:
–“Write” on page 17
8. Updated Bit Descriptions in:
–“MCUCR – MCU Control Register” on page 37
–“Bits 7:6 – COM0A[1:0]: Compare Match Output A Mode” on page 77
–“Bits 5:4 – COM0B[1:0]: Compare Match Output B Mode” on page 77
–“Bits 2:0 – ADTS[2:0]: ADC Auto Trigge r Source” on page 138
–“SPMCSR – Store Program Memory Control and Status Register” on page 145.
9. Updated description of feature “EEPROM read may fail at low supply voltage / low clock frequency” in
Sections:
–“Errata ATtiny25” on page 19
–“Errata ATtiny45” on page 19
–“Errata ATtiny85” on page 22
10. Updated Package Description in Sections:
–“ATtiny25” on page 11
–“ATtiny45” on page 12
–“ATtiny85” on page 13
11. Updated Package Drawing:
–“S8S1” on page 16
12. Updated Order Codes for:
–“ATtiny25” on page 11
9.8 Rev. 2586J-12/06
1. Updated “Low Power Consumption” on page 1.
2. Updated description of instruction length in “Architectur al Ove r view ” .
3. Updated Flash size in “In-System Re-programmable Flash Program Memory” on
page 15.
4. Updated cross-references in sections “Atomic Byte Programming” , “Erase” and
“Write” , starting on page 17.
5. Updated “Atomic Byte Programming” on page 17.
26
ATtiny25/45/85 [DATASHEET]
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6. Updated “Internal PLL for Fast Peripheral Clock Generation - clkPCK” on page 24.
7. Replaced single clocking system figure with two: Figure 6-2 and Figure 6-3.
8. Updated Table 6-1 on page 25, Table 6-13 on page 30 and Table 6-6 on page 27.
9. Updated “Calibrated Internal Oscillator” on page 27.
10. Updated Table 6-5 on page 26.
11. Updated “ OSCCAL – Oscillator Calibration Register” on page 31.
12. Updated “CLKPR – Clock Prescale Register” on page 32.
13. Updated “Power-down Mode” on page 35.
14. Updated “Bit 0” in “PRR – Power Reduction Register” on page 38.
15. Added footnote to Table 8-3 on page 46.
16. Updated Table 10-5 on page 63.
17. Deleted “Bits 7, 2” in “MCUCR – MCU Control Register” on page 64.
18. Updated and moved section “Timer/Counter0 Prescaler and Clock Sources”, now
located on page 66.
19. Updated “ Timer/Counter1 Initialization for Asynchronous Mode” on page 86.
20. Updated bit description in “PLLCSR – PLL Control and Status Register” on page 94
and “PLLCSR – PLL Control and Status Register” on page 103.
21. Added recommended maximum frequency in“ Prescaling and Conversion Timing” on
page 125.
22. Updated Figure 17-8 on page 129 .
23. Updated “Temperature Measur ement” on page 133.
24. Updated Table 17-3 on page 134.
25. Updated bit R/W descriptions in:
“TIMSK – Timer/Counter Interrupt Mask Register” on page 81,
“TIFR – Timer/Counter Interrupt Flag Register” on page 81,
“TIMSK – Timer/Counter Interrupt Mask Register” on page 92,
“TIFR – Timer/Counter Interrupt Flag Register” on page 93,
“PLLCSR – PLL Control and Status Register” on page 94,
“TIMSK – Timer/Counter Interrupt Mask Register” on page 102,
“TIFR – Timer/Counter Interrupt Flag Register” on page 103,
“PLLCSR – PLL Control and Status Register” on page 103 and
“DIDR0 – Digital Input Disable Register 0” on page 138.
26. Added limitation to “Limitations of debugWIRE” on page 140.
27. Updated “DC Characteristics” on page 161.
28. Updated Table 21-7 on page 166.
29. Updated Figure 21-6 on page 171.
30. Updated Table 21-12 on page 17 1.
31. Updated Table 22-1 on page 177.
32. Updated Table 22-2 on page 177.
33. Updated Table 22-30, Table 22-31 and Table 22-32, starting on page 188.
34. Updated Table 22-33, Table 22-34 and Table 22-35, starting on page 189.
35. Updated Table 22-39 on page 19 2.
36. Updated Table 22-46, Table 22-47, Table 22-48 and Table 22-49.
27
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
9.9 Rev. 2586I-09/06
9.10 Rev. 2586H-06/06
9.11 Rev. 2586G-05/06
9.12 Rev. 2586F-04/06
1. All Characterization data moved to “Electrical Characteristics” on page 161.
2. All Register Descriptions are gathered up in seperate sections in the e nd of each
chapter.
3. Updated Table 11-3 on page 78, Table 11-5 on p age 79, Table 11-6 on pag e 80 and
Table 20-4 on page 148.
4. Updated “Calibrated Internal Oscillator” on page 27.
5. Updated Note in Table 7-1 on page 34.
6. Updated “System Control and Reset” on page 39.
7. Updated Register Descrip tion in “I/O Ports” on page 53.
8. Updated Features in “USI – Universal Serial Interface” on page 108.
9. Upda ted Code Example in “SPI Master Operation Example” on page 110 and “SPI
Slave Operation Exam p le” on pa g e 11 1.
10. Updated “Analog Comparator Multiplexed Input” on page 119.
11. Updated Figure 17-1 on page 123.
12. Updated “Signature Bytes” on page 150.
13. Updated “ E lectrical Characteristics” on page 161.
1. Updated “Calibrated Internal Oscillator” on page 27.
2. Updated Table 6.5.1 on page 31.
3. Added Table 21-2 on page 164.
1. Updated “Internal PLL for Fast Peripheral Clock Generation - clkPCK” on page 24.
2. Updated “Default Clock Source” on page 30.
3. Updated “Low-Frequency Crystal Oscillator” on page 29.
4. Updated “Calibrated Internal Oscillator” on page 27.
5. Updated “Clock Output Buffer” on page 31.
6. Updated “Power Management and Sleep Modes” on page 34.
7. Added “Software BOD Disable” on page 35.
8. Updated Figure 16-1 on page 119.
9. Updated “Bit 6 – ACBG: Analog Comparator Bandgap Select” on page 120.
10. Added note for Table 17-2 on page 125.
11. Updated “Register Summary” on page 7.
1. Updated “Digital Input Enable and Sleep Modes” on page 57.
2. Updated Table 20-16 on page 158.
3. Updated “Ordering Informa tion” on page 11.
28
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
9.13 Rev. 2586E-03/06
9.14 Rev. 2586D-02/06
9.15 Rev. 2586C-06/05
9.16 Rev. 2586B-05/05
9.17 Rev. 2586A-02/05
Initial revision.
1. Updated Features in “Analog to Digital Converter” on page 122.
2. Updated Operation in “Analog to Digital Converter” on page 122.
3. Updated Table 17-2 on page 133.
4. Updated Table 17-3 on page 134.
5. Updated “Errata” on page 19.
1. Updated T able 6-13 on page 30, Table 6-10 on page 29, T able 6-3 on page 26,
Table 6-9 on page 28, Table 6-5 on page 26 , Table 9-1 on page 48,Table 17-4 on
page 135, Table 20-16 on page 158, Table 21-8 on page 167.
2. Updated “Timer/Counter1 in PWM Mode” on page 86.
3. Updated text “Bit 2 – TOV1: Timer/Counter1 Overflow Flag” on page 93.
4. Updated values in “DC Characteristics” on page 161.
5. Updated “Register Summary” on page 7.
6. Updated “Ordering Informa tion” on page 11.
7. Updated Rev B and C in “Errata ATtiny 45 ” on pa ge 19.
8. All references to power-save mode are removed.
9. Updated Register Adress es.
1. Updated “Features” on page 1.
2. Updated Figure 1-1 on page 2.
3. Updated Code Examples on page 18 and page 19.
4. Moved “Temperature Measurement” to Section 17.12 page 133.
5. Updated “Register Summary” on page 7.
6. Updated “Ordering Informa tion” on page 11.
1. CLKI added, instances of EEMWE/EEWE renamed EEMPE/EEPE, removed some
TBD.
Removed “Preliminary Description” from “Temperature Measurement” on page 133.
2. Updated “Features” on page 1.
3. Updated Figure 1-1 on page 2 and Figure 8-1 on page 39.
4. Updated Table 7-2 on page 38, Table 10-4 on page 63, Table 10-5 on page 63
5. Updated “Serial Programming Instruction set” on page 153 .
6. Updated SPH register in “Instruction Set Summary” on page 9.
7. Updated “DC Characteristics” on page 161.
8. Updated “Ordering Informa tion” on page 11.
9. Updated “Errata” on page 19.
29
ATtiny25/45/85 [DATASHEET]
2586QS–AVR–08/2013
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