Features
• High Performance, Low Power AVR
• Advanced RISC Architecture
– 120 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
• High Endurance, Non-Volatile Memory Segments
– 2K/4K Bytes of In-System, Self-Programmable Flash Program Memory
• Endurance: 10,000 Write/Erase Cycles
– 128/256 Bytes of In-System Programmable EEPROM
• Endurance: 100,000 Write/Erase Cycles
– 128/256 Bytes of Internal SRAM
– Data retention: 20 years at 85°C / 100 years at 25°C
– Programming Lock for Self-Programming Flash & EEPROM Data Security
• Peripheral Features
– One 8-Bit and One 16-Bit Timer/Counter with Two PWM Channels, Each
– 10-bit ADC
• 8 Single-Ended Channels
• 12 Differential ADC Channel Pairs with Programmable Gain (1x / 20x)
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-Chip Analog Comparator
– Universal Serial Interface
• Special Microcontroller Features
– debugWIRE On-chip Debug System
– In-System Programmable via SPI Port
– Internal and External Interrupt Sources
• Pin Change Interrupt on 12 Pins
– Low Power Idle, ADC Noise Reduction, Standby and Power-Down Modes
– Enhanced Power-on Reset Circuit
– Programmable Brown-Out Detection Circuit with Software Disable Function
– Internal Calibrated Oscillator
– On-Chip Temperature Sensor
• I/O and Packages
– Available in 20-Pin QFN/MLF/VQFN, 14-Pin SOIC, 14-pin PDIP and 15-ball UFBGA
– Twelve Programmable I/O Lines
• Operating Voltage:
– 1.8 – 5.5V
• Speed Grade:
– 0 – 4 MHz @ 1.8 – 5.5V
– 0 – 10 MHz @ 2.7 – 5.5V
– 0 – 20 MHz @ 4.5 – 5.5V
• Industrial Temperature Range: -40°C to +85°C
• Low Power Consumption
– Active Mode:
• 210 µA at 1.8V and 1MHz
–Idle Mode:
• 33 µA at 1.8V and 1MHz
– Power-Down Mode:
• 0.1 µA at 1.8V and 25°C
®
8-Bit Microcontroller
8-bit
Microcontroller
with 2K/4K
Bytes In-System
Programmable
Flash
ATtiny24A
(Preliminary)
ATtiny44A
Summary
Rev. 8183BS–AVR–03/10
1. Pin Configurations
Figure 1-1. Pinout of ATtiny24A/44A
PDIP/SOIC
VCC
(PCINT8/XTAL1/CLKI) PB0
(PCINT9/XTAL2) PB1
(PCINT11/RESET/dW) PB3
(PCINT10/INT0/OC0A/CKOUT) PB2
(PCINT7/ICP/OC0B/ADC7) PA7
(PCINT6/OC1A/SDA/MOSI/DI/ADC6) PA6
(ADC4/USCK/SCL/T1/PCINT4) PA4
(ADC3/T0/PCINT3) PA3
(ADC2/AIN1/PCINT2) PA2
(ADC1/AIN0/PCINT1) PA1
(ADC0/AREF/PCINT0) PA0
NOTE
Bottom pad should be
soldered to ground.
DNC: Do Not Connect
1
2
3
4
5
6
7
14
13
12
11
10
9
8
QFN/MLF/VQFN
PA 5
DNC
DNC
DNC
2019181716
1
2
3
4
5
678910
DNC
GND
VCC
DNC
GND
PA0 (ADC0/AREF/PCINT0)
PA1 (ADC1/AIN0/PCINT1)
PA2 (ADC2/AIN1/PCINT2)
PA3 (ADC3/T0/PCINT3)
PA4 (ADC4/USCK/SCL/T1/PCINT4)
PA5 (ADC5/DO/MISO/OC1B/PCINT5)
Pin 16: PA6 (PCINT6/OC1A/SDA/MOSI/DI/ADC6)
Pin 20: PA5 (ADC5/DO/MISO/OC1B/PCINT5)
PA 6
15
PA7 (PCINT7/ICP/OC0B/ADC7)
14
PB2 (PCINT10/INT0/OC0A/CKOUT)
13
PB3 (PCINT11/RESET/dW)
12
PB1 (PCINT9/XTAL2)
11
PB0 (PCINT8/XTAL1/CLKI)
DNC
Table 1-1. UFBGA - Pinout ATtiny24A/44A.
1234
A
B PA4 PA7 PB1 PB3
C PA3 PA2 PA1 PB0
D PA0 GND GND VCC
2
ATtiny24A/44A
PA5 PA6 PB2
8183BS–AVR–03/10
1.1 Pin Descriptions
1.1.1 VCC
Supply voltage.
1.1.2 GND
Ground.
1.1.3 Port B (PB3...PB0)
Port B is a 4-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port B output buffers have symmetrical drive characteristics with both high sink and source
capability except PB3 which has the RESET
RESET pin, program (‘0’) RSTDISBL fuse. As inputs, Port B pins that are externally pulled low
will source current if the pull-up resistors are activated. The Port B pins are tri-stated when a
reset condition becomes active, even if the clock is not running.
Port B also serves the functions of various special features of the ATtiny24A/44A as listed in
Section 10.2 “Alternate Port Functions” on page 57.
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 20-4 on page 176. Shorter pulses are not guaranteed to
generate a reset.
ATtiny24A/44A
capability. To use pin PB3 as an I/O pin, instead of
The reset pin can also be used as a (weak) I/O pin.
1.1.5 Port A (PA7...PA0)
Port A is a 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The
Port A output buffers have symmetrical drive characteristics with both high sink and source
capability. As inputs, Port A pins that are externally pulled low will source current if the pull-up
resistors are activated. The Port A pins are tri-stated when a reset condition becomes active,
even if the clock is not running.
Port A has alternate functions as analog inputs for the ADC, analog comparator, timer/counter,
SPI and pin change interrupt as described in “Alternate Port Functions” on page 57.
8183BS–AVR–03/10
3
2. Overview
ATtiny24A/44A are low-power CMOS 8-bit microcontrollers based on the AVR enhanced RISC
architecture. By executing powerful instructions in a single clock cycle, the ATtiny24A/44A
achieves throughputs approaching 1 MIPS per MHz allowing the system designer to optimize
power consumption versus processing speed.
Figure 2-1. Block Diagram
VCC
GND
PROGRAM
COUNTER
PROGRAM
FLASH
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
CONTROL
LINES
PROGRAMMING
LOGIC
STACK
POINTER
SRAM
GENERAL
PURPOSE
REGISTERS
X
Y
Z
ALU
STATUS
REGISTER
ISP INTERFACE
8-BIT DATABUS
INTERNAL
OSCILLATOR
WATCHDOG
TIMER
MCU CONTROL
REGISTER
MCU STATUS
REGISTER
TIMER/
COUNTER0
TIMER/
COUNTER1
INTERRUPT
UNIT
EEPROM
INTERNAL
CALIBRATED
OSCILLATOR
TIMING AND
CONTROL
OSCILLATORS
DATA REGISTER
+
-
PORT A
ANALOG
COMPARATOR
PORT A DRIVERS
PA7-PA0
DATA DIR.
REG.PORT A
ADC
DATA REGISTER
PORT B
PORT B DRIVERS
PB3-PB0
DATA DIR.
REG.PORT B
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.
4
ATtiny24A/44A
8183BS–AVR–03/10
ATtiny24A/44A
The ATtiny24A/44A provides the following features: 2K/4K byte of In-System Programmable
Flash, 128/256 bytes EEPROM, 128/256 bytes SRAM, 12 general purpose I/O lines, 32 general
purpose working registers, an 8-bit Timer/Counter with two PWM channels, a 16-bit timer/counter with two PWM channels, Internal and External Interrupts, a 8-channel 10-bit ADC,
programmable gain stage (1x, 20x) for 12 differential ADC channel pairs, a programmable
Watchdog Timer with internal oscillator, internal calibrated oscillator, and four 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. ADC Noise Reduction
mode minimizes switching noise during ADC conversions by stopping the CPU and all I/O modules except the ADC. In Power-down mode registers keep their contents and all chip functions
are disbaled until the next interrupt or hardware reset. In Standby mode, the crystal/resonator
oscillator is running while the rest of the device is sleeping, allowing very fast start-up combined
with low power consumption.
The device is manufactured using Atmel’s high density non-volatile memory technology. The onchip ISP Flash allows the Program memory to be re-programmed in-system through an SPI
serial interface, by a conventional non-volatile memory programmer or by an on-chip boot code
running on the AVR core.
The ATtiny24A/44A AVR is supported with a full suite of program and system development tools
including: C Compilers, Macro Assemblers, Program Debugger/Simulators and Evaluation kits.
8183BS–AVR–03/10
5
3. Additional Information
3.1 Resources
A comprehensive set of drivers, application notes, data sheets and descriptions on development
tools are available for download at http://www.atmel.com/avr.
3.2 Code Examples
This documentation contains simple code examples that briefly show how to use various parts of
the device. These code examples assume that the part specific header file is included before
compilation. Be aware that not all C compiler vendors include bit definitions in the header files
and interrupt handling 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 “SBI”
instructions 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 Data Retention
3.4 Disclaimer
Reliability Qualification results show that the projected data retention failure rate is much less
than 1 PPM over 20 years at 85°C or 100 years at 25°C.
Typical values contained in this datasheet are based on simulations and characterization of
other AVR microcontrollers manufactured on the same process technology. Min and Max values
will be available after the device has been characterized.
6
ATtiny24A/44A
8183BS–AVR–03/10
ATtiny24A/44A
4. Register Summary
Address Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Page
0x3F (0x5F) SREG I T H S V N Z C Page 14
0x3E (0x5E) SPH – – – – – – SP9 SP8 Page 13
0x3D (0x5D) SPL SP7 SP6 SP5 SP4 SP3 SP2 SP1 SP0 Page 13
0x3C (0x5C) OCR0B
0x3B (0x5B) GIMSK – INT0 PCIE1
0x3A (0x5A) GIFR – INTF0 PCIF1
0x39 (0x59) TIMSK0 – – – – – OCIE0B OCIE0A TOIE0 Page 83
0x38 (0x58) TIFR0 – – – – OCF0B OCF0A TOV0 Page 83
0x37 (0x57) SPMCSR – – RSIG CTPB RFLB PGWRT PGERS SPMEN Page 156
0x36 (0x56) OCR0A
0x35 (0x55) MCUCR BODS PUD SE SM1 SM0 BODSE ISC01 ISC00 Pages 35, 49, 65
0x34 (0x54) MCUSR – – – – WDRF BORF EXTRF PORF Page 43
0x33 (0x53) TCCR0B FOC0A FOC0B – – WGM02 CS02 CS01 CS00 Page 81
0x32 (0x52) TCNT0 Timer/Counter0 Page 82
0x31 (0x51) OSCCALCAL7CAL6CAL5CAL4CAL3CAL2CAL1CAL0 Page 29
0x30 (0x50) TCCR0A COM0A1 COM0A0 COM0B1 COM0B0 – WGM01 WGM00 Page 78
0x2F (0x4F) TCCR1A COM1A1 COM1A0 COM1B1 COM1B0 – WGM11 WGM10 Page 106
0x2E (0x4E) TCCR1B ICNC1 ICES1 – WGM13 WGM12 CS12 CS11 CS10 Page 108
0x2D (0x4D) TCNT1H Timer/Counter1 – Counter Register High Byte Page 110
0x2C (0x4C) TCNT1L Timer/Counter1 – Counter Register Low Byte Page 110
0x2B (0x4B) OCR1AH Timer/Counter1 – Compare Register A High Byte Page 110
0x2A (0x4A) OCR1AL Timer/Counter1 – Compare Register A Low Byte Page 110
0x29 (0x49) OCR1BH Timer/Counter1 – Compare Register B High Byte Page 110
0x28 (0x48) OCR1BL Timer/Counter1 – Compare Register B Low Byte Page 110
0x27 (0x47) DWDR DWDR[7:0] Page 151
0x26 (0x46) CLKPR CLKPCE – – – CLKPS3 CLKPS2 CLKPS1 CLKPS0 Page 30
0x25 (0x45) ICR1H Timer/Counter1 - Input Capture Register High Byte Page 111
0x24 (0x44) ICR1L Timer/Counter1 - Input Capture Register Low Byte Page 111
0x23 (0x43) GTCCR TSM – – – – – – PSR10 Page 114
0x22 (0x42) TCCR1C FOC1A FOC1B – – – – – – Page 109
0x21 (0x41) WDTCSR WDIF WDIE WDP3 WDCE WDE WDP2 WDP1 WDP0 Page 43
0x20 (0x40) PCMSK1 – – – – PCINT11 PCINT10 PCINT9 PCINT8 Page 50
0x1F (0x3F) Reserved – – – – – – – –
0x1E (0x3E) EEARL EEAR7 EEAR6 EEAR5 EEAR4 EEAR3 EEAR2 EEAR1 EEAR0 Page 20
0x1D (0x3D) EEDR EEPROM Data Register Page 21
0x1C (0x3C) EECR – – EEPM1 EEPM0 EERIE EEMPE EEPE EERE Page 22
0x1B (0x3B) PORTA PORTA7 PORTA6 PORTA5 PORTA4 PORTA3 PORTA2 PORTA1 PORTA0 Page 65
0x1A (0x3A) DDRA DDA7 DDA6 DDA5 DDA4 DDA3 DDA2 DDA1 DDA0 Page 65
0x19 (0x39) PINA PINA7 PINA6 PINA5 PIN A4 PINA3 PINA2 PINA1 PINA0 Page 66
0x18 (0x38) PORTB – – – – PORTB3 PORTB2 PORTB1 PORTB0 Page 66
0x17 (0x37) DDRB – – – – DDB3 DDB2 DDB1 DDB0 Page 66
0x16 (0x36) PINB
0x15 (0x35) GPIOR2 General Purpose I/O Register 2 Page 22
0x14 (0x34) GPIOR1 General Purpose I/O Register 1 Page 22
0x13 (0x33) GPIOR0 General Purpose I/O Register 0 Page 22
0x12 (0x32) PCMSK0 PCINT7 PCINT6 PCINT5 PCINT4 PCINT3 PCINT2 PCINT1 PCINT0 Page 51
0x11 (0x31)) Reserved –
0x10 (0x30) USIBR USI Buffer Register Page 127
0x0F (0x2F) USIDR USI Data Register Page 126
0x0E (0x2E) USISR USISIF USIOIF USIPF USIDC USICNT3 USICNT2 USICNT1 USICNT0 Page 125
0x0D (0x2D) USICR USISIE USIOIE USIWM1 USIWM0 USICS1 USICS0 USICLK USITC Page 123
0x0C (0x2C) TIMSK1 – –ICIE1– – OCIE1B OCIE1A TOIE1 Page 111
0x0B (0x2B) TIFR1 – –ICF1– – OCF1B OCF1A TOV1 Page 112
0x0A (0x2A) Reserved
0x09 (0x29) Reserved
0x08 (0x28) ACSR ACD ACBG
0x07 (0x27) ADMUX REFS1 REFS0 MUX5 MUX4 MUX3 MUX2 MUX1 MUX0 Page 144
0x06 (0x26) ADCSRA ADEN ADSC
0x05 (0x25) ADCH ADC Data Register High Byte Page 148
0x04 (0x24) ADCL ADC Data Register Low Byte Page 148
0x03 (0x23) ADCSRB BIN ACME –ADLAR– ADTS2 ADTS1 AD TS0 Pages 130, 148
0x02 (0x22) Reserved
0x01 (0x21) DIDR0 ADC7D ADC6D ADC5D ADC4D ADC 3D ADC2D ADC1D ADC0D Pages 131, 149
0x00 (0x20) PRR
– – – – PINB3 PINB2 PINB1 PINB0 Page 66
– – – – PRTIM1 PRTIM0 PRUSI PRADC Page 36
Timer/Counter0 – Output Compare Register B
Timer/Counter0 – Output Compare Register A
ACO ACI ACIE ACIC ACIS1 ACIS0 Page 129
ADATE ADIF ADIE ADPS2 ADPS1 ADPS0 Page 146
PCIE0
PCIF0
– – – – Page 49
– – – – Page 50
–
–
–
Page 83
Page 82
8183BS–AVR–03/10
7
Note: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses
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.
8
ATtiny24A/44A
8183BS–AVR–03/10
ATtiny24A/44A
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 Regi sters Rd ← Rd • Rr Z,N,V 1
ANDI Rd, K Logical AND Register and 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 Relative Subroutine 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 Skip 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 PC←PC+k + 1 None 1/2
BRBC s, k Branch if Status Flag Cleared if (SREG(s) = 0) then PC←PC+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 Cleared 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)
LSR Rd Logical Shift Right Rd(n) ← Rd(n+1), Rd(7) ← 0 Z,C,N,V 1
ROL Rd Rotate Left Through Carry Rd(0)←C,Rd(n+1)← Rd(n),C←Rd(7) Z,C,N,V 1
← 0 Z,C,N,V 1
8183BS–AVR–03/10
9
Mnemonics Operands Description Operation Flags #Clocks
ROR Rd Rotate Right Through Carry Rd(7)←C,Rd(n)← Rd(n+1),C←Rd(0) Z,C,N,V 1
ASR Rd Arithmetic Shift Right Rd(n) ← Rd(n+1), n=0..6 Z,C,N,V 1
SWAP Rd Swap Nibbles 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 Complement 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 SREG H ← 0 H
DATA TRANSFER INSTRUCTIONS
MOV Rd, Rr Move Between Registers Rd ← Rr None 1
MOVW Rd, Rr Copy Register Word
LDI Rd, K Load Immediate Rd ← KNone1
LD Rd, X Load 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 Load 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 Prog ram Memory R0 ← (Z) None 3
LPM Rd, Z Load Program Memory Rd ← (Z) None 3
LPM Rd, Z+ Load 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 Register from 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
Rd+1:Rd ← Rr+1:Rr
None 1
1
10
ATtiny24A/44A
8183BS–AVR–03/10
6. Ordering Information
6.1 ATtiny24A
Speed (MHz) Power Supply Ordering Code
ATtiny24A-SSU
ATtiny24A-SSUR
ATtiny24A-PU
ATtiny24A-CCU
20 1.8 - 5.5V
Notes: 1. Code indicators:
– H: NiPdAu lead finish
– U: matte tin
– R: tape & reel
2. All packages are Pb-free, halide-free and fully green and they comply with the European directive for Restriction of Hazardous Substances (RoHS).
3. Topside marking for ATtiny24A:
– 1st Line: T24
– 2nd Line: Axx
– 3rd Line: xxx
4. These devices can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information and minimum quantities.
ATtiny24A-CCUR
ATtiny24A-MU
ATtiny24A-MUR
ATtiny24A-MMH
ATtiny24A-MMHR
ATtiny24A/44A
(1)
(3)
(3)
Package
14S1
14S1
14P3
15CC1
15CC1
20M1
20M1
20M2
20M2
(2)
Operational Range
Industrial
(-40°C to 85°C)
(4)
Package Type
14S1
14P3
15CC1
20M1 20-pad, 4 x 4 x 0.8 mm Body, Quad Flat No Lead / Micro Lead Frame Package (QFN/MLF)
20M2 20-pad, 3 x 3 x 0.85 mm Body, Very Thin Quad Flat No Lead Package (VQFN)
8183BS–AVR–03/10
14-lead, 0.150" Wide Body, Plastic Gull Wing Small Outline Package (SOIC)
14-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
15-ball (4 x 4 Array), 0.65 mm Pitch, 3.0 x 3.0 x 0.6 mm, Ultra Thin, Fine-Pitch Ball Grid Array Package (UFBGA)
11
6.2 ATtiny44A
Speed (MHz) Power Supply Ordering Code
ATtiny44A-SSU
ATtiny44A-SSUR
ATtiny44A-PU
ATtiny44A-CCU
20 1.8 - 5.5V
Notes: 1. Code indicators:
– H: NiPdAu lead finish
– U: matte tin
– R: tape & reel
2. All packages are Pb-free, halide-free and fully green and they comply with the European directive for Restriction of Hazardous Substances (RoHS).
3. Topside marking for ATtiny44A:
– 1st Line: T44
– 2nd Line: Axx
– 3rd Line: xxx
4. These devices can also be supplied in wafer form. Please contact your local Atmel sales office for detailed ordering information and minimum quantities.
ATtiny44A-CCUR
ATtiny44A-MU
ATtiny44A-MUR
ATtiny44A-MMH
ATtiny44A-MMHR
(1)
Package
(2)
Operational Range
14S1
14S1
14P3
15CC1
15CC1
20M1
(3)
(3)
20M1
20M2
20M2
Industrial
(-40°C to 85°C)
(4)
Package Type
14S1
14P3
15CC1
14-lead, 0.150" Wide Body, Plastic Gull Wing Small Outline Package (SOIC)
14-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP)
15-ball (4 x 4 Array), 0.65 mm Pitch, 3.0 x 3.0 x 0.6 mm, Ultra Thin, Fine-Pitch Ball Grid Array Package (UFBGA)
20M1 20-pad, 4 x 4 x 0.8 mm Body, Quad Flat No-Lead / Micro Lead Frame Package (QFN/MLF)
20M2 20-pad, 3 x 3 x 0.85 mm Body, Very Thin Quad Flat No Lead Package (VQFN)
12
ATtiny24A/44A
8183BS–AVR–03/10
7. Packaging Information
2325 Orchard Parkway
San Jose, CA 95131
TITLE
DRAWING NO.
R
REV.
14S1, 14-lead, 0.150" Wide Body, Plastic Gull
Wing Small Outline Package (SOIC)
2/5/02
14S1
A
A1
E
L
Side View
Top View
End View
H
E
b
N
1
e
A
D
COMMON DIMENSIONS
(Unit of Measure = mm/inches)
SYMBOL
MIN
NOM
MAX
NOTE
Notes: 1. This drawing is for general information only; refer to JEDEC Drawing MS-012, Variation AB for additional information.
2. Dimension D does not include mold Flash, protrusions or gate burrs. Mold Flash, protrusion and gate burrs shall not
exceed 0.15 mm (0.006") per side.
3. Dimension E does not include inter-lead Flash or protrusion. Inter-lead flash and protrusions shall not exceed 0.25 mm
(0.010") per side.
4. L is the length of the terminal for soldering to a substrate.
5. The lead width B, as measured 0.36 mm (0.014") or greater above the seating plane, shall not exceed a maximum value
of 0.61 mm (0.024") per side.
A 1.35/0.0532 – 1.75/0.0688
A1 0.1/.0040 – 0.25/0.0098
b 0.33/0.0130 – 0.5/0.0200 5
D 8.55/0.3367 – 8.74/0.3444 2
E3.8/0.1497 – 3.99/0.1574 3
H5.8/0.2284 – 6.19/0.2440
L 0.41/0.0160 – 1.27/0.0500 4
e 1.27/0.050 BSC
7.1 14S1
ATtiny24A/44A
8183BS–AVR–03/10
13
7.2 14P3
PIN
1
E1
A1
B
E
B1
C
L
SEATING PLANE
A
D
e
eC
eB
Notes: 1. This package conforms to JEDEC reference MS-001, Variation AA.
2. Dimensions D and E1 do not include mold Flash or Protrusion.
Mold Flash or Protrusion shall not exceed 0.25 mm (0.010").
TITLE
2325 Orchard Parkway
R
San Jose, CA 95131
14P3, 14-lead (0.300"/7.62 mm Wide) Plastic Dual
Inline Package (PDIP)
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
A – – 5.334
A1 0.381 – –
D 18.669 – 19.685 Note 2
E 7.620 – 8.255
E1 6.096 – 7.112 Note 2
B 0.356 – 0.559
B1 1.143 – 1.778
L 2.921 – 3.810
C 0.203 – 0.356
eB – – 10.922
eC 0.000 – 1.524
e 2.540 TYP
MIN
NOM
MAX
DRAWING NO.
14P3
NOTE
11/02/05
REV.
A
14
ATtiny24A/44A
8183BS–AVR–03/10
7.3 15CC1
TITLE
DRAWING NO. GPC
REV.
Package Drawing Contact:
packagedrawings@atmel.com
B
CBC
15CC1, 15-ball (4 x 4 Array), 3.0 x 3.0 x 0.6mm
package, ball pitch 0.65mm,
Ultra thin, Fine-Pitch Ball Grid Array Package (UFBGA)
15CC1
27/07/09
A – – 0.6
A1 0.05 0.010 0.015
A2 0.43 REF
b 0.25 0.30 0.35 1
b1 0.25 – – 2
D 2.90 3.00 3.10
D1 1.95 BSC
E 2.90 3.00 3.10
E1 1.95 BSC
e 0.65 BSC
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
TOP VIEW
123 4
A
B
C
D
E
D
15-Øb
D
C
B
A
Pin#1 ID
0.08
A1
A
D1
E1
A2
A1 Ball Corner
e
123 4
SIDE VIEW
b1
BOTTOM VIEW
Note1:
Dimention “b” is measured at the maximum ball dia. in a plane parallel
to the seating plane.
Note2:
Dimention “b1” is the solderable surface defined by the opening of the
solder resist layer.
ATtiny24A/44A
8183BS–AVR–03/10
15
7.4 20M1
1
2
D
Pin 1 ID
3
E
TOP VIEW
D2
1
Pin #1
Notch
(0.20 R)
2
3
E2
b
L
e
BOTTOM VIE W
Reference JEDEC Standard MO-220, Fig. 1 (SAW Singulation) WGGD-5.
Note:
SIDE VIEW
A2
A1
A
0.08
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
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
MIN
NOM
C
MAX
NOTE
16
2325 Orchard Parkway
R
San Jose, CA 95131
20M1, 20-pad, 4 x 4 x 0.8 mm Body, Lead Pitch 0.50 mm,
2.6 mm Exposed Pad, Micro Lead Frame Package (MLF)
ATtiny24A/44A
TITLE
DRAWING NO.
20M1
8183BS–AVR–03/10
10/27/04
REV.
A
7.5 20M2
TITLE
DRAWING NO. GPC
REV.
Package Drawing Contact:
packagedrawings@atmel.com
20M2 ZFC B
20M2, 20-pad, 3 x 3 x 0.85 mm Body, Lead Pitch 0.45 mm,
1.55 x 1.55 mm Exposed Pad, Thermally Enhanced
Plastic Very Thin Quad Flat No Lead Package (VQFN)
10/24/08
15
14
13
12
11
1
2
3
4
5
16 17 18 19 20
10 9 8 7 6
D2
E2
e
b
K
L
Pin #1 Chamfer
(C 0.3)
D
E
SIDE VIEW
A1
y
Pin 1 ID
BOTTOM VIEW
TOP VIEW
A1
A
C
C0.18 (8X)
0.3 Ref (4x)
COMMON DIMENSIONS
(Unit of Measure = mm)
SYMBOL
MIN
NOM
MAX
NOTE
A 0.75 0.80 0.85
A1 0.00 0.02 0.05
b 0.17 0.22 0.27
C 0.152
D 2.90 3.00 3.10
D2 1.40 1.55 1.70
E 2.90 3.00 3.10
E2 1.40 1.55 1.70
e – 0.45 –
L 0.35 0.40 0.45
K 0.20 – –
y 0.00 – 0.08
ATtiny24A/44A
8183BS–AVR–03/10
17
8. Errata
8.1 ATtiny24A
8.1.1 Rev. H
8.1.2 Rev. G
8.1.3 Rev. F
8.2 ATtiny44A
8.2.1 Rev. F
8.2.2 Rev. E
The revision letters in this section refer to the revision of the corresponding ATtiny24A/44A
device.
No known errata.
Not sampled.
Not sampled.
No known errata.
Not sampled.
18
ATtiny24A/44A
8183BS–AVR–03/10
9. Datasheet Revision History
9.1 Rev. 8183B – 03/10
1. Updated template.
2. Added UFBGA package (15CC1) in: “Features” on page 1, “Pin Configurations” on
page 2, Section 6. “Ordering Information” on page 11, and Section 7.3 “15CC1” on
page 15.
3. Separated typical characteristic plots, added Section 21.2 “ATtiny24A” on page 183.
4. Updated sections:
– Section 14.5.4 “USIBR – USI Buffer Register” on page 127, header updated
– Section 6. “Ordering Information” on page 11, added tape & reel and topside
marking, updated notes
5. Updated Figures:
– Figure 4-1 “Block Diagram of the AVR Architecture” on page 7
– Figure 8-1 “Reset Logic” on page 37
– Figure 14-1 “Universal Serial Interface, Block Diagram” on page 116, USIDB ->
USIBR
– Figure 19-5 “High-voltage Serial Programming Waveforms” on page 169
6. Updated Tables:
– Table 19-11, “Minimum Wait Delay Before Writing the Next Flash or EEPROM
Location,” on page 164, updated value for t
WD_ERASE
ATtiny24A/44A
9.2 Rev. 8183A – 12/08
1. Initial revision. Created from document 8006H.
2. Updated "Ordering Information" on page 18 and page 18. Pb-plated packages are no
3. Updated data sheet template.
4. Removed all references to 8K device.
5. Updated characteristic plots of section “Typical Characteristics”, starting on page 182.
6. Added characteristic plots:
7. Updated sections:
longer offered and there are no separate ordering codes for commercial operation
range, the only available option now is industrial. Also, updated some order codes to
reflect changes in leadframe composition and added VQFN package option.
– “Internal Bandgap Voltage vs. Supply Voltage” on page 233
– “Internal Bandgap Voltage vs. Temperature” on page 233
– “Features” on page 1
– “Power Reduction Register” on page 34
– “Analog Comparator” on page 128
– “Features” on page 132
– “Operation” on page 133
– “Starting a Conversion” on page 134
– “ADC Voltage Reference” on page 139
8183BS–AVR–03/10
19
– “Speed Grades” on page 174
8. Updated Figures:
– “Program Memory Map” on page 15
– “Data Memory Map” on page 16
9. Update Tables:
– “Device Signature Bytes” on page 161
– “DC Characteristics. T
– “Additional Current Consumption for the different I/O modules (absolute values)” on
page 182
– “Additional Current Consumption (percentage) in Active and Idle mode” on page 183
= -40°C to +85°C” on page 173
A
20
ATtiny24A/44A
8183BS–AVR–03/10
ATtiny24A/44A
8183BS–AVR–03/10
21
Headquarters International
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131
USA
Tel: 1(408) 441-0311
Fax: 1(408) 487-2600
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Fax: (852) 2722-1369
Product Contact
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Literature Requests
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Fax: (33) 1-30-60-71-11
Technical Support
avr@atmel.com
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Japan
Tel: (81) 3-3523-3551
Fax: (81) 3-3523-7581
Sales Contact
www.atmel.com/contacts
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any
intellectual property right is granted by this document or in connection with the sale of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDI-
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OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no
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8183BS–AVR–03/10
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