1

Features

– 90 Powerful Instructions – Most Single Clock Cycle Execution

– 32 x 8 General-purpose Working Registers

– Up to 4 MIPS Throughput at 4 MHz

– 2K Bytes of Flash Program Memory

– Endurance: 1,000 Write/Erase Cycles

– Programming Lock for Flash Program Data Security

– Interrupt and Wake-up on Low-level Input

– One 8-bit Timer/Counter with Separate Prescaler

– On-chip Analog Comparator

– Programmable Watchdog Timer with On-chip Oscillator

– Built-in High-current LED Driver with Programmable Modulation

– Low-power Idle and Power-down Modes

– External and Internal Interrupt Sources

– Power-on Reset Circuit with Programmable Start-up Time

– Internal Calibrated RC Oscillator

– Active: 3.0 mA

– Idle Mode: 1.2 mA

– Power-down Mode: <1 µA

– 11 Programmable I/O Lines, 8 Input Lines and a High-current LED Driver

– 28-lead PDIP, 32-lead TQFP, and 32-pad MLF

–V

– 0 - 1.2 MHz for the ATtiny28V

– 0 - 4 MHz For the ATtiny28L

Pin Configurations

PDIP

RESET

PD0

PD1

PD2

PD3

PD4

VCC

GND

XTAL1

XTAL2

PD5

PD6

PD7

(AIN0) PB0

PA0

PA1

PA3

PA2 (IR)

PB7

PB6

GND

NC

VCC

PB5

PB4 (INT1)

PB3 (INT0)

PB2 (T0)

PB1 (AIN1)

1

2

3

4

5

6

7

8

9

10

11

12

13

14

28

27

26

25

24

23

22

21

20

19

18

17

16

15

TQFP/QFN/MLF

1

2

3

4

5

6

7

8

24

23

22

21

20

19

18

17

PD3

PD4

NC

VCC

GND

NC

XTAL1

XTAL2

PB7

PB6

NC

GND

NC

NC

VCC

PB5

8-bit

Microcontroller

with 2K Bytes of

Flash

ATtiny28L

ATtiny28V

Summary

Rev. 1062FS–AVR–07/06

Note: This is a summary document. A complete document

is available on our Web site at www.atmel.com.