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Features
• Utilizes the AVR
®
RISC Architecture
• AVR – High-performance and Low-power RISC Architecture
– 90 Powerful Instructions – Most Single Clock Cycle Execution
– 32 x 8 General-purpose Working Registers
– Up to 4 MIPS Throughput at 4 MHz
• Nonvolatile Program Memory
– 2K Bytes of Flash Program Memory
– Endurance: 1,000 Write/Erase Cycles
– Programming Lock for Flash Program Data Security
• Peripheral Features
– 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
• Special Microcontroller Features
– 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
• Power Consumption at 1 MHz, 2V, 25°C
– Active: 3.0 mA
– Idle Mode: 1.2 mA
– Power-down Mode: <1 µA
• I/O and Packages
– 11 Programmable I/O Lines, 8 Input Lines and a High-current LED Driver
– 28-lead PDIP, 32-lead TQFP, and 32-pad MLF
• Operating Voltages
–V
CC
: 1.8V - 5.5V for the ATtiny28V
–V
CC
: 2.7V - 5.5V for the ATtiny28L
• Speed Grades
– 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
32
31
30
29
28
27
26
25
9
10
11
12
13
14
15
16
PD5
PD6
PD7
(AIN0) PB0
(AIN1) PB1
(T0) PB2
(INT0) PB3
(INT1) PB4
PD2
PD1
PD0
RESET
PA0
PA1
PA3
PA2 (IR)
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.
