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ATMEL Corporation
ATMEL Corporation

ATMEGA8L-8PU Datasheet

8-bit AVR Microcontroller with 8K Bytes In-System Programmable Flash


ATMEGA8L-8PU Datasheet Preview


Features
High-performance, Low-power AVR® 8-bit Microcontroller
Advanced RISC Architecture
– 130 Powerful Instructions – Most Single-clock Cycle Execution
– 32 x 8 General Purpose Working Registers
– Fully Static Operation
– Up to 16 MIPS Throughput at 16 MHz
– On-chip 2-cycle Multiplier
Nonvolatile Program and Data Memories
– 8K Bytes of In-System Self-Programmable Flash
Endurance: 10,000 Write/Erase Cycles
– Optional Boot Code Section with Independent Lock Bits
In-System Programming by On-chip Boot Program
True Read-While-Write Operation
www.DataSheet4U51.c2omBytes EEPROM
Endurance: 100,000 Write/Erase Cycles
– 1K Byte Internal SRAM
– Programming Lock for Software Security
Peripheral Features
– Two 8-bit Timer/Counters with Separate Prescaler, one Compare Mode
– One 16-bit Timer/Counter with Separate Prescaler, Compare Mode, and Capture
Mode
– Real Time Counter with Separate Oscillator
– Three PWM Channels
– 8-channel ADC in TQFP and MLF package
Six Channels 10-bit Accuracy
Two Channels 8-bit Accuracy
– 6-channel ADC in PDIP package
Four Channels 10-bit Accuracy
Two Channels 8-bit Accuracy
– Byte-oriented Two-wire Serial Interface
– Programmable Serial USART
– Master/Slave SPI Serial Interface
– Programmable Watchdog Timer with Separate On-chip Oscillator
– On-chip Analog Comparator
Special Microcontroller Features
– Power-on Reset and Programmable Brown-out Detection
– Internal Calibrated RC Oscillator
– External and Internal Interrupt Sources
– Five Sleep Modes: Idle, ADC Noise Reduction, Power-save, Power-down, and
Standby
I/O and Packages
– 23 Programmable I/O Lines
– 28-lead PDIP, 32-lead TQFP, and 32-pad MLF
Operating Voltages
– 2.7 - 5.5V (ATmega8L)
– 4.5 - 5.5V (ATmega8)
Speed Grades
– 0 - 8 MHz (ATmega8L)
– 0 - 16 MHz (ATmega8)
Power Consumption at 4 Mhz, 3V, 25°C
– Active: 3.6 mA
– Idle Mode: 1.0 mA
– Power-down Mode: 0.5 µA
8-bit
with 8K Bytes
In-System
Programmable
Flash
ATmega8
ATmega8L
Rev. 2486M–AVR–12/03
Page 1

Pin Configurations
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2 ATmega8(L)
PDIP
(RESET) PC6
(RXD) PD0
(TXD) PD1
(INT0) PD2
(INT1) PD3
(XCK/T0) PD4
VCC
GND
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
(T1) PD5
(AIN0) PD6
(AIN1) PD7
(ICP1) PB0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
28 PC5 (ADC5/SCL)
27 PC4 (ADC4/SDA)
26 PC3 (ADC3)
25 PC2 (ADC2)
24 PC1 (ADC1)
23 PC0 (ADC0)
22 GND
21 AREF
20 AVCC
19 PB5 (SCK)
18 PB4 (MISO)
17 PB3 (MOSI/OC2)
16 PB2 (SS/OC1B)
15 PB1 (OC1A)
TQFP Top View
(INT1) PD3
(XCK/T0) PD4
GND
VCC
GND
VCC
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
1
2
3
4
5
6
7
8
24 PC1 (ADC1)
23 PC0 (ADC0)
22 ADC7
21 GND
20 AREF
19 ADC6
18 AVCC
17 PB5 (SCK)
MLF Top View
(INT1) PD3
(XCK/T0) PD4
GND
VCC
GND
VCC
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
1
2
3
4
5
6
7
8
24 PC1 (ADC1)
23 PC0 (ADC0)
22 ADC7
21 GND
20 AREF
19 ADC6
18 AVCC
17 PB5 (SCK)
2486M–AVR–12/03
Page 2

Overview
Block Diagram
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2486M–AVR–12/03
ATmega8(L)
The ATmega8 is a low-power CMOS 8-bit microcontroller based on the AVR RISC
architecture. By executing powerful instructions in a single clock cycle, the ATmega8
achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to
optimize power consumption versus processing speed.
Figure 1. Block Diagram
RESET
VCC
PC0 - PC6
PB0 - PB7
XTAL1
XTAL2
PORTC DRIVERS/BUFFERS
PORTB DRIVERS/BUFFERS
GND
PORTC DIGITAL INTERFACE
PORTB DIGITAL INTERFACE
AGND
AREF
MUX &
ADC
ADC
INTERFACE
PROGRAM
COUNTER
STACK
POINTER
PROGRAM
FLASH
SRAM
INSTRUCTION
REGISTER
INSTRUCTION
DECODER
CONTROL
LINES
AVR CPU
GENERAL
PURPOSE
REGISTERS
X
Y
Z
ALU
STATUS
REGISTER
PROGRAMMING
LOGIC
SPI
+ COMP.
- INTERFACE
TWI
TIMERS/
COUNTERS
OSCILLATOR
INTERNAL
OSCILLATOR
WATCHDOG
TIMER
MCU CTRL.
& TIMING
INTERRUPT
UNIT
OSCILLATOR
EEPROM
USART
PORTD DIGITAL INTERFACE
PORTD DRIVERS/BUFFERS
PD0 - PD7
3
Page 3
Part Number ATMEGA8L-8PU
Manufactur ATMEL Corporation
Description 8-bit AVR Microcontroller with 8K Bytes In-System Programmable Flash
Total Page 70 Pages
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