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Atmel
ATMega8- 8 bit AVR Microcontroller with 8k Bytes In-System Programmable Flash
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Photograph
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Features
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 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
- Up to 6 MIPS Throughput at 16MHz
- Fully Static Operation
- On-chip 2-cycle Multiplier
Nonvolatile Program and Data Memories
- 8k Bytes of In-System Self-Programmable Flash
- Optional Boot Code Section with Independent Lock Bits
- 512K Bytes EEPROM
- Programming Lock for Software Security
- 1K Byte Internal SRAM
Peripheral Features
- On-chip Analog Comparator
- Programmable Watchdog Timer with Seperate On-chip Oscillator
- Master/Slave SPI Serial Interface
- Two 8-bit Timer/Counters with Separate Prescalar, Compare
- One 16-bit TImer/Counter with Seperate Prescaler, Compare and Capture mode
- Real TIme Counter with Seperate Oscillator
- Three PWM Channels
- 8-channel ADC in TQFP and MLF package
- 6-channel ADC in PDIP package
- Byte-oriented Two-wire Serial Interface
- Programmable Serial USART
Special Mircocontroller Features
- Power-on Reset and Programmable Brown-out Detection
- Internal Calibrated RC Oscillator
- External and Internal Interrupt Sources
- Five Sleep Modes: Idle, ADCNoise Reduction, Power-save, Power-down and Standby
I/O and Packages
- 23 Programmable I/O Lines
- 28-lead PDIP, 32-lead TQFP, 32-pad MLF
Operating Voltages
- 4.5-5.5V for ATmega8
Speed Grades
- 0-16 MHz for ATmega8
Power Consumption at 4 Mhz, 3V, 35 °C
- Active: 3.6mA
- Idle Mode: 10mA
- Power-down Mode: 0.5 µA
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Pin Description
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| Pin Number |
Description |
| 1 |
(RESET) PC6 |
| 2 |
(RXD) PD0 |
| 3 |
(TXD) PD1 |
| 4 |
(INT0) PD2 |
| 5 |
(INT1) PD3 |
| 6 |
(XCK/T0) PD4 |
| 7 |
VCC |
| 8 |
GND |
| 9 |
(XTAL1/TOSC1) PB6 |
| 10 |
(XTAL2/TOSC2) PB7 |
| 11 |
(T1)PD5 |
| 12 |
(AIN0) PD6 |
| 13 |
(AIN1) PD7 |
| 14 |
(ICP1) PB0 |
| 15 |
(OC1A) PB1 |
| 16 |
(SS/OC1B) PB2 |
| 17 |
(MOSI/OC2) PB3 |
| 18 |
(MISO) PB4 |
| 19 |
(SCK) PB5 |
| 20 |
AVCC |
| 21 |
AREF |
| 22 |
GND |
| 23 |
(ADC0) PC0 |
| 24 |
(ADC1) PC1 |
| 25 |
(ADC2) PC2 |
| 26 |
(ADC3) PC3 |
| 27 |
(ADC4/SDA) PC4 |
| 28 |
(ADC5/SCL) PC5 |
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Pin Layout
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Dimensional Drawing
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Technical Data
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Data Sheet
| Atmel - Data Sheet for ATMega8 |
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Application Notes
| Atmel - AVR Application Notes |
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Integrated Circuits