The ATmega8A is a low-power CMOS 8-bit microcontroller based on the AVR RISC architecture. By executing powerful instructions in a single clock cycle, the ATmega8A achieves throughputs approaching 1 MIPS per MHz, allowing the system designer to optimize power consumption versus processing speed.
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
- High Endurance Non-volatile Memory segments
- 8K Bytes of In-System Self-programmable Flash program memory
- 512 Bytes EEPROM
- 1K Byte Internal SRAM
- Write/Erase Cycles: 10,000 Flash/100,000 EEPROM
- Data retention: 20 years at 85°C/100 years at 25°C
- Optional Boot Code Section with Independent Lock Bits
- In-System Programming by On-chip Boot Program
- True Read-While-Write Operation
- 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 QFN/MLF package
- Eight Channels 10-bit Accuracy
- 6-channel ADC in PDIP package
- Six Channels 10-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
- Operating Voltages
- Speed Grades
- Power Consumption at 4 Mhz, 3V, 25°C
- Active: 3.6 mA
- Idle Mode: 1.0 mA
- Power-down Mode: 0.5 μA
Flash: |
8 KBytes |
EEPROM: |
512 Bytes |
SRAM: |
1024 Bytes |
Max I/O Pins: |
23 |
Frequency Max: |
16 MHz |
VCC: |
2.7-5.5 |
10-bit A/D Channels: |
6 |
Analog Comparator: |
Yes |
16-bit Timers: |
1 |
8-bit Timer: |
2 |
Brown Out Detector: |
Yes |
Ext Interrupts: |
2 |
Hardware Multiplier: |
Yes |
Interrupts: |
18 |
ISP: |
Yes |
On Chip Oscillator: |
Yes |
PWM Channels: |
3 |
RTC: |
Yes |
Self Program Memory: |
Yes |
SPI: |
1 |
TWI: |
Yes |
UART: |
1 |
Watchdog: |
Yes |
Package: |
Lead Free PDIP 28 |