ATmega8A Atmel Corporation, ATmega8A Datasheet - Page 2

• Manufacturer Part Number: ATmega8A
• Manufacturer: Atmel Corporation

Specifications of ATmega8A

• Flash (kbytes): 8 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 23
• Ext Interrupts: 2
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• Eeprom (bytes): 512
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 3
• Pwm Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

1. Pin Configurations
8159D–AVR–02/11
Figure 1-1.
Pinout ATmega8A
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
(XCK/T0) PD4
(XCK/T0) PD4
(INT1) PD3
(INT1) PD3
(XTAL1/TOSC1) PB6
(XTAL2/TOSC2) PB7
GND
GND
GND
GND
VCC
VCC
VCC
VCC
(XCK/T0) PD4
(RESET) PC6
(AIN0) PD6
(AIN1) PD7
(INT0) PD2
(INT1) PD3
(ICP1) PB0
(RXD) PD0
(TXD) PD1
(T1) PD5
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
GND
VCC
TQFP Top View
MLF Top View
1
2
3
4
5
6
7
8
9
10
11
12
13
14
PDIP
28
27
26
25
24
23
22
21
20
19
18
17
16
15
PC5 (ADC5/SCL)
PC4 (ADC4/SDA)
PC3 (ADC3)
PC2 (ADC2)
PC1 (ADC1)
PC0 (ADC0)
GND
AREF
AVCC
PB5 (SCK)
PB4 (MISO)
PB3 (MOSI/OC2)
PB2 (SS/OC1B)
PB1 (OC1A)
24
23
22
21
20
19
18
17
24
23
22
21
20
19
18
17
NOTE:
The large center pad underneath the MLF
packages is made of metal and internally
connected to GND. It should be soldered
or glued to the PCB to ensure good
mechanical stability. If the center pad is
left unconneted, the package might
loosen from the PCB.
PC1 (ADC1)
PC0 (ADC0)
ADC7
GND
AREF
ADC6
AVCC
PB5 (SCK)
PC1 (ADC1)
PC0 (ADC0)
ADC7
GND
AREF
ADC6
AVCC
PB5 (SCK)
ATmega8A
2