ATmega8 Atmel Corporation, ATmega8 Datasheet - Page 60

• Manufacturer Part Number: ATmega8
• Manufacturer: Atmel Corporation

Specifications of ATmega8

• 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
• Output Compare Channels: 3
• Input Capture Channels: 1
• Pwm Channels: 3
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

60
ATmega8(L)
Table 23. Overriding Signals for Alternate Functions in PB7..PB4
Notes:
Table 24. Overriding Signals for Alternate Functions in PB3..PB0
Signal
Name
PUOE
PUO
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Signal
Name
PUOE
PUO
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
1. INTRC means that the internal RC Oscillator is selected (by the CKSEL Fuse)
2. EXT means that the external RC Oscillator or an external clock is selected (by the CKSEL
PB7/XTAL2/
TOSC2
EXT • (INTRC +
AS2)
0
EXT • (INTRC +
AS2)
0
0
0
EXT • (INTRC +
AS2)
0
–
Oscillator Output
PB3/MOSI/OC2
SPE • MSTR
PORTB3 • PUD
SPE • MSTR
0
SPE • MSTR +
OC2 ENABLE
SPI MSTR OUTPUT + OC2
0
0
SPI SLAVE INPUT
–
Fuse)
(1)(2)
PB6/XTAL1/
TOSC1
INTRC + AS2
0
INTRC + AS2
0
0
0
INTRC + AS2
0
–
Oscillator/Clock
Input
(1)
PB2/SS/OC1B
SPE • MSTR
PORTB2 • PUD
SPE • MSTR
0
OC1B ENABLE
OC1B
0
0
SPI SS
–
PB5/SCK
SPE • MSTR
PORTB5 • PUD
SPE • MSTR
0
SPE • MSTR
SCK OUTPUT
0
0
SCK INPUT
–
PB1/OC1A
0
0
0
0
OC1A ENABLE
OC1A
0
0
–
–
PB4/MISO
SPE • MSTR
PORTB4 • PUD
SPE • MSTR
0
SPE • MSTR
SPI SLAVE OUTPUT
0
0
SPI MSTR INPUT
–
PB0/ICP1
0
0
0
0
0
0
0
0
ICP1 INPUT
–
2486Z–AVR–02/11