ATmega8 Atmel Corporation, ATmega8 Datasheet - Page 62

• 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

62
ATmega8(L)
• ADC1 – Port C, Bit 1
PC1 can also be used as ADC input Channel 1. Note that ADC input channel 1 uses analog
power.
• ADC0 – Port C, Bit 0
PC0 can also be used as ADC input Channel 0. Note that ADC input channel 0 uses analog
power.
Table 26
Figure 25 on page
Table 26. Overriding Signals for Alternate Functions in PC6..PC4
Table 27. Overriding Signals for Alternate Functions in PC3..PC0
Note:
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
AIO
1. When enabled, the Two-wire Serial Interface enables slew-rate controls on the output pins
and
PC4 and PC5. This is not shown in the figure. In addition, spike filters are connected between
the AIO outputs shown in the port figure and the digital logic of the TWI module
Table 27
PC6/RESET
RSTDISBL
1
RSTDISBL
0
0
0
RSTDISBL
0
–
RESET INPUT
PC3/ADC3
0
0
0
0
0
0
0
0
–
ADC3 INPUT
56.
relate the alternate functions of Port C to the overriding signals shown in
PC5/SCL/ADC5
TWEN
PORTC5 • PUD
TWEN
SCL_OUT
TWEN
0
0
0
–
ADC5 INPUT / SCL INPUT
PC2/ADC2
0
0
0
0
0
0
0
0
–
ADC2 INPUT
ADC1 INPUT
PC1/ADC1
0
0
0
0
0
0
0
0
–
PC4/SDA/ADC4
TWEN
PORTC4 • PUD
TWEN
SDA_OUT
TWEN
0
0
0
–
ADC4 INPUT / SDA INPUT
(1)
PC0/ADC0
0
0
0
0
0
0
0
0
–
ADC0 INPUT
2486Z–AVR–02/11