Datasheet

8024A–AVR–04/08

ATmega8HVA/16HVA

15.3.1 Alternate Functions of Port A

The Port A pins with alternate functions are shown in Table 15-3.

The alternate pin configuration is as follows:

• ADC0/ SNGD/ T0 – Port A, Bit 0

Voltage Analog to Digital Converter (Channel 0), Signal Ground for Voltage Analog to Digital

Converter or Timer/Counter0 Counter Source.

• ADC1/ SNGD/ T1 – Port A, Bit 1

Voltage Analog to Digital Converter (Channel 1) , Signal Ground for Voltage Analog to Digital

Converter or Timer/Counter1 Counter Source.

Table 15-4 relates the alternate functions of Port A to the overriding signals shown in Figure 15-

5 on page 68.

Table 15-3. Port A Pins Alternate Functions

Port Pin Alternate Function

PA1

ADC1/ SGND/ T1 (ADC Input Channel 1, Signal Ground or

Timer/Counter1 Clock Input)

PA0

ADC0/ SGND/ T0 (ADC Input Channel 0, Signal Ground or

Timer/Counter0 Clock Input))

Table 15-4. Overriding Signals for Alternate Functions in PA1..PA0

Signal Name PA0/ADC0/SGND/T0 PA1/ADC1/SGND/T1

PUOE 0 0

PUOV 0 0

DDOE 0 0

DDOV 0 0

PVOE 0 0

PVOV 0 0

PTOE – –

DIEOE PA0DID PA1DID

DIEOV 0 0

DI – –

AIO ADC0 INPUT/ SGND/ T0 ADC1 INPUT/ SGND/ T1