Datasheet

60
ATmega8A [DATASHEET]
8159E–AVR–02/2013
• 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 13-6 and Table 13-7 relate the alternate functions of Port C to the overriding signals shown in Figure 13-5 on
page 54.
Note: 1. When enabled, the Two-wire Serial Interface enables slew-rate controls on the output pins 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 13-6. Overriding Signals for Alternate Functions in PC6:PC4
Signal Name PC6/RESET PC5/SCL/ADC5 PC4/SDA/ADC4
PUOE RSTDISBL
TWEN TWEN
PUOV 1 PORTC5 • PUD
PORTC4 • PUD
DDOE RSTDISBL TWEN TWEN
DDOV 0 SCL_OUT SDA_OUT
PVOE 0 TWEN TWEN
PVOV 0 0 0
DIEOE RSTDISBL
00
DIEOV 0 0 0
DI – – –
AIO RESET INPUT ADC5 INPUT / SCL INPUT ADC4 INPUT / SDA INPUT
Table 13-7. Overriding Signals for Alternate Functions in PC3:PC0
(1)
Signal Name PC3/ADC3 PC2/ADC2 PC1/ADC1 PC0/ADC0
PUOE0000
PUOV0000
DDOE 0 0 0 0
DDOV 0 0 0 0
PVOE0000
PVOV0000
DIEOE0000
DIEOV0000
DI––––
AIO ADC3 INPUT ADC2 INPUT ADC1 INPUT ADC0 INPUT