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 and Table 27 relate the alternate functions of Port C to the overriding signals shown in
Figure 25 on page 56.
Table 26. Overriding Signals for Alternate Functions in PC6..PC4
Signal Name PC6/RESET
PC5/SCL/ADC5
PC4/SDA/ADC4
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
RSTDISBL
TWEN
TWEN
1
PORTC5 • PUD
PORTC4 • PUD
RSTDISBL
TWEN
TWEN
0
SCL_OUT
SDA_OUT
0
TWEN
TWEN
0
0
0
RSTDISBL
0
0
0
0
0
–
–
–
AIO
RESET INPUT
ADC5 INPUT / SCL INPUT
ADC4 INPUT / SDA INPUT
Table 27. Overriding Signals for Alternate Functions in PC3..PC0(1)
Signal Name
PUOE
PUOV
DDOE
DDOV
PVOE
PVOV
DIEOE
DIEOV
DI
PC3/ADC3
PC2/ADC2
PC1/ADC1
PC0/ADC0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
–
–
–
–
AIO
ADC3 INPUT
ADC2 INPUT
ADC1 INPUT
ADC0 INPUT
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
62
2486AA–AVR–02/2013
ATMEL [ ATMEL ]
