ATMEGA649 Datasheet, PDF (79/375 Pages) ATMEL Corporation – 8-bit Microcontroller with In-System Programmable Flash

ATmega329/3210/649/6410
Table 44. Overriding Signals for Alternate Functions in PF3:PF0
Signal
Name
PF3/ADC3
PF2/ADC2
PF1/ADC1
PUOE
0
0
0
PUOV
0
0
0
DDOE
0
0
0
DDOV
0
0
0
PVOE
0
0
0
PVOV
0
0
0
PTOE
–
–
–
DIEOE
0
0
0
DIEOV
0
0
0
DI
–
–
–
AIO
ADC3 INPUT
ADC2 INPUT
ADC1 INPUT
PF0/ADC0
0
0
0
0
0
0
–
0
0
–
ADC0 INPUT
Alternate Functions of Port G The alternate pin configuration is as follows:
Table 45. Port G Pins Alternate Functions (SEG refers to 100-pin/64-pin pinout)
Port Pin
PG5
Alternate Function
RESET⁽¹⁾
PG4
T0/SEG (Timer/Counter0 Clock Input or LCD Front Plane 32/23)
PG3
T1/SEG (Timer/Counter1 Clock Input or LCD Front Plane 33/24)
PG2
SEG (LCD Front Plane 4/4)
PG1
SEG (LCD Front Plane 17/13)
PG0
SEG (LCD Front Plane 18/14)
Note: 1. Port G, PG5 is input only. Pull-up is always on.
See Table 125 on page 282 for RSTDISBL fuse.
The alternate pin configuration is as follows:
• RESET – Port G, Bit 5
RESET: External Reset input. When the RSTDISBL Fuse is programmed (‘0’), PG5 will
function as input with pull-up always on.
• T0/SEG – Port G, Bit 4
T0, Timer/Counter0 Counter Source.
SEG, LCD front plane 32/23.
• T1/SEG24 – Port G, Bit 3
T1, Timer/Counter1 Counter Source.
SEG, LCD front plane 33/24.
• SEG – Port G, Bit 2
SEG, LCD front plane 4/4.
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