Rainbow Electronics Atmega169L - Manual (Page 69)

69
ATmega169V/L
2514A–AVR–08/02
Alternate Functions of Port G The alternate pin configuration is as follows:
The alternate pin configuration is as follows:
• RESET – Port G, Bit 5
RESET, Reset pin: When the RSTDISBL Fuse is programmed, this pin functions as a
input only I/O pin, and the part will have to rely on Power-on Reset and Brown-out Reset
as its reset sources. When the RSTDISBL Fuse is unprogrammed, the reset circuitry is
connected to the pin, and the pin can not be used as an input I/O pin.
If PG5 is used as a Reset pin, then PING5 will read 0.
• T0/SEG23 – Port G, Bit 4
T0, Timer/Counter0 Counter Source.
SEG23, LCD front plane 23
• T1/SEG24 – Port G, Bit 3
T1, Timer/Counter1 Counter Source.
SEG24, LCD front plane 24
Table 43. Overriding Signals for Alternate Functions in PF3..PF0
Signal
Name
PF3/ADC3 PF2/ADC2 PF1/ADC1 PF0/ADC0
PUOE 0 0 0 0
PUOV 0 0 0 0
DDOE 0 0 0 0
DDOV 0 0 0 0
PVOE 0 0 0 0
PVOV 0 0 0 0
PTOE – – – –
DIEOE 0 0 0 0
DIEOV 0 0 0 0
DI – – – –
AIO ADC3 INPUT ADC2 INPUT ADC1 INPUT ADC0 INPUT
Table 44. Port G Pins Alternate Functions
Port Pin Alternate Function
PG5 RESET (Reset pin)
PG4 T0/SEG23 (Timer/Counter0 Clock Input or LCD Front Plane 23)
PG3 T1/SEG24 (Timer/Counter1 Clock Input or LCD Front Plane 24)
PG2 SEG4 (LCD Front Plane 4)
PG1 SEG13 (LCD Front Plane 13)
PG0 SEG14 (LCD Front Plane 14)