Rainbow-electronics Atmega169L Manuel d'utilisateur télécharger pdf (Page 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

PUOE0000

PUOV0000

DDOE 0 0 0 0

DDOV 0 0 0 0

PVOE0000

PVOV0000

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)

1 2 ... 64 65 66 67 68 69 70 71 72 73 74 ... 316 317

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Rainbow-electronics Atmega169L Manuel d'utilisateur Page 69