ATMEGA649 datasheet(79/375 Pages) ATMEL

79 / 375 page

ATmega329/3210/649/6410

2552H–AVR–11/06

Alternate Functions of Port G

The alternate pin configuration is as follows:

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.

Table 44. Overriding Signals for Alternate Functions in PF3:PF0

Signal

Name

PF3/ADC3

PF2/ADC2

PF1/ADC1

PF0/ADC0

PUOE

000

PUOV

000

DDOE

DDOV

PVOE

000

PVOV

000

PTOE

–––

–

DIEOE

000

DIEOV

000

–––

–

AIO

ADC3 INPUT

ADC2 INPUT

ADC1 INPUT

ADC0 INPUT

Table 45. Port G Pins Alternate Functions (SEG refers to 100-pin/64-pin pinout)

Port Pin

Alternate Function

PG5

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)

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