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2467S–AVR–07/09

ATmega128

Port F Data Direction

Port F Input Pins

Address – PINF

Note that PORTF and DDRF Registers are not available in ATmega103 compatibility mode

where Port F serves as digital input only.

Port G Data Register –

PORTG

Port G Data Direction

Port G Input Pins

Address – PING

Note that PORTG, DDRG, and PING are not available in ATmega103 compatibility mode. In the

ATmega103 compatibility mode Port G serves its alternate functions only (TOSC1, TOSC2, WR

and ALE).

Bit 76543210

DDF7 DDF6 DDF5 DDF4 DDF3 DDF2 DDF1 DDF0 DDRF

Read/Write R/W R/W R/W R/W R/W R/W R/W R/W

Initial Value00000000

Bit 76543210

PINF7 PINF6 PINF5 PINF4 PINF3 PINF2 PINF1 PINF0 PINF

Read/WriteRRRRRRRR

Initial Value N/A N/A N/A N/A N/A N/A N/A N/A

Bit 76543210

–––

PORTG4 PORTG3 PORTG2 PORTG1 PORTG0 PORTG

Read/Write R R R R/W R/W R/W R/W R/W

Initial Value00000000

Bit 76543210

– – – DDG4 DDG3 DDG2 DDG1 DDG0 DDRG

Read/Write R R R R/W R/W R/W R/W R/W

Initial Value00000000

Bit 76543210

– – – PING4 PING3 PING2 PING1 PING0 PING

Read/WriteRRRRRRRR

Initial Value 0 0 0 N/A N/A N/A N/A N/A

Atmel ATmega128 User Manual

Questions and Answers: