ATMEGA128A-MU 查看數據表（PDF） - Atmel Corporation

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ATMEGA128A-MU

8-Bit AVR Microcontroller with 128K Bytes In-System Programmable Flash

Atmel Corporation 

ATmega128A

5. Register Summary (Continued)

Address

Name

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Page

$02 ($22)

DDRE

DDE7

DDE6

DDE5

DDE4

DDE3

DDE2

DDE1

DDE0

88

$01 ($21)

PINE

PINE7

PINE6

PINE5

PINE4

PINE3

PINE2

PINE1

PINE0

88

$00 ($20)

PINF

PINF7

PINF6

PINF5

PINF4

PINF3

PINF2

PINF1

PINF0

89

Notes: 1. For compatibility with future devices, reserved bits should be written to zero if accessed. Reserved I/O memory addresses

should never be written.

2. Some of the status flags are cleared by writing a logical one to them. Note that the CBI and SBI instructions will operate on

all bits in the I/O register, writing a one back into any flag read as set, thus clearing the flag. The CBI and SBI instructions

work with registers $00 to $1F only.

19

8151GS–AVR–07/10

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