MC81F4316K 参数 Datasheet PDF下载

MC81F4x16

10.5 R4 Port Registers

R4CONH – R44~R47

R4 PORT CONTROL HIGH REGISTER

00DEH

A reset clears the R4CONH register to „AAH‟, makes the R47-R44 pins to open-drain output mode.

You can use R4CONH register setting to select input (with or without pull-up) or output mode (open-

drain or push-pull).

7

R4CONH

R/W

R47

6

R/W

5

R46

4

R/W

3

R45

2

R/W

1

R44

0

Reset value: AAH

R/W

R/W

R/W

R/W

00: Input mode

R47

R47

01: Input pull-up mode

10: Output mode, open-drain

11: Output mode, push-pull

00: Input mode

R46

R46

01: Input pull-up mode

10: Output mode, open-drain

11: Output mode, push-pull

00: Input mode

R45

R45

01: Input pull-up mode

10: Output mode, open-drain

11: Output mode, push-pull

00: Input mode

R44

R44

01: Input pull-up mode

10: Output mode, open-drain

11: Output mode, push-pull

October 19, 2009 Ver.1.35

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