M38749M Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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M38749M

Single-chip 8-bit CMOS microcomputer. ROM 61440 bytes, RAM 2048 bytes. Mask ROM version.

MITSUBISHI ELECTRIC  

MITSUBISHI MICROCOMPUTERS

3874 Group

Pull-up Control

P20–P26, TXD, SCLK1, SOUT2, and SCLK2 can perform pull-up con-

trol by setting “1” to the pull-up register (address 003316).

P20–P27’s pull-up is valid in the input mode, and TXD, SCLK1,

SOUT2, and SCLK2s’ pull-up is valid in the output mode.

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

b7

b0

Pull-up register

(PULLU : address 0033 16)

P26, P27 pull-up

P25 pull-up

P22–P24 pull-up

P20, P21 pull-up

TXD, SCLK1 pull-up

SOUT2, SCLK2 pull-up

Not used (returns “0” when read)

(Do not write “1” to these bits.)

0: No pull-up

1: Pull-up

Fig.11 Structure of Pull-up Register

16

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