7641 데이터 시트보기 (PDF) - Mitsumi

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7641

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Mitsumi 

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MITSUBISHI MICROCOMPUTERS

7641 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

(13) Port P71

HOLD function enable bit

Direction

register

Data bus

Port latch

HOLD

HOLD function

enable bit

(14) Port P72

Data bus buffer function select bit

Direction

register

Data bus

Port latch

Data bus buffer

function select bit

S1

(15) Port P73

IBF1 output enable bit

Data bus buffer function

select bit HOLD function

enable bit

Direction

register

Data bus

Port latch

(16) Port P74

OBF1 output enable bit

Data bus buffer function select bit

Direction

register

Data bus

Port latch

OBF1 output

IBF1 output

(17) Port P80

SRDY output select bit

(UART2) Transmit enable bit

HLDA

Data bus

Direction

register

Port latch

SPI mode select bit

(18) Port P81

(Serial I/O) Internal synchronous clock select bits

Serial I/O port select bit

(UART2) Receive enable bit

Direction

register

Data bus

Port latch

(UART2) Receive enable bit

(Serial I/O) Internal

synchronous clock

select bits

SRDY output

(UART2) UTXD2 output

SPI mode select bit

Control for SPI

compatible mode

Serial I/O clock output

(UART2) Receive enable bit

(UART2) URXD2 input

Serial I/O clock input

Fig. 14 Port block diagram (3)

18

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