UPD75048CW 查看數據表（PDF） - NEC => Renesas Technology

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UPD75048CW

4-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

P03/SI/SB1

P02/SO/SB0

P01/SCK

8/4 Bit

test

CSIM

P01

output

latch

Internal bus

8

Bit manipulation

8

8

Slave address register (8)

(SVA)

SBIC

Coincidence

Address comparator

signal

(8)

RELT

CMDT

SO latch

SET CLR

Shift register (SIO)

D

Q

(8)

Bit test

Bus release/

command/

acknowledge

detector

circuit

RELD

CMDD

ACKD

Serial clock

counter

INTCSI

control

circuit

Serial clock

control

circuit

Busy/

acknowledge

output

circuit

Serial clock

selector

INTCSI

( ) IRQCSI

set signal

fX/23

fX/24

fX/26

TOUT F/F

(from timer/

event counter)

External SCK

Fig. 6-6 Serial Interface Block Diagram

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