UPD750108CU データシートの表示（PDF） - NEC => Renesas Technology

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UPD750108CU

4 BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

P03/SI/SB1

P02/SO/SB0

P01/SCK

8/4 Bit

test

CSIM

Selec-

tor

Figure 6-8. Serial Interface Block Diagram

Internal bus

8

8

8

Bit manipulation

Slave address register (SVA) (8)

SBIC

Address comparator

Coincidence

signal

RELT

(8)

CMDT

Shift register (SIO)

SET CLR SO latch

D

Q

(8)

Bit test

Selec-

tor

P01

output latch

Bus release/

command/

acknowledge

detection circuit

RELD

CMDD

ACKD

Busy/

acknowledge

output circuit

Serial clock

counter

INTCSI

control circuit

Serial clock

control circuit

Serial clock

selector

INTCSI

IRQCSI

set signal

fCC/23

fCC/24

fCC/26

TOUT0

(from timer/event counter)

External SCK

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