D78054 Просмотр технического описания (PDF) - NEC => Renesas Technology

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D78054

8-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD78001B(A), 78002B(A)

5.6 SERIAL INTERFACES

There is one on-chip clocked serial interface.

Serial Interface channel 0 has the following three modes.

• 3-wire serial I/O mode

• SBI (Serial Bus Interface) mode

• 2-wire serial I/O mode

: MSB/LSB-first switchable

: MSB-first

: MSB-first

Fig. 5-7 Serial Interface Channel 0 Block Diagram

Internal Bus

SI0/SB0/P25

SO0/SB1/P26

SCK0/P27

Selector

Selector

Serial I/O Shift

Register 0 (SIO0)

Output

Latch

Bus Release/Command/

Acknowledge Detection

Circuit

Serial Counter

Busy/Acknowledge

Output Circuit

Interrupt

Request

Signal

Generator

INTCSI0

Serial Clock

Control Circuit

Selector

fX/22 – fX/29

TO2

21

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