UPD178002 datasheet(19/48 Pages) NEC

Part #	UPD178002

Description	8-BIT SINGLE-CHIP MICROCONTROLLERS

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Manufacturer	NEC [NEC]

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19

µPD178002, 178003

Data Sheet U12628EJ3V0DS00

5.6 Serial Interfaces

One clocked serial interface channel is incorporated.

Serial interface channel 1 operates in the 3-wire serial I/O mode where MSB/LSB first can be switched.

Figure 5-6. Block Diagram of Serial Interface Channel 1

Internal bus

Interrupt request

signal generator

Serial clock control circuit

Selector

Serial clock counter

Serial I/O shift register 1 (SIO1)

INTCSI1

fXX/2 to fXX/2

8

SI1/P20

SO1/P21

SCK1/P22

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