M38004S7-XXXSS View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M38004S7-XXXSS

8-BIT SINGLE-CHIP MICROCOMPUTER

MITSUBISHI ELECTRIC  

APPLICATION

2.3 Serial I/O

(2) Output of serial data (control of a peripheral IC)

Outline : 4-byte data is transmitted and received through the clock synchronous serial I/O. The CS

signal is output to a peripheral IC through the port P53.

P53

SCLK

TXD

CS

CLK

DATA

CS

CLK

DATA

3800 group

Peripheral IC

Fig. 2.3.19 Connection diagram [Output of serial data]

Specifications : • The Serial I/O is used. (clock synchronous serial I/O is selected)

• Synchronous clock frequency : 125 kHz (f(XIN) = 4 MHz is divided by 32)

• Transfer direction : LSB first

• The Serial I/O1 interrupt is not used.

• The Port P53 is connected to the CS pin (“L” active) of the peripheral IC for a

transmission control (the output level of the port P53 is controlled by software).

Figre 2.3.20 shows an output timing chart of serial data.

CS

CLK

DATA

DO0

DO1

DO2

DO3

Fig. 2.3.20 Timing chart [Output of serial data]

2-36

3800 GROUP USER’S MANUAL

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