M38005S6DXXXFS View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M38005S6DXXXFS

8-BIT SINGLE-CHIP MICROCOMPUTER

MITSUBISHI ELECTRIC  

APPLICATION

2.3 Serial I/O

2.3.3 Serial I/O connection examples

(1) Control of peripheral IC equipped with CS pin

There are connection examples using a clock synchronous serial I/O mode.

Figure 2.3.10 shows connection examples of a peripheral IC equipped with the CS pin.

(1) Only transmission

(using the RXD pin as an I/O port)

Port

SCLK

TXD

CS

CLK

DATA

3800 group Peripheral IC

(OSD controller etc.)

(2) Transmission and reception

Port

SCLK

TXD

RXD

3800 group

CS

CLK

IN

OUT

Peripheral IC

(E2 PROM etc.)

(3) Transmission and reception

(Pins RXD and TXD are connected)

(Pins IN and OUT in peripheral IC

are connected)

Port

CS

SCLK

CLK

TXD

IN

RXD

OUT

3800 group T1 Peripheral ICT2

(E2 PROM etc.)

(4) Connecting ICs

Port

SCLK

TXD

RXD

Port

3800 group

CS

CLK

IN

OUT

Peripheral IC 1

T1: Select an N-channel open-drain output control of TXD pin.

2: Use such OUT pin of peripheral IC as an N-channel open-

drain output in high impedance during receiving data.

Note: “Port” is an output port controlled by software.

CS

CLK

IN

OUT

Peripheral IC 2

Fig. 2.3.10 Serial I/O connection examples (1)

2-28

3800 GROUP USER’S MANUAL

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