M38B53M4-059FP datasheet(154/355 Pages) MITSUBISHI

154 / 355 page

2-66

38B5 Group User’s Manual

APPLICATION

2.3 Serial I/O

Figure 2.3.43 shows a control procedure.

SIO2CON (address 001D16)

UARTCON (address 001716)

BRG (address 00161)

ICON2 (address 003F16), bit4

P5 (address 000A16), bit7

P5D (address 000B16), bit7

110110002

X000XXXX2

8 – 1

P5 (address 000A16), bit7

IREQ2 (address 003D16), bit4 ?

RESET

TB/RB (address 001F16)

IREQ2 (address 003D16), bit4

P5 (address000A16), bit7

Initialization

Transmission data

All data has been transmitted ?

q X: This bit is not used here. Set it to “0” or “1” arbitrarily.

Judgment of completion of transmitting 1-byte

data

Use any of RAM area as a counter for counting

the number of transmitted bytes.

Judgment of completion of transmitting the target

number of bytes

Returning CS signal output level to “H” when

transmission of the target number of bytes is

completed

Serial I/O2 setting

INT3/Serial I/O2 transmit interrupt: Disabled

CS signal output level to “H” setting

CS signal output port setting

CS signal output level to “L” setting

Transmission data write

(Start of 1-byte data transmission)

INT3/Serial I/O2 transmit interrupt request bit to “0” setting

Fig. 2.3.43 Control procedure

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