M38B53M4-059FP datasheet(150/355 Pages) MITSUBISHI

150 / 355 page

2-62

38B5 Group User’s Manual

APPLICATION

2.3 Serial I/O

Figure 2.3.37 shows a control procedure of the transmission side, and Figure 2.3.38 shows a control

procedure of the reception side.

Fig. 2.3.37 Control procedure of transmission side

SIO2CON (address 001D16)

UARTCON (address 001716)

BRG (address 001616)

INTEDGE (address 003A16), bit0

1101X0002

X000XXXX2

8 – 1

SIO2STS (address 001E16), bit0 ?

RESET

IREQ1 (address 003C16), bit0 ?

IREQ1 (address 003C16), bit0

TB/RB (address 001F16)

SIO2STS (address 001E16), bit0 ?

TB/RB (address 001F16)

Initialization

The first byte of a

transmission data

The second byte of

a transmission data

SIO2STS (address 001E16), bit2 ?

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

• Serial I/O2 setting

• Detection of INT0 falling edge

• Transmission data write

Transmit buffer empty flag is set to “0” by this writing.

• Judgment of transferring from Transmit buffer

(Transmit buffer empty flag)

• Transmission data write

Transmit buffer empty flag is set to “0” by this writing.

• Judgment of transferring from Transmit buffer

(Transmit buffer empty flag)

• Judgment of shift completion of Transmit shift register

(Transmit shift register shift completion flag)

M38B53M4-059FP Datasheet(PDF) 150 Page - Mitsubishi Electric Semiconductor