M38B53M4-059FP datasheet(139/355 Pages) MITSUBISHI

139 / 355 page

38B5 Group User’s Manual

APPLICATION

2-51

2.3 Serial I/O

Figure 2.3.22 shows the registers setting relevant to the transmission side, and Figure 2.3.23 shows

the setting of transmission data.

Fig. 2.3.23 Setting of transmission data

Fig. 2.3.22 Registers setting relevant to transmission side

P6D

Port P6 direction register (address 000D16)

Set P62 to output mode

Port P6 (address 000C16)

Set P62 output level to “H”

SIO1CON1

(SC11)

Serial I/O1 control register 1 (address 001916)

0 0 1 0 0 0 0 1

Serial I/O initialization

Transmit-only mode

Serial I/O1 clock pin: SCLK11

LSB first

8-bit serial I/O

SIO1CON2

(SC12)

0 0

0 0 0 0

P51/SOUT1: CMOS 3-state (P-channel output is valid.)

SOUT1 pin: Output active

Pins P62 and P64 of I/O ports

SIO1CON3

(SC13)

0 1

Internal synchronous clock: f(XIN)/32

Internal synchronous clock (P65 pin is an I/O port.)

Serial I/O1 control register 2 (address 001A16)

Serial I/O1 control register 3 (address 001C16)

SIO1

Serial I/O1 register (001B16)

Set a transmission data.

Confirm that transmission of the previous

data is completed, where bit 5, the serial

transfer status flag of the serial I/O1 control

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