M38B53M4-059FP datasheet(162/355 Pages) MITSUBISHI

162 / 355 page

2-74

38B5 Group User’s Manual

APPLICATION

2.3 Serial I/O

Fig. 2.3.52 Registers setting relevant to transmission side

Serial I/O2 status register (address 001E 16)

SIO2STS

Transmission side

Baud rate generator (address 0016 16)

BRG

0516

SIO2CON

10 0 1

0 1

UART control register (address 0017 16)

UARTCON

f(XIN)

Transfer bit rate ! 16 ! m

– 1

Serial I/O2 control register (address 001D 16)

Set

When bit 0 of SIO2CON (address 001D 16) is set to “0”,

a value of m is 1.

When bit 0 of SIO2CON is set to “1”, a value of m is 4.

BRG count source : f(XIN)/4

Serial I/O2 synchronous clock : BRG/16

Transmit enabled

Receive disabled

Asynchronous serial I/O (UART)

Serial I/O2 enabled

SRDY2

output disabled

Character length : 8 bits

Parity checking disabled

P55/TXD pin : CMOS output

Stop bit length : 2 stop bits

Transmit buffer empty flag

• Confirm that tha data has been transferred from Transmit buffer

• When this flag is “1”, it is possible to write the next transmission

data in to Transmit buffer register.

Transmit shift register shift completion flag

Confirm completion of transmitting 1-byte data with this flag.

“1” : Transmit shift completed

BRG clock : f(XIN)

Figure 2.3.52 shows the registers setting relevant to the transmission side; Figure 2.3.53 shows the

registers setting relevant to the reception side.

M38B53M4-059FP Datasheet(PDF) 162 Page - Mitsubishi Electric Semiconductor

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