M38005M2DXXXFP View Datasheet(PDF) - MITSUBISHI ELECTRIC

Part Name

Description

Manufacturer

M38005M2DXXXFP

8-BIT SINGLE-CHIP MICROCOMPUTER

MITSUBISHI ELECTRIC  

APPLICATION

2.3 Serial I/O

Transmitting side

Serial I/O status register (Address : 1916)

b7

b0

SIOSTS

Transmit buffer empty flag

• Check to be transferred data from the Transmit buffer register to

Transmit shift register.

• Writable the next transmission data to the Transmit buffer register

at being set to “1.”

Transmit shift register shift completion flag

Check a completion of transmitting 1-byte data with this flag

“1” : Transmit shift completed

Serial I/O control register (Address : 1A16)

b7

b0

SIOCON 1 1 0 1

00

BRG counter source selection bit : f(XIN)

Serial I/O synchronous clock selection bit : BRG/4

Transmit enable bit : Transmit enabled

Receive enable bit : Receive disabled

Serial I/O mode selection bit : Clock synchronous serial I/O

Serial I/O enable bit : Serial I/O enabled

Baud rate generator (Address : 1C16)

b7

b0

BRG

7

Set “division ratio – 1”

Interrupt edge selection register (Address : 3A16)

b7

b0

INTEDGE

0

INT0 active edge selection bit : Select INT0 falling edge

Fig. 2.3.15 Setting of related registers at a transmitting side [Communication using a clock

synchronous serial I/O]

2-32

3800 GROUP USER’S MANUAL

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