M38B53M4-059FP datasheet(130/355 Pages) MITSUBISHI

130 / 355 page

2-42

38B5 Group User’s Manual

APPLICATION

2.3 Serial I/O

Fig. 2.3.9 Structure of Serial I/O2 control register

Serial I/O2 control register

b7 b6 b5 b4 b3 b2 b1 b0

Serial I/O2 control register

(SIO2CON: address 1D16)

Name

Functions

At reset R W

0: Transmit disabled

1: Transmit enabled

Receive enable bit

(RE)

0: Clock asynchronous

serial I/O (UART) mode

1: Clock synchronous

serial I/O mode

0: Serial I/O2 disabled

(pins P54–P57 operate

as normal I/O pins)

1: Serial I/O2 enabled

(pins P54–P57 operate

as serial I/O pins)

0: When transmit buffer

has emptied

1: When transmit shift

operation is completed

BRG count source

selection bit (CSS)

Serial I/O2

synchronous clock

selection bit

(SCS)

Serial I/O2 mode

selection bit (SIOM)

Serial I/O2 enable

bit (SIOE)

Transmit interrupt

source selection bit

(TIC)

0: f(XIN) or f(XCIN)/2 or

f(XCIN)

1: f(XIN)/4 or f(XCIN)/8 or

f(XCIN)/4

•In clock synchronous

mode

0: BRG output/4

1: External clock input

•In UART mode

0: BRG output/16

1: External clock input/16

Transmit enable bit

(TE)

0: Receive disabled

1: Receive enabled

SRDY2 output

enable bit (SRDY)

0: P57 pin operates as

normal I/O pin

1: P57 pin operates as

SRDY2 output pin

M38B53M4-059FP Datasheet(PDF) 130 Page - Mitsubishi Electric Semiconductor

M38B53M4-059FP Datasheet(HTML) 130 Page - Mitsubishi Electric Semiconductor

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