M32C83T datasheet(314/527 Pages) RENESAS

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Page 291

21. Intelligent I/O (Group 0, 1 Communication Function)

)

(

Function

Group i SI/O Receive Buffer Register (i=0,1)

Bit Name

Bit

Symbol

Address

After Reset

G0RB, G1RB

00E916-00E816, 012916-012816

XX00 XXXX XXXX XXX2

FER

Received data

OER

(b11 - b8)

(b7 - b0)

(b15 - b14)

0 : No overrun error

1 : Overrun error found

Nothing is assigned.

When read, its content is indeterminate.

Nothing is assigned.

When read, its content is indeterminate.

Framing Error Flag

0 : No framing error

1 : Framing error found

Overrun Error Flag

b15

Group i SI/O Communication Mode Register (i=0,1)

Symbol

Address

After Reset

G0MR,G1MR

00ED16, 012D16

0016

Bit Name

Function

Bit

Symbol

NOTES:

1. Do not set except when using in motor vehicles

GMD0

GMD1

CKDIR

Communication Mode

Select Bit

STPS

UFORM

(b5 - b4)

IRS

Internal/External Clock

Select Bit

Stop Bit Length

Select Bit

Transfer Direction

Select Bit

Transmit Interrupt

Cause Select Bit

0 : Internal clock

1 : External clock

0 : 1 stop bit

1 : 2 stop bits

0 : LSB first

1 : MSB first

0 : No data in the transmit

buffer (TI=1)

1 : Transmission is completed

(TXEPT=1)

: UART mode

: Clock synchronous serial I/O

mode

: Special communication mode(1)

: HDLC data processing mode

Reserved Bit

Set to "0"

Figure 21.34 G0RB to G1RB Registers and G0MR to G1MR Registers

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