R8A66171DD/SP

REJ03F269-0100 Rev.1.00 Feb.19.2008

Page 10 of 22

COMMAND-INSTRUCTION FORMAT

The commands are decoded by D7 and D6.

Note 1 : Priority is given to parity enable, if parity enable and CRC enable are both "1" (D3, D2=1).

Note 2 : TxD output wave is Stop bit (D5) setup value +1 (always).

D7

0

D6

0

D5

D4

D3

D2

D1

D0

ST

EP

PEN

CRCEN

BAUD

PS

Command1

1 : 1/32 division

0 : 1/2 division

1 : 2 bits

0 : 1 bit

1 : Even parity

0 : Odd parity

1 : Enable

0 : Disable

1 : To command2

（Baud rate setting）

Prescaler

Baud rate setting

CRC enable

Parity enable

Parity check

Stop bit

Note2

1 : Enable

0 : Disable

Command2 (Baud rate setting. The second byte when D1 bit of the command1 is set to "1".）

D7

D6

D5

D4

D3

D2

D1

D0

0

0

0

0

0

0

0

0

0

~

~

~

~

~

~

~

~

~

1

1

1

1

1

1

1

1

255

n

Command3 （Block length setting）

0

1

D5

D4

D3

D2

D1

D0

0

0

0

0

0

0

0

~

~

~

~

~

~

~

1

1

1

1

1

1

63

m

D7

D6