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(b) Asynchronous serial interface mode register 20 (ASIM20)
ASIM20 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears ASIM20 to 00H.
Symbol
<7>
<6>
ASIM20
TXE20 RXE20 PS201 PS200 CL20 SL20
TXE20
0
Transmit operation stop
Transmit operation enable
1
RXE20
0
Receive operation stop
1
Receive operation enable
PS201
PS200
0
0
No parity
0
1
Always add 0 parity at transmission.
Parity check is not performed at reception (No parity error is generated).
Odd parity
1
0
1
1
Even parity
CL20
0
7 bits
1
8 bits
SL20
0
1 bit
1
2 bits
Cautions 1. Be sure to set bits 0 and 1 to 0.
2. Switch operating modes after halting the serial transmit/receive operation.
178
CHAPTER 13 SERIAL INTERFACE 20
5
4
3
2
1
0
Character length specification
Transmit data stop bit length specification
User's Manual U13045EJ2V0UM00
0
Address
After reset
0
FF70H
00H
Transmit operation control
Receive operation control
Parity bit specification
R/W
R/W
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