NEC UPD789026 Series User Manual page 126

(2) Asynchronous serial interface mode register 00 (ASIM00)
This register is set when using serial interface 00 in the asynchronous serial interface mode.
ASIM00 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears ASIM00 to 00H.
Symbol <7>
ASIM00 TXE00
TXE00
0 Transmit operation stop
1 Transmit operation enable
RXE00
0
Receive operation stop
1 Receive operation enable
PS001
0
0
1
1
CL00
0 7 bits
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1
8 bits
SL00
0 1 bit
1 2 bits
Cautions 1. Be sure to set bits 0 and 1 to 0.
126
CHAPTER 9 SERIAL INTERFACE 00
Figure 9-4. Asynchronous Serial Interface Mode Register 00 Format
<6> 5 4
RXE00 PS001 PS000
PS000
0 No parity
Always add 0 parity at transmission
1
Parity check is not performed at reception (No parity error is generated)
0 Odd parity
1
Even parity
Transmit Data Stop Bit Length Specification
2. Set 00H to ASIM00 at the 3-wire serial I/O mode.
3. Switching operating modes must be performed after the halt of serial transmit/receive
operation.
User's Manual U11919EJ3V0UM00
3 2 1
CL00 SL00 0
Transmit Operation Control
Receive Operation Control
Parity Bit Specification
Character Length Specification
0 Address After Reset
0 FF70H 00H
R/W
R/W