NEC mPD789026 Subseries User Manual page 136

(c) Asynchronous serial interface status register 00 (ASIS00)
ASIS00 is set with a 1-bit or 8-bit memory manipulation instruction.
RESET input clears ASIS00 to 00H.
Symbol 7 6
ASIS00 0 0
PE00
0 Parity error not generated
1 Parity error generated (when the parity of transmit data does not coincide.)
FE00
0
Framing error not generated
1
Framing error generated (when stop bit is not detected.)
OVE00
Overrun error not generated
0
1 Overrun error generated
(when the next receive operation is completed before the data is read from the receive buffer register.)
Notes 1. Even when the stop bit length is set to 2 bits by setting bit 2 (SL00) of asynchronous serial
interface mode register 00 (ASIM00), the stop bit detection in the case of reception is
performed with 1 bit.
2. Be sure to read reception buffer register 00 (RXB00) when an overrun error occurs. If not,
every time the data is received an overrun error is generated.
136
CHAPTER 9 SERIAL INTERFACE 00
5 4 3
0 0 0
PE00
Note 2
User's Manual U11919EJ3V0UM00
1 0 Address
2
FE00 OVE00 FF71H
Parity Error Flag
Flaming Error Flag
Note 1
Overrun Error Flag
After Reset R/W
00H R