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(b) Asynchronous serial interface status register 0 (ASIS0)
ASIS0 can be read by an 8-bit memory manipulation instruction.
RESET input sets the value of this register to 00H.
Address: FFA1H After reset: 00H
Symbol
7
ASIS0
0
PE0
0
1
FE0
0
1
OVE0
0
1
Notes 1. Even if a stop bit length is set to 2 bits by setting bit 2 (SL0) in asynchronous serial interface mode
register 0 (ASIM0), stop bit detection during a receive operation only applies to a stop bit length
of 1 bit.
2. Once an overrun error has occurred, further overrun errors will occur until the contents of RXB0
are read.
296
CHAPTER 16 SERIAL INTERFACE UART0
R
6
5
0
0
No parity error
Parity error
(Transmit data parity not matched)
No framing error
Note 1
Framing error
(Stop bit not detected)
No overrun error
Note 2
Overrun error
(Next receive operation was completed before data was read from receive buffer register
0 (RXB0))
User's Manual U15798EJ2V0UD
4
3
2
0
0
PE0
Parity error flag
Framing error flag
Overrun error flag
1
0
FE0
OVE0
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