TMP86FS49AFG Toshiba Semiconductor, TMP86FS49AFG Datasheet - Page 177

• Manufacturer Part Number: TMP86FS49AFG
• Description: 8-Bit Microcontroller
• Manufacturer: Toshiba Semiconductor

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Serial Interface Status Register
Receive buffer register
Transmit buffer register
SIO1RDB
SIO1TDB
SIO1SR
(0021H)
(0022H)
(0022H)
Note 1: The operation error flag (TXERR and RXERR) are not automatically cleared by stopping transfer with SIO1CR<SIOS>
Note 2: *: Don't care
Note 1: SIO1TDB is write only register. A bit manipulation should not be performed on the transmit buffer register using a read-
Note 2: The SIO1TDB should be written after checking SIO1SR<TXF> "1". When SIO1SR<TXF> is "0", the writing data can't be
Note 3: *: Don't care
"0". Therefore, set these bits to "0" for clearing these error flag. Or set SIO1CR<SIOINH> to "1".
modify-write instruction.
transferred to SIO1TDB even if write instruction is executed to SIO1TDB
SIOF
RXERR
TXERR
SIOF
RXF
7
SEF
TXF
7
7
SEF
6
Serial transfer operation status
monitor
Number of clocks monitor
Transmit buffer empty flag
Receive buffer full flag
Transfer operation error flag
Receive operation error flag
6
6
TXF
5
5
5
RXF
4
4
4
TXERR
3
0: Transfer finished
1: Transfer in progress
0: 8 clocks
1: 1 to 7 clocks
0: Data exists in transmit buffer
1: No data exists in transmit buffer
0: No data exists in receive buffer
1: Data exists in receive buffer
Read
0: – (No error exist)
1: Transmit buffer under run occurs in an external clock mode
Write
0: Clear the flag
1: – (A write of "1" to this bit is ignored)
Read
0: – (No error exist)
1: Receive buffer over run occurs in an external clock mode
Write
0: Clear the flag
1: – (A write of "1" to this bit is ignored)
3
3
Page 161
RXERR
2
2
2
1
1
1
0
0
0
(Initial value: 0010 00**)
Read only
(Initial value: 0000 0000)
Write only
(Initial value: **** ****)
TMP86FS49AFG
Read
R/W
only