Renesas M32R/ECU Series User Manual page 500

12
SIO23 Interrupt Request Status Register (SI23STAT)
b0 1 2
0 0 0
b Bit Name
0–3 No function assigned. Fix to "0".
4 IRQT2
SIO2 transmit interrupt request status bit
5 IRQR2
SIO2 receive interrupt request status bit
6 IRQT3
SIO3 transmit interrupt request status bit
7 IRQR3
SIO3 receive interrupt request status bit
Note 1: Only writing "0" is effective. Writing "1" has no effect; the bit retains the value it had before the write.
SIO45 Interrupt Request Status Register (SI45STAT)
b0 1 2
IRQT4 IRQR4 IRQT5 IRQR5
0 0 0
b Bit Name
0 IRQT4
SIO4 transmit interrupt request status bit
1 IRQR4
SIO4 receive interrupt request status bit
2 IRQT5
SIO5 transmit interrupt request status bit
3 IRQR5
SIO5 receive interrupt request status bit
4–7 No function assigned. Fix to "0".
Note 1: Only writing "0" is effective. Writing "1" has no effect; the bit retains the value it had before the write.
These registers indicate the transmit/receive interrupt requests from each SIO.
[Setting the interrupt request status bit]
This bit can only be set in hardware, and cannot be set in software.
[Clearing the interrupt request status bit]
This bit is cleared by writing "0" in software.
Note: • If the status bit is set in hardware at the same time it is cleared in software, the former has
priority and the status bit is set.
When writing to the SIO Interrupt Request Status Register, make sure only the bits to be cleared are set to "0"
and all other bits are set to "1". Those bits that have been set to "1" are unaffected by writing in software and
retain the value they had before the write.
3 4 5 6
IRQT2 IRQR2 IRQT3 IRQR3
0 0 0 0
3 4 5 6
0 0 0 0
12.2 Serial I/O Related Registers
b7
0
Function
0: Interrupt not requested
1: Interrupt requested
0: Interrupt not requested
1: Interrupt requested
0: Interrupt not requested
1: Interrupt requested
0: Interrupt not requested
1: Interrupt requested
b7
0
Function
0: Interrupt not requested
1: Interrupt requested
0: Interrupt not requested
1: Interrupt requested
0: Interrupt not requested
1: Interrupt requested
0: Interrupt not requested
1: Interrupt requested
12-9
Serial I/O
<Address: H'0080 0100>
<After reset: H'00>
R
0
R (Note 1)
R (Note 1)
R (Note 1)
R (Note 1)
<Address: H'0080 0A00>
<After reset: H'00>
R
R (Note 1)
R (Note 1)
R (Note 1)
R (Note 1)
0
32180 Group User's Manual (Rev.1.0)
W
0
W
0