
7531 Group User’s Manual
2-16
APPLICATION
2.2 Timer
Fig. 2.2.9 Structure of Interrupt request register 1
Interrupt request register 1
b7 b6 b5 b4 b3 b2 b1 b0
B
Function
At reset
RW
0
1
2
3
4
5
6
7
Name
0
Interrupt request register 1 (IREQ1) [Address : 3C 16]
Nothing is allocated for this bit. This is a write disabled bit.
When this bit is read out, the value is “0”.
!
Serial I/O1 receive
interrupt request bit
Serial I/O1 transmit or INT 1
interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
Timer 2 or serial I/O2 interrupt
request bit
CNTR0 or AD converter
interrupt request bit
V: These bits can be cleared to “0” by program, but cannot be set to “1”.
0 : No interrupt request issued
1 : Interrupt request issued
INT0 interrupt request bit
Timer X or key-on wake up
interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
Timer 1 interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
V
Interrupt control register 1
b7 b6 b5 b4 b3 b2 b1 b0
B
Function
At reset
RW
0
1
2
3
4
5
6
7
Name
0
Interrupt control register 1 (ICON1) [Address : 3E 16]
Nothing is allocated for this bit. Do not write “1” to this bit.
When this bit is read out, the value is “0”.
!
Serial I/O1 receive
interrupt enable bit
Serial I/O1 transmit or INT 1
interrupt enable bit
0 : Interrupt disabled
1 : Interrupt enabled
Timer 2 or serial I/O2 interrupt
enable bit
CNTR0 or AD converter
interrupt enable bit
INT0 interrupt enable bit
Timer X or key-on wake up
interrupt enable bit
Timer 1 interrupt enable bit
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
Fig. 2.2.10 Structure of Interrupt control register 1