Technical information

2-27
3800 GROUP USER’S MANUAL
APPLICATION
2.3 Serial I/O
Timer X interrupt request
bit
Serial I/O receive interrupt
request bit
Interrupt request register 1
b7 b6 b5 b4 b3 b2 b1 b0
B
Function
At reset
RW
0
1
2
3
0
0
0
0
Interrupt request reigster 1 (IREQ1) [Address : 3C16]
Name
INT0 interrupt request bit
INT
1 interrupt request bit
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
Serial I/O transmit interrupt
request bit
✻
✻
✻
✻
Timer Y interrupt request bit
4
5
6
7
0
0
0
0
Timer 1 interrupt request bit
0 : No interrupt request
1 : Interrupt request
Timer 2 interrupt request bit
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
0 : No interrupt request
1 : Interrupt request
✻
✻
✻
✻
✻
“0” is set by software, but not “1.”
Timer X interrupt request bit
Fig. 2.3.8 Structure of Interrupt request register 1
Fig. 2.3.9 Structure of Interrupt control register 1
Timer Y interrupt enable bit
Interrupt control register 1
b7 b6 b5 b4 b3 b2 b1 b0
B
Function
At reset
RW
0
1
2
3
0
0
0
0
Interrupt control register 1 (ICON1) [Address : 3E16]
Name
INT0 interrupt enable bit
INT
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
4
5
6
7
0
0
0
0
Timer X interrupt enable bit
Timer 1 interrupt enable bit
0 : Interrupt disabled
1 : Interrupt enabled
Timer 2 interrupt enable bit
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
0 : Interrupt disabled
1 : Interrupt enabled
Serial I/O transmit interrupt
enable bit
Serial I/O receive interrupt
enable bit