2-48
3886 Group User’s Manual
APPLICATION
2.4 Serial I/O
Fig. 2.4.11 Structure of Interrupt request register 1
Fig. 2.4.12 Structure of Interrupt request register 2
Interrupt request register 1
b7b6b5b4b3b2b1b0
B
Function
At reset
RW
0
1
2
3
4
5
6
7
Name
0
Interrupt request register 1 (IREQ1) [Address : 3C16]
INT0/input buffer full interrupt
request bit
INT1/output buffer empty
interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
Timer Y interrupt request bit
Timer 1 interrupt request bit
: These bits can be cleared to “0” by program, but cannot be set to “1”.
0 : No interrupt request issued
1 : Interrupt request issued
Serial I/O1 receive interrupt
request bit
Serial I/O1 transmit/SCL, SDA
interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
Timer X 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
Timer 2 interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
Interrupt request register 2
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 2 (IREQ2) [Address : 3D16]
Nothing is allocated for this bit. This is a write disabled bit.
When this bit is read out, the value is “0”.
CNTR0/SCL, SDA interrupt
request bit
CNTR1/key-on wake-up
interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
INT4 interrupt request bit
AD converter/key-on wake-up
interrupt request bit
: These bits can be cleared to “0” by program, but cannot be set to “1”.
0 : No interrupt request issued
1 : Interrupt request issued
Serial I/O2/I2C interrupt
request bit
INT2/I2C interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
INT3 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