PD17225_15 Datasheet, PDF (45/86 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLER FOR SMALL GENERAL-PURPOSE INFRARED REMOTE CONTROL TRANSMITTER

µPD17225, 17226, 17227, 17228
7.2.4 IRQ
This is an interrupt request flag that indicates the interrupt request status.
When an interrupt request is generated, this flag is set to “1”. When the interrupt has been accepted, the interrupt
request flag is reset to “0”.
The interrupt request flag can be read or written by the program. Therefore, when it is set to “1”, an interrupt can be
generated by the software. By writing “0” to the flag, the interrupt pending status can be canceled.
3
2
1
0
Address On reset
R/W
0
0
0
IRQBTM RF : 3DH
0H
R/W
IRQBTM Basic Interval Timer Interrupt Request Flag
0
Interrupt request has not been made.
1
Basic interval timer interrupt request has been made.
3
2
1
0
Address On reset
R/W
0
0
0
IRQ
RF : 3EH
0H
R/W
IRQ INT Pin Interrupt Request Flag
0
Interrupt request has not been made.
1
Interrupt request has been made at rising edge or
falling edge of INT input.
3
2
1
0
Address On reset
R/W
0
0
0
IRQTM RF : 3FH
1H^Note
R/W
IRQTM 8-Bit Timer Interrupt Request Flag
0
Interrupt request has not been made.
1
8-bit timer interrupt request has been made.
Note 1H is also set after releasing STOP mode.
Data Sheet U12643EJ2V0DS00
43