PD17012_15 Datasheet, PDF (103/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
Figure 11-5. Configuration of Interrupt Request Register 4
Name
Flag symbol Address
b3 b2 b1 b0
Interrupt request register 4 0 0 0 I
R
Q
S
I
O
1
3CH
Read/
write
R/W
Sets interrupt request issuing status of serial interface
0 Interrupt request not issued
1 Interrupt request issued
Fixed to 0
Power-on
Clock stop
CE
0000
0
0
11.2.2 Configuration and function of interrupt enable flag (IP×××)
Each interrupt enable flag enables the interrupt of the corresponding peripheral hardware unit.
So that an interrupt is acknowledged, all the following three conditions must be satisfied.
• The interrupt must be enabled by the corresponding interrupt enable flag.
• An interrupt request must be issued by the corresponding interrupt request flag.
• The “EI” instruction (that enables all the interrupts) must be executed.
The interrupt enable flag is assigned to the register file’s interrupt enable register.
Figure 11-6 shows the configuration and function of the interrupt enable register.
Data Sheet U10101EJ4V0DS
101