PD17012_15 Datasheet, PDF (111/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
Figure 11-9. Timing Chart of Acknowledging Interrupt (3/3)
(2) When two or more interrupts are used (e.g. INT pin and 12-bit timer)
(a) Hardware priority
Instruction
MOV
POKE
EI
Interrupt
EI
Interrupt
WR, #0011B INTPM1, WR
cycle
cycle
INTE
INT pin
IRQ flag
12-bit timer
IRQTM flag
IP flag
IPTM flag
INT pin interrupt pending period
INT pin interrupt servicing
12-bit timer interrupt pending period
INT pin interrupt acknowledged
12-bit timer
interrupt
servicing
12-bit timer interrupt
acknowledged
(b) Software priority
MOV
POKE
Instruction _{WR, #0011B INTPM1, WR}
EI
INTE
INT pin
IRQ flag
12-bit timer
IRQTM flag
IP flag
IPTM flag
Interrupt MOV
POKE
cycle WR, #0011B INTPM1, WR
EI
Interrupt
cycle
INT pin interrupt pending period
12-bit timer interrupt pending period
12-bit timer interrupt servicing
12-bit timer interrupt acknowledged
INT pin interrupt
servicing
INT pin interrupt
acknowledged
Data Sheet U10101EJ4V0DS
109