UPD17072 datasheet(76/226 Pages) NEC

tên linh kiện	UPD17072

Giải thích chi tiết về linh kiện	4-BIT SINGLE-CHIP MICROCONTROLLER WITH HARDWARE FOR DIGITAL TUNING SYSTEM

PDF	226 Pages

Scroll/Zoom	100%

nhà sản xuất	NEC [NEC]

Trang chủ	http://www.nec.com/

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µPD17072,17073

Figure 11-8. Interrupt Accepting Timing Chart (2/2)

(2) When two or more interrupts are used (e.g., INT pin and basic timer 1)

Note

Because the level of the interrupt stack is 1, multiplexed interrupt cannot be performed.

Instruction

MOV

WR, #0011B

POKE

INTPM1, WR

Interrupt

cycle

Interrupt

cycle

INTE

INT pin

IRQ flag

Basic timer 1

IRQBTM1 flag

IP flag

IPBTM1 flag

INT pin interrupt pending period

INT pin interrupt service routine

Basic timer 1 interrupt pending period

INT pin interrupt accepted

Basic timer 1

interrupt service

Basic timer 1 interrupt accepted

Instruction

INTE

INT pin

IRQ flag

Basic timer 1

IRQBTM1 flag

IP flag

IPBTM1 flag

MOV

WR, #0010B

POKE

INTPM1, WR

Interrupt

cycle

Interrupt

cycle

MOV

WR, #0011B

POKE

INTPM1, WR

INT pin interrupt pending period

Basic timer 1 interrupt pending period

Basic timer 1 interrupt service routine

Basic timer 1 interrupt accepted

INT pin interrupt

accepted

INT pin interrupt

service

(a) Hardware priority

(b) Software priority

RETINote

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