SN8P2606 Просмотр технического описания (PDF) - Sonix Technology Co., Ltd

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SN8P2606

8-Bit Micro-Controller

Sonix Technology Co., Ltd 

SN8P2608

8-Bit Micro-Controller

2.1.1.2 INTERRUPT VECTOR (0008H)

A 1-word vector address area is used to execute interrupt request. If any interrupt service executes, the program

counter (PC) value is stored in stack buffer and jump to 0008h of program memory to execute the vectored interrupt.

Users have to define the interrupt vector and the first instruction at ORG 8 must be “JMP” or “NOP”. The following

example shows the way to define the interrupt vector in the program memory.

’ Note: ”PUSH”, “POP” instructions save and load ACC/PFLAG without (NT0, NPD). PUSH/POP buffer is a

unique buffer and only one level.

’ Note: The first instruction at ORG 8 must be “JMP” or “NOP”.

¾ Example: Defining Interrupt Vector. The interrupt service routine is following ORG 8.

.CODE

ORG

JMP

…

0

START

; 0000H

; Jump to user program address.

ORG

8

NOP

PUSH

…

…

POP

RETI

…

; Interrupt vector.

; The first instruction at ORG 8.

; Save ACC and PFLAG register to buffers.

; Load ACC and PFLAG register from buffers.

; End of interrupt service routine

START:

…

…

JMP

…

START

; The head of user program.

; User program

; End of user program

ENDP

; End of program

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Version 1.4

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