SN8P1602AS datasheet(18/94 Pages) SONIX

18 / 94 page

SN8P1600

8-bit micro-controller

SONiX TECHNOLOGY CO., LTD

Page 18

Revision 1.94

Example 2: The demo program includes interrupt service routine and the address of interrupt service

routine is in a special address of general-purpose area.

CHIP SN8P1602

.DATA

PFLAGBUF

.CODE

ORG

; 0000H

JMP

START

; Jump to user program address.

; 0001H ~ 0007H are reserved

ORG

JMP

MY_IRQ

; 0008H, Jump to interrupt service routine address

ORG

10H

START:

; 0010H, The head of user program.

; User program

JMP

START

; End of user program

MY_IRQ:

;The head of interrupt service routine

B0XCH

A, ACCBUF

; B0XCH doesn’t change C, Z flag

B0MOV

A, PFLAG

B0MOV

PFLAGBUF, A

; Save PFLAG register in a buffer

B0MOV

A, PFLAGBUF

B0MOV

PFLAG, A

; Restore PFLAG register from buffer

B0XCH

A, ACCBUF

; B0XCH doesn’t change C, Z flag

RETI

; End of interrupt service routine

ENDP

; End of program

Remark: It is easy to get the rules of SONIX program from demo programs given above. These points are

as following.

1. The address 0000H is a “JMP” instruction to make the program go to general-purpose ROM area. The

0004H~0007H are reserved. Users have to skip 0004H~0007H addresses. It is very important and

necessary.

2. The interrupt service starts from 0008H. Users can put the whole interrupt service routine from 0008H

(Example1) or to put a “JMP” instruction in 0008H then place the interrupt service routine in other

general-purpose ROM area (Example2) to get more modularized coding style.

SN8P1602AS датащи(PDF) 18 Page - SONiX Technology Company

SN8P1602AS датащи(HTML) 18 Page - SONiX Technology Company

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94

датащи скачать

ссылки URL