參數(shù)資料
型號(hào): S3P1860-DK
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP20
封裝: 0.300 INCH, DIP-20
文件頁數(shù): 85/95頁
文件大?。?/td> 339K
代理商: S3P1860-DK
S3C1840/C1850/C1860/P1860
REMOTE CONTROL TX. APPLICATION NOTE
7-29
;*********************************************
ORG
0300H
JPL
RESET
;*********************************************
;;; select only a key ------------------------------------------------
KEYSCAN
MOV
H,#4
;;; product custom code -------------------------------------------
MOV
L,#6
; P2.6
← low
CLRB
P2.(L)
; check custom code
MOV
L,#0DH
;
CLRB
P2.(L)
;
IN
A,P0
;
MOV
L,#CUS2
; CUS2 is the complement of CUS0
MOV
@HL,A
;
NOTI
A
;
DECS
A
;
MOV
L,#CUS0
;
MOV
@HL,A
;
MOV
L,#0DH
SETB
P2.(L)
; CUS3 is the complement of CUS1
IN
A,P0
;
MOV
L,#CUS3
;
MOV
@HL,A
;
ADDS
A,@HL
;
NOTI
A
;
DECS
A
;
MOV
L,#CUS1
;
MOVZ
@HL,A
;
MOV
L,#6
; high P2.6
SETB
P2.(L)
MOV
L,#1
; the indicator LED of a key input
CLRB
P2.(L)
;;; product data code -------------------------------------------------
MOV
H,#0
MOV
L,#O_INP0
; DAT0
← O_INP0
MOV
A,@HL
MOV
H,#4
MOV
L,#DAT0
MOVZ
@HL,A
ADDS
A,#0FH
; A
← #0fh
CPNE
@HL,A
; does input key exist in port0?
JP
DAT_P0
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