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(yè)數(shù): 76/95頁(yè)
文件大小: 339K
代理商: S3P1860-DK
S3C1840/C1850/C1860/P1860
REMOTE CONTROL TX. APPLICATION NOTE
7-21
;*********************************************
ORG
0F00H
;*********************************************
; If reset occurs, PA register is immediately initialized to #0FH
RESET
MOV
L,#1
; close indicator LED
SETB
P2.(L)
;
MOV
L,#6
; non-select P2.6
SETB
P2.(L)
;
PRTCLR
CLR
A
;
OUT
P3,@SL + A
; low all the output ports
MOV
L,#5
; (except P2.0, P2.1, P2.6)
CLRB
P2.(L)
;
DECS
L
;
CPNE
L,#1
;
JP
.-3
;
;;; initial all of the variables --------------------------------------------------
;;;
→ input ports are connected with pull-up resistor
;;;
→ Therefore, normal state → high
MOV
H,#0
; H register selects file #0
MOV
L,#O_INP0
; port0 is #0fh
MOV
@HL+,#0FH
MOV
L, #O_INP1
; port1 is #0fh
MOV
@HL +,#0FH
MOV
L, #O_OUTP
; the strobe out is #0fh
MOV
@HL+,#0FH
MOV
L,#DEBOCNT
; debounce count is #0
MOV
@HL+,#0
MOV
L,#CONKEY
; continuous key is #0
MOV
@HL+,#0
;;; check each input port (=key input) ------------------------------------
MOV
L,#0DH
; check port0
CLRB
P2.(L)
;
IN
A,P0
;
MOV
L,A
;
CPNE
L,#0FH
;
JP
DELAYP0
;
MOV
L,#0DH
; check port1
SETB
P2.(L)
;
IN
A,P0
;
MOV
L,A
;
CPNE
L,#0FH
;
JP
J_MAIN
;
;;; halt mode, after halt mode release, go to reset ------------------
MOV
L,#0CH
SETB
P2.(L)
; halt mode
CLRB
P2.(L)
; halt mode release
JP
RESET
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