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): 79/95頁(yè)
文件大?。?/td> 339K
代理商: S3P1860-DK
S3C1840/C1850/C1860/P1860
REMOTE CONTROL TX. APPLICATION NOTE
7-23
;;;*********************************************
;;; A
← #0h
;;; A
← A-1_TWICE
;;; output P3
;;; I_TWICE
← I_TWICE + I_TWICE
;;; ;*********************************************
CLR
A
; A
← #0FH
ADDS
A, #0FH
;
MOV
L, #1_TWICE
;
XCH
@HL,A
; A
← A-I_TWICE
SUBS
A,@HL
;
OUT
P3,@SL+A
; low port3
SUBS
A,@HL
;
MOV
@HL,A
; recover I_TWICE
ADDS
A,@HL
;
MOVZ
@HL,A
; I_TWICE
← I_TWICE + I_TWICE
JPL
KEYIN
;;;*********************************************
;; check double key at each port
;; if a key pressed, do adds instruction
;; otherwise, induce overflow occurrence
;;;*********************************************
KEYCHEK
CLR
A
ADDS
A,#0FH
; A
← #0fh
CPNE
L,#0EH
JP
.+2
ADDS
A,#1
; A
← #0
CPNE
L,#0DH
JP
.+2
ADDS
A,#2
; A
← #1
CPNE
L,#0BH
JP
.+2
ADDS
A,#3
; A
← #2
CPNE
L,#7
JP
.+2
ADDS
A,#4
; A
← #3
RET
;
; *********************************************
ORG
0100H
JPL
RESET
; *********************************************
KEYIN
MOV
L,#0DH
CLRB
P2.(L)
;;; select port0 ---------------------------------
IN
A, P0
MOV
L,A
CPNE
L,#0FH
; is key pressed in port0 ?
JP
PORT0
JP
PORT1
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