參數(shù)資料
型號: UPD4990AC-A
元件分類: 時鐘/數(shù)據(jù)恢復(fù)及定時提取
英文描述: 0 TIMER(S), REAL TIME CLOCK, PDIP14
封裝: DIP-14
文件頁數(shù): 35/51頁
文件大?。?/td> 211K
代理商: UPD4990AC-A
35
CHAPTER 6 APPLICATION CIRCUIT & SOFTWARE
LOOP1:
SEL
MB15
SET1
SIOM.3
LOOPR:
SKTCLR
IRQSIO
BR
LOOPR
MOV
XA, SIO
SEL
MB0
MOV
@HL, XA
; (HL)
← XA
INCS
HL
INCS
HL
DECS
B
BR
LOOP1
POP
HL
RET
;Time write routine
;
TMWR:
PUSH
HL
SEL
MB15
MOV
XA, #10H
CALL
CMDTX
MOV
XA, HL
ADDS
XA, #12
XCH
XA, HL
MOV
@HL, #2
XCH
XA, HL
DECS
HL
MOV
B, #6
LOOPW:
SEL
MB0
MOV
XA, @HL
SEL
MB15
MOV
SIO, XA
SET1
SIOM.3
LOOP2:
SKTCLR
IRQSIO
BR
LOOP2
INCS
HL
INCS
HL
DECS
B
BR
LOOPW
SET1
PORT3.0
CLR1
PORT3.0
POP
HL
RET
;
;TMST:
MOV
XA, #0
CALL
CMDTX
RET
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