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PC0801ARS-F 데이터시트(PDF) 49 Page - Powertip Technology

부품명 PC0801ARS-F
상세설명  OUTLINE DIMENSION & BLOCK DIAGRAM
PDF  65 Pages
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PC0801ARS-F 데이터시트(HTML) 49 Page - Powertip Technology

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ST7066U
V2.0
2001/03/01
26/42
$" Initial Program Code Example For 8051 MPU(4 Bit Interface):
;-------------------------------------------------------------------
INITIAL_START:
CALL
DELAY40mS
MOV
A,#38H
;FUNCTION SET
CALL
WRINS_ONCE
;8 bit,N=1,5*7dot
CALL
DELAY37uS
MOV
A,#28H
;FUNCTION SET
CALL
WRINS_NOCHK ;4 bit,N=1,5*7dot
CALL
DELAY37uS
MOV
A,#28H
;FUNCTION SET
CALL
WRINS_NOCHK ;4 bit,N=1,5*7dot
CALL
DELAY37uS
MOV
A,#0FH
;DISPLAY ON
CALL
WRINS_CHK
CALL
DELAY37uS
MOV
A,#01H
;CLEAR DISPLAY
CALL
WRINS_CHK
CALL
DELAY1.52mS
MOV
A,#06H
;ENTRY MODE SET
CALL
WRINS_CHK
CALL
DELAY37uS
;-------------------------------------------------------------------
MAIN_START:
XXXX
XXXX
XXXX
XXXX
.
.
.
.
.
.
.
.
.
.
.
.
;-------------------------------------------------------------------
WRINS_CHK:
CALL
CHK_BUSY
WRINS_NOCHK:
PUSH
A
ANL
A,#F0H
CLR
RS
;EX:Port 3.0
CLR
RW
;EX:Port 3.1
SETB
E
;EX:Port 3.2
MOV
P1,A
;EX:Port1=Data Bus
CLR
E
POP
A
SWAP
A
WRINS_ONCE:
ANL
A,#F0H
CLR
RS
CLR
RW
SETB
E
MOV
P1,A
CLR
E
MOV
P1,#FFH
;For Check Bus Flag
RET
;-------------------------------------------------------------------
CHK_BUSY:
;Check Busy Flag
PUSH
A
MOV
P1,#FFH
$1
CLR
RS
SETB
RW
SETB
E
MOV
A,P1
CLR
E
MOV
P1,#FFH
CLR
RS
SETB
RW
SETB
E
NOP
CLR
E
JB
A.7,$1
POP
A
RET



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