ST7066U View Datasheet(PDF) - Unspecified
Part Name
Description
MFG CO.
'ST7066U' PDF : 42 Pages View PDF
ST7066U
Ø 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
CALL WRINS_CHK
CALL DELAY37uS
;DISPLAY ON
MOV A,#01H
CALL WRINS_CHK
CALL DELAY1.52mS
;CLEAR DISPLAY
MOV A,#06H
;ENTRY MODE SET
CALL WRINS_CHK
CALL DELAY37uS
;-------------------------------------------------------------------
MAIN_START:
XXXX
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;-------------------------------------------------------------------
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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V2.2
26/42
2006/05/11
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