W79E201 Datasheet, PDF (86/87 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E201
MOV R7,#FFH
MOV TL0,R6
MOV TH0,R7
MOV DPTR,#0H
; The start address of sample code
MOV R2,#0H
; Target low byte address
MOV R1,#0H
; Target high byte address
MOV SFRAH,R1
; SFRAH, Target high address
MOV SFRCN,#00H ; SFRCN = 00H, Read AP Flash EPROM
READ_VERIFY_64K:
MOV SFRAL,R2
; SFRAL = LOW ADDRESS
MOV TCON,#10H ; TCON = 10H, TR0 = 1,GO
MOV PCON,#01H
INC R2
MOVX A,@DPTR
INC DPTR
CJNE A,SFRFD,ERROR_64K
CJNE R2,#0H,READ_VERIFY_64K
INC R1
MOV SFRAH,R1
CJNE R1,#0H,READ_VERIFY_64K
;******************************************************************************
;* PROGRAMMING COMPLETLY, SOFTWARE RESET CPU
;******************************************************************************
MOV TA,#AAH
MOV TA,#55H
MOV CHPCON,#83H
; SOFTWARE RESET. CPU will restart from AP Flash EPROM
ERROR_64K:
DJNZ R4,UPDATE_64K
; IF ERROR OCCURS, REPEAT 3 TIMES.
; IN-SYST PROGRAMMING FAIL, USER'S PROCESS TO DEAL
WITH IT.
.
.
.
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