W78E516B
MOV R7,#FFH
MOV TL0,R6
; TH0 = FFH
MOV TH0,R7
MOV TMOD,#01H
MOV TCON,#10H
MOV PCON,#01H
; TMOD = 01H, SET TIMER0 A 16-BIT TIMER
; TCON = 10H, TR0 = 1,GO
; ENTER IDLE MODE FOR LAUNCHING THE IN-SYSTEM
; PROGRAMMABILITY
;********************************************************************************
;* Normal mode 64KB APROM program: depending user's application
;********************************************************************************
NORMAL_MODE:
.
; User's application program
.
.
.
EXAMPLE 2:
;*****************************************************************************************************************************
;* Example of 4KB LDROM program: This lorder program will erase the 64KB APROM first, then reads the new
;* code from external SRAM and program them into 64KB APROM bank. XTAL = 40 MHz
;*****************************************************************************************************************************
.chip 8052
.RAMCHK OFF
.symbols
CHPCON
CHPENR
SFRAL
EQU
EQU
EQU
BFH
F6H
C4H
SFRAH
SFRFD
SFRCN
EQU C5H
EQU
EQU
C6H
C7H
ORG 000H
LJMP 100H
; JUMP TO MAIN PROGRAM
;************************************************************************
;* 1. TIMER0 SERVICE VECTOR ORG = 0BH
;************************************************************************
ORG 000BH
CLR TR0
MOV TL0,R6
MOV TH0,R7
RETI
; TR0 = 0, STOP TIMER0
;************************************************************************
;* 4KB LDROM MAIN PROGRAM
;************************************************************************
ORG 100H
Publication Release Date: February 2000
Revision A3
- 23 -
WINBOND [ WINBOND ]
