W78IRD2 Datasheet, PDF (71/76 Pages) Winbond – 8-BIT MICROCONTROLLER

W78IRD2
MOV R6, #F0H
MOV R7, #FFH
MOV TL0, R6
MOV TH0, R7
MOV TMOD, #01H
MOV TCON, #10H
MOV PCON, #01H
; TL0 = F0H
; TH0 = FFH
; 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 AP Flash EPROM program: depending user's application
;********************************************************************************
NORMAL_MODE:
.
; User's application program
.
.
.
EXAMPLE 2:
;*****************************************************************************************************************************
;* Example of 4KB LD Flash EPROM program: This loader program will erase the 64KB AP Flash EPROM first,
;* then reads the new code from external SRAM and program them into 64KB AP Flash EPROM bank.
;* XTAL = 40MHz
;*****************************************************************************************************************************
.chip 8052
.RAMCHK OFF
.symbols
CHPCON
CHPENR
SFRAL
SFRAH
SFRFD
SFRCN
EQU
EQU
EQU
EQU
EQU
EQU
BFH
F6H
C4H
C5H
C6H
C7H
ORG 000H
LJMP 100H
; JUMP TO MAIN PROGRAM
;************************************************************************
;* 1. TIMER0 SERVICE VECTOR ORG = 0BH
;************************************************************************
ORG 000BH
CLR TR0
; TR0 = 0, STOP TIMER0
MOV TL0, R6
MOV TH0, R7
RETI
;************************************************************************
;* 4KB LD Flash EPROM MAIN PROGRAM
;************************************************************************
ORG 100H
MAIN_4K:
MOV SP, #C0H
; BE INITIAL SP REGISTER
MOV CHPENR, #87H ; CHPENR = 87H, CHPCON WRITE ENABLE.
MOV CHPENR, #59H ; CHPENR = 59H, CHPCON WRITE ENABLE.
MOV A, CHPCON
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Publication Release Date: October 2, 2006
Revision A7