W78E58B_06 Datasheet, PDF (32/36 Pages) Winbond – 8-BIT MICROCONTROLLER

W78E58B/W78E058B
MOV TCON, #00H
MOV IP, #00H
MOV IE, #82H
MOV R6, #F0H
MOV R7, #FFH
MOV TL0, R6
MOV TH0, R7
MOV TMOD, #01H
MOV TCON, #10H
MOV PCON, #01H
; TR = 0 TIMER0 STOP
; IP = 00H
; TIMER0 INTERRUPT ENABLE FOR WAKE-UP FROM IDLE MODE
; 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
; PROGRAMMING
;********************************************************************************
;* Normal mode 32KB APROM program: depending user's application
;********************************************************************************
NORMAL_MODE:
.
; User's application program
.
.
.
EXAMPLE 2:
;******************************************************************************************************************************
Example of 4 KB LDROM program: This loader program will erase the 32KB APROM first, then reads the new ;*
code from external SRAM and program them into 32 KB APROM bank. XTAL = 16 MHz
;*****************************************************************************************************************************
.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 LDROM MAIN PROGRAM
;************************************************************************
ORG 100H
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