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參數(shù)資料
型號: W78LE516A
廠商: WINBOND ELECTRONICS CORP
元件分類: 8位微控制器
英文描述: 8-BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 34/37頁
文件大小: 256K
代理商: W78LE516A
W78LE516/W78L516A
- 34 -
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
ANL A, #80H
CJNE A, #80H, UPDATE_64K ; CHECK H/W REBOOT MODE
MOV CHPCON, #03H ; CHPCON = 03H, ENABLE IN-SYSTEM PROGRAMMING.
MOV CHPENR, #00H ; DISABLE CHPCON WRITE ATTRIBUTE
MOV TCON, #00H ; TCON = 00H, TR = 0 TIMER0 STOP
MOV TMOD, #01H ; TMOD = 01H, SET TIMER0 A 16BIT TIMER
MOV IP, #00H ; IP = 00H
MOV IE, #82H ; IE = 82H, TIMER0 INTERRUPT ENABLED
MOV R6, #F0H
MOV R7, #FFH
MOV TL0, R6
MOV TH0, R7
MOV TCON, #10H ; TCON = 10H, TR0 = 1, GO
MOV PCON, #01H ; ENTER IDLE MODE
UPDATE_64K:
MOV CHPENR, #00H ; DISABLE CHPCON WRITE-ATTRIBUTE
MOV TCON, #00H ; TCON = 00H, TR = 0 TIM0 STOP
MOV IP, #00H ; IP = 00H
MOV IE, #82H ; IE = 82H, TIMER0 INTERRUPT ENABLED
MOV TMOD, #01H ; TMOD = 01H, MODE1
MOV R6, #E0H ; SET WAKE-UP TIME FOR ERASE OPERATION, ABOUT 15 mS. DEPENDING
; ON USER'S SYSTEM CLOCK RATE.
MOV R7, #B1H
MOV TL0, R6
MOV TH0, R7
ERASE_P_4K:
MOV SFRCN, #22H ; SFRCN (C7H) = 22H ERASE 64K
MOV TCON, #10H ; TCON = 10H, TR0 = 1, GO
MOV PCON, #01H ; ENTER IDLE MODE (FOR ERASE OPERATION)
;*********************************************************************
;* BLANK CHECK
;*********************************************************************
MOV SFRCN, #0H ; READ 64KB AP FLASH EPROM MODE
MOV SFRAH, #0H ; START ADDRESS = 0H
MOV SFRAL, #0H
MOV R6, #FEH ; SET TIMER FOR READ OPERATION, ABOUT 1.5
μ
S.
MOV R7, #FFH
MOV TL0, R6
MOV TH0, R7
BLANK_CHECK_LOOP:
SETB TR0 ; ENABLE TIMER 0
MOV PCON, #01H ; ENTER IDLE MODE
MOV A, SFRFD ; READ ONE BYTE
CJNE A, #FFH, BLANK_CHECK_ERROR
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