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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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STC89LE53RC 데이터시트(PDF) 129 Page - STCmicro Technology Co,.Ltd |
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STC89LE53RC 데이터시트(HTML) 129 Page - STCmicro Technology Co,.Ltd |
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129 / 165 page  9.4 Operating internal EEPROM Demo by Assembly Language ;/*-------------------------------------------------------------------------------------*/ ;/* --- STC MCU International Limited ----------------------------------------*/ ;/* --- STC89xx Series MCU ISP/IAP/EEPROM Demo -----------------------*/ ;/* If you want to use the program or the program referenced in the */ ;/* article, please specify in which data and procedures from STC */ ;/*-------------------------------------------------------------------------------------*/ ;/*Declare SFRs associated with the IAP */ ISP_DATA EQU 0E2H ;Flash data register ISP_ADDRH EQU 0E3H ;Flash address HIGH ISP_ADDRL EQU 0E4H ;Flash address LOW ISP_CMD EQU 0E5H ;Flash command register ISP_TRIG EQU 0E6H ;Flash command trigger ISP_CONTR EQU 0E7H ;Flash control register ;/*Define ISP/IAP/EEPROM operation const for IAP_CONTR*/ ENABLE_ISP EQU 80H ;if SYSCLK>20MHz ;ENABLE_ISP EQU 81H ;if SYSCLK<20MHz ENABLE_ISP EQU 82H ;if SYSCLK<10MHz ;ENABLE_ISP EQU 83H ;if SYSCLK<5MHz DEBUG_DATA EQU 5AH ;Select MCU type DATA_FLASH_START_ADDRESS EQU 2000H ;STC89C/LE52RC ;------------------------------------------------- ORG 0000H LJMP MAIN ;------------------------------------------------- ORG 0100H MAIN: MOV P1, #0F0H ;1111,0000 System Reset OK LCALL DELAY ;Delay MOV P1, #0F0H ;1111,0000 System Reset OK LCALL DELAY ;Delay MOV SP, #0E0H ;Initialize stack pointer ;********************************** ;Read the first byte written into Flash MAIN1: MOV DPTR, #DATA_FLASH_START_ADDRESS LCALL Byte_Read MOV 40H, A CJNE A, #DEBUG_DATA, DATA_NOT_EQU_DEBUG_DATA 129 |
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