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T89C51AC2-RLSI-M 数据表(PDF) 28 Page - ATMEL Corporation |
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T89C51AC2-RLSI-M 数据表(HTML) 28 Page - ATMEL Corporation |
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28 / 117 page  28 Draft.A - March 30, 2001 Preview - Confidential T89C51AC2 7.4.7. Reading the FLASH Spaces User The following procedure is used to read the User space and is summarized in Figure 15: • Map the User space by writing 00h in FCON register. • Read one byte in Accumulator by executing MOVC A,@A+DPTR with A= 0 & DPTR= 0000h to FFFFh. Extra Row The following procedure is used to read the Extra Row space and is summarized in Figure 15: • Map the Extra Row space by writing 02h in FCON register. • Read one byte in Accumulator by executing MOVC A,@A+DPTR with A= 0 & DPTR= FF80h to FFFFh. Hardware Security The following procedure is used to read the Hardware Security space and is summarized in Figure 15: • Map the Hardware Security space by writing 04h in FCON register. • Read the byte in Accumulator by executing MOVC A,@A+DPTR with A= 0 & DPTR= 0000h. Figure 15. Reading Procedure FLASH Spaces Reading FLASH Spaces Mapping FCON= 00000xx0b Data Read DPTR= Address ACC= 0 Exec: MOVC A, @A+DPTR Erase Mode FCON = 00h |
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