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AT89C5131-RDTIL Datasheet(PDF) 33 Page - ATMEL Corporation |
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AT89C5131-RDTIL Datasheet(HTML) 33 Page - ATMEL Corporation |
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33 / 176 page  33 AT89C5131 4136B–USB–09/03 Reading the Flash Spaces User The following procedure is used to read the User space and is summarized in Figure 18: • 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 18: • 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 summa- rized in Figure 18: • 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 18. 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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