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T89C5115-RATIM Datasheet(PDF) 34 Page - ATMEL Corporation |
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T89C5115-RATIM Datasheet(HTML) 34 Page - ATMEL Corporation |
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34 / 105 page  34 T89C5115 4128A–8051–04/02 Figure 13. Flash and Extra row Programming Procedure Hardware Security Byte The following procedure is used to program the Hardware Security Byte space and is summarized in Figure 14: • Set FPS and map Hardware byte (FCON = 0x0C) • Save and disable the interrupts. • Load DPTR at address 0000h. • Load Accumulator register with the data to load. • Execute the MOVX @DPTR, A instruction. • Launch the programming by writing the data sequence 54h followed by A4h in FCON register (only from FM1). The end of the programming indicated by the FBusy flag cleared. • Restore the interrupts Flash Spaces Programming Save & Disable IT EA= 0 Launch Programming FCON= 5xh FCON= Axh End Programming Restore IT Column Latches Loading see Figure 12 FBusy Cleared? Clear Mode FCON = 00h |
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