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T89C5115 Datasheet(PDF) 33 Page - ATMEL Corporation |
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T89C5115 Datasheet(HTML) 33 Page - ATMEL Corporation |
33 / 105 page 33 T89C5115 4128A–8051–04/02 Figure 12. Column Latches Loading Procedure Note: The last page address used when loading the column latch is the one used to select the page programming address. Programming the Flash Spaces User The following procedure is used to program the User space and is summarized in Figure 13: • Load up to one page of data in the column latches from address 0000h to 3FFFh. • Disable the interrupts. • Launch the programming by writing the data sequence 50h followed by A0h in FCON register (only from FM1). The end of the programming indicated by the FBUSY flag cleared. • Enable the interrupts. Extra Row The following procedure is used to program the Extra Row space and is summarized in Figure 13: • Load data in the column latches from address FF80h to FFFFh. • Disable the interrupts. • Launch the programming by writing the data sequence 52h followed by A2h in FCON register (only from FM1). The end of the programming indicated by the FBUSY flag cleared. • Enable the interrupts. Column Latches Loading Data Load DPTR= Address ACC= Data Exec:MOVX @DPTR,A Last Byte to load? Column Latches Mapping FCON = 08h (FPS=1) Data memory Mapping FCON = 00h (FPS = 0) Save & Disable IT EA= 0 Restore IT |
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