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T89C5115-RATIM データシート(PDF) 34 Page - ATMEL Corporation

部品番号 T89C5115-RATIM
部品情報  Low Pin Count 8-bit MCU with A/D Converter and 16-Kbytes of Flash Memory
PDF  105 Pages
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メーカー  ATMEL [ATMEL Corporation]
ホームページ  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C5115-RATIM データシート(HTML) 34 Page - ATMEL Corporation

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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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