Rainbow Electronics AT89C5131 User Manual
Page 31
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31
AT89C5131
4136A–USB–03/03
Extra Row
The following procedure is used to program the Extra Row space and is summarized in
Figure 16:
•
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.
The end of the programming indicated by the FBUSY flag cleared.
•
Enable the interrupts.
Figure 16. Flash and Extra Row Programming Procedure
Flash Spaces
Programming
Disable IT
EA = 0
Launch Programming
FCON = 5xh
FCON = Axh
End Programming
Enable IT
EA = 1
Column Latches Loading
FBusy
Cleared?
Erase Mode
FCON = 00h
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