Rainbow-electronics AT89C5131 Uživatelský manuál stáhnout pdf (Strana 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

see Figure 15

FBusy

Cleared?

Erase Mode

FCON = 00h

1 2 ... 26 27 28 29 30 31 32 33 34 35 36 ... 174 175

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Rainbow-electronics AT89C5131 Uživatelský manuál Strana 31