AT89C5115-RATUM datasheet(36/113 Pages) ATMEL

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AT89C5115

4128F–8051–05/06

Figure 14. Column Latches Loading Procedure

(1)

Note:

1. 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 15:

•

Load up to one page of data in the column latches from address 0000h to 3FFFh.

•

Save then disable the interrupts.

•

Launch the programming by writing the data sequence 50h followed by A0h in

FCON register.This step must be executed from FM1.

The end of the programming indicated by the FBUSY flag cleared.

•

Restore the interrupts.

Extra Row

The following procedure is used to program the Extra Row space and is summarized in

Figure 15:

•

Load data in the column latches from address FF80h to FFFFh.

•

Save then disable the interrupts.

•

Launch the programming by writing the data sequence 52h followed by A2h in

FCON register. This step of the procedure must be executed from FM1.

The end of the programming indicated by the FBUSY flag cleared.

•

Restore the interrupts.

Column Latches

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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