AT89C51CC03C-RLTIM View Datasheet(PDF) - Atmel Corporation

Part Name

Description

MFG CO.

AT89C51CC03C-RLTIM

Enhanced 8-bit MCU with CAN Controller and Flash Memory

Atmel Corporation 

Figure 26. Flash and Extra Row Programming Procedure

Flash Spaces

Programming

Column Latches Loading

see Figure 25

Save and Disable IT

EA = 0

Launch Programming

FCON = 5xh

FCON = Axh

FBusy

Cleared?

Clear Mode

FCON = 00h

End Programming

Restore IT

Hardware Security Byte

The following procedure is used to program the Hardware Security Byte space

and is summarized in Figure 27:

• 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.

52 AT89C51CC03

4182K–CAN–05/06

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