T89C5115-RATIM datasheet(35/105 Pages) ATMEL

35 / 105 page

T89C5115

4128A–8051–04/02

Figure 14. Hardware Programming Procedure

Reading the Flash Spaces

User

The following procedure is used to read the User space:

•

Read one byte in Accumulator by executing MOVC A,@A+DPTR with

A+DPTR=read@.

Note:

FCON is supposed to be reset when not needed.

Extra Row

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

Figure 15:

•

Map the Extra Row space by writing 02h in FCON register.

•

Read one byte in Accumulator by executing MOVC A,@A+DPTR with A= 0 &

DPTR= FF80h to FFFFh.

•

Clear FCON to unmap the Extra Row.

Hardware Security Byte

The following procedure is used to read the Hardware Security space and is

summarized in Figure 15:

•

Map the Hardware Security space by writing 04h in FCON register.

•

Read the byte in Accumulator by executing MOVC A,@A+DPTR with A= 0 &

DPTR= 0000h.

•

Clear FCON to unmap the Hardware Security Byte.

Flash Spaces

Programming

Save & Disable IT

EA= 0

Launch Programming

FCON= 54h

FCON= A4h

End Programming

RestoreIT

FBusy

Cleared?

Clear Mode

FCON = 00h

Data Load

DPTR= 00h

ACC= Data

Exec:MOVX @DPTR,A

FCON = 0Ch

Save & Disable IT

EA= 0

End Loading

Restore IT

T89C5115-RATIM Datasheet(PDF) 35 Page - ATMEL Corporation

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