AT89C5131-RDTIL datasheet(33/176 Pages) ATMEL

Teilenummer	AT89C5131-RDTIL

Bauteilbeschribung	8-bit Flash Microcontroller with Full Speed USB Device

PDF	176 Pages

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Hersteller	ATMEL [ATMEL Corporation]

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AT89C5131

4136B–USB–09/03

Reading the Flash Spaces

User

The following procedure is used to read the User space and is summarized in Figure 18:

•

Map the User space by writing 00h in FCON register.

•

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

DPTR = 0000h to FFFFh.

Extra Row

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

Figure 18:

•

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.

Hardware Security

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

rized in Figure 18:

•

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.

Figure 18. Reading Procedure

Flash Spaces Reading

Flash Spaces Mapping

FCON = 00000xx0b

Data Read

DPTR = Address

ACC = 0

Exec: MOVC A, @A+DPTR

Erase Mode

FCON = 00h

AT89C5131-RDTIL Datenblatt(PDF) 33 Page - ATMEL Corporation