T89C51AC2-RLSI-M datasheet(28/117 Pages) ATMEL

No. de pieza	T89C51AC2-RLSI-M

Descripción Electrónicos	8-bit MCU with 32K bytes Flash, 10 bits A/D and EEPROM

PDF	117 Pages

Scroll/Zoom	100%

Fabricante Electrónico	ATMEL [ATMEL Corporation]

Página de inicio	http://www.atmel.com

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28 / 117 page

Draft.A - March 30, 2001

Preview - Confidential

T89C51AC2

7.4.7. Reading the FLASH Spaces

User

The following procedure is used to read the User space and is summarized in Figure 15:

• 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 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.

Hardware Security

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.

Figure 15. 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

T89C51AC2-RLSI-M Datasheet(PDF) 28 Page - ATMEL Corporation