Rainbow-electronics T89C51CC02 Uživatelský manuál stáhnout pdf (Strana 26)

26 Rev.A - May 17, 2001

Preliminary

T89C51CC02

7.3.7. Reading the FLASH Spaces

User

The following procedure is used to read the User space and is summarized in Figure 11:

• 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 11:

• 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 11:

• 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 11. 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

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Rainbow-electronics T89C51CC02 Uživatelský manuál Strana 26