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

Part # T89C51AC2-RLSI-M
Description  8-bit MCU with 32K bytes Flash, 10 bits A/D and EEPROM
PDF  117 Pages
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Manufacturer  ATMEL [ATMEL Corporation]
Direct Link  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

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

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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



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