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T89C5115-RATIM Datasheet(PDF) 38 Page - ATMEL Corporation

No. de pieza T89C5115-RATIM
Descripción Electrónicos  Low Pin Countl 8-bit Microcontroller with A/D Converter and 16 KBytes Flash Memory
PDF  113 Pages
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Fabricante Electrónico  ATMEL [ATMEL Corporation]
Página de inicio  http://www.atmel.com
Logo ATMEL - ATMEL Corporation

T89C5115-RATIM Datasheet(HTML) 38 Page - ATMEL Corporation

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AT89C5115
4128F–8051–05/06
Figure 16. 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 is
the address of the code byte to read.
Note:
FCON must be cleared (00h) when not used.
Extra Row
The following procedure is used to read the Extra Row space and is summarized in
Figure 17:
•
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 Byte and is sum-
marized in Figure 17:
•
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



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