參數(shù)資料
型號： T89C51RC2-3CSIM
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： 8-bit Microcontroller with 16 Kbytes/ 32 Kbytes FLASH
中文描述： 8-BIT, FLASH, 40 MHz, MICROCONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 44/170頁
文件大?。?/td> 1927K
代理商： T89C51RC2-3CSIM
44
A/T89C51CC01
4129L–CAN–08/05
Figure 23.
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 where A+DPTR is
the address of the code byte to read.
Note:
FCON is supposed to be reset when not needed.
Extra Row
The following procedure is used to read the Extra Row space and is summarized in
Figure 24:
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 and
DPTR = FF80h to FFFFh.
Clear FCON to unmap the Extra Row.
Hardware Security Byte
The following procedure is used to read the Hardware
Security
space and is
summarized in Figure 24:
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 and
DPTR = 0000h.
Clear FCON to unmap the Hardware Security Byte.
Flash Spaces
Programming
Save and 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 and Disable IT
EA = 0
End Loading
Restore IT
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