參數(shù)資料
型號(hào)： EVAL-ADUC7039QSPZ
廠商： Analog Devices Inc
文件頁(yè)數(shù)： 14/92頁(yè)
文件大?。?/td> 0K
描述： BOARD EVAL FOR ADUC7039
設(shè)計(jì)資源： ADuC7039QSPZ Gerber Files
EVAL-ADuC7039 Schematic & Brd Outline
標(biāo)準(zhǔn)包裝： 1
系列： QuickStart™ PLUS 套件
類型： MCU
適用于相關(guān)產(chǎn)品： ADuC7039
所含物品： 板
Data Sheet
ADuC7039
Rev. D | Page 21 of 92
FLASH/EE MEMORY SIGNATURE
The entire 62 kB or the part of Flash/EE memory available to
the user can be signed using the FEESIG register and signature
command.
This feature automatically reads the code in that section of the
memory specified by the FEEADR and FEEDAT MMRS:
FEEADR contains an address situated in the first half page
of the section to be signed.
FEEDAT contains an address situated in the first half page
above the last page of the section to be signed. See Figure 7
in this example, Page 0 and Page 1 are signed.
Figure 7. Signature Command Indexing
If the 8 MSB of FEEADR and FEEDAT are identical, that
is, the MMRS point to the same page, nothing is signed.
The last two 16-bit locations are not included in the
signature; they are reserved for the user-programmed
signature.
It is possible to sign half pages, by specifying a half page
address in FEEADR and FEEDAT. For example, to sign
the second half of Page 0 and the first half of Page 1,
FEEADR = 0x0100 and FEEDAT = 0x0300.
This feature is also used by the on-chip kernel at power-up to
check the validity of Page 0 before jumping to user code. Store
the signature of Page 0 at Address 0x801FC when programming
the device. See the ADuC7039 Kernel section for more details.
Flash/EE Memory Signature Registers
Name:
FEESIG
Address:
0xFFFF0E18
Default Value:
Updated by kernel
Access:
Read only
Function:
This MMR contains a 24-bit signature of the
Flash/EE memory.
Example of User Code Signature
Int a = FEESTA;
// Ensure FEESTA is cleared
FEEADR = 0x0000;
// Start page address
FEEDAT = 0x0600;
// Stop (page + 1) address
FEECON = 0x0B;
// Signs Page 0 to Page 2 excluding
// Address 0x805FC
while (FEESTA & 0x04){}
// Wait for command to finish
User code can compare the content of FEESIG with the content of Address 0x805FC.
Polynomial
A software routine is provided by Analog Devices, Inc., to calculate the unique 24-bit signature.
0x80000
PAGE 0
0x80200
PAGE 1
0x80400
FEEDAT = 0x04XX
FEEADR = 0x00XX
08463-
008
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