參數(shù)資料
型號: TMS320F2801X
廠商: Texas Instruments, Inc.
元件分類: 數(shù)字信號處理
英文描述: Digital Signal Processors
中文描述: 數(shù)字信號處理器
文件頁數(shù): 39/140頁
文件大?。?/td> 1108K
代理商: TMS320F2801X
www.ti.com
3.2.10 Security
TMS320F2809, TMS320F2808, TMS320F2806
TMS320F2802, TMS320F2801
TMS320C2802, TMS320C2801, and TMS320F2801x DSPs
SPRS230J–OCTOBER 2003–REVISED SEPTEMBER 2007
The 280x devices support high levels of security to protect the user firmware from being reverse
engineered. The security features a 128-bit password (hardcoded for 16 wait-states), which the user
programs into the flash. One code security module (CSM) is used to protect the flash/OTP and the L0/L1
SARAM blocks. The security feature prevents unauthorized users from examining the memory contents
via the JTAG port, executing code from external memory or trying to boot-load some undesirable software
that would export the secure memory contents. To enable access to the secure blocks, the user must
write the correct 128-bit KEY value, which matches the value stored in the password locations within the
Flash.
NOTE
The 128-bit password (at 0x3F 7FF8 – 0x3F 7FFF) must not be programmed to zeros.
Doing so would permanently lock the device.
disclaimer
Code Security Module Disclaimer
THE
DESIGNED TO PASSWORD PROTECT THE DATA STORED IN THE ASSOCIATED
MEMORY
(EITHER
ROM
OR
FLASH)
INSTRUMENTS
(TI),
IN
ACCORDANCE
CONDITIONS, TO CONFORM TO TI'S PUBLISHED SPECIFICATIONS FOR THE
WARRANTY PERIOD APPLICABLE FOR THIS DEVICE.
CODE
SECURITY
MODULE
(CSM)
INCLUDED
ON
THIS
DEVICE
WAS
AND
WITH
IS
ITS
WARRANTED
STANDARD
BY
TEXAS
AND
TERMS
TI DOES NOT, HOWEVER, WARRANT OR REPRESENT THAT THE CSM CANNOT BE
COMPROMISED OR BREACHED OR THAT THE DATA STORED IN THE ASSOCIATED
MEMORY CANNOT BE ACCESSED THROUGH OTHER MEANS. MOREOVER,
EXCEPT
AS
SET
FORTH
ABOVE,
REPRESENTATIONS CONCERNING THE CSM OR OPERATION OF THIS DEVICE,
INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE.
TI
MAKES
NO
WARRANTIES
OR
IN NO EVENT SHALL TI BE LIABLE FOR ANY CONSEQUENTIAL, SPECIAL,
INDIRECT, INCIDENTAL, OR PUNITIVE DAMAGES, HOWEVER CAUSED, ARISING IN
ANY WAY OUT OF YOUR USE OF THE CSM OR THIS DEVICE, WHETHER OR NOT
TI HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. EXCLUDED
DAMAGES INCLUDE, BUT ARE NOT LIMITED TO LOSS OF DATA, LOSS OF
GOODWILL, LOSS OF USE OR INTERRUPTION OF BUSINESS OR OTHER
ECONOMIC LOSS.
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Functional Overview
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