參數(shù)資料
型號(hào)： TMS320F28044ZGMS
廠商： Texas Instruments, Inc.
元件分類： 數(shù)字信號(hào)處理
英文描述： Digital Signal Processor
中文描述： 數(shù)字信號(hào)處理器
文件頁(yè)數(shù)： 26/107頁(yè)
文件大?。?/td> 784K
代理商： TMS320F28044ZGMS
www.ti.com
3.2.9
Security
TMS320F28044
Digital Signal Processor
SPRS357B–AUGUST 2006–REVISED MAY 2007
The device supports 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
For code security operation, all addresses between 0x3F7F80 and 0x3F7FF5 cannot be
used as program code or data, but must be programmed to 0x0000 when the Code
Security Password is programmed. If security is not a concern, addresses 0x3F7F80
through 0x3F7FEF may be used for code or data. Addresses 0x3F7FF0 – 0x3F7FF5 are
reserved for data variables and should not contain program code.
The 128-bit password (at 0x3F 7FF8 - 0x3F 7FFF) must not be programmed to zeros.
Doing so would permanently lock the device.
NOTE
Code Security Module Disclaimer
THE CODE SECURITY MODULE ("CSM") INCLUDED ON THIS DEVICE WAS
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.
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.
26
Functional Overview
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