Texas Instruments TMS320F2808, TMS320F2809 Disclaimer Code Security Module Disclaimer

TMS320F2809, TMS320F2808, TMS320F2806

TMS320F2802, TMS320F2801, TMS320C2802

TMS320C2801, TMS320F28016, TMS320F28015

www.ti.com SPRS230L –OCTOBER 2003 –REVISED DECEMBER 2009

3.2.10 Security

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 CODE SECURITY MODULE (CSM) INCLUDED ON THIS DEVICE WAS

DESIGNED TO PASSWORD PROTECT THE DATA STORED IN THE ASSOCIATED

MEMORY (EITHER ROM OR FLASH) AND IS WARRANTED BY TEXAS

INSTRUMENTS (TI), IN ACCORDANCE WITH ITS STANDARD TERMS AND

CONDITIONS, TO CONFORM TO TI'S PUBLISHED SPECIFICATIONS FOR THE

WARRANTY PERIOD APPLICABLE FOR THIS DEVICE.

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, TI MAKES NO WARRANTIES OR

REPRESENTATIONS CONCERNING THE CSM OR OPERATION OF THIS DEVICE,

INCLUDING ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR

A PARTICULAR PURPOSE.

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.

Copyright © 2003–2009, Texas Instruments Incorporated Functional Overview 37

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TMS320C2801 TMS320F28016 TMS320F28015