TMS570LS0714: how to lock the JTAG in production flow

Hi Will,

The following steps have to be followed to generate AJSM Keys:

1.Open a HALCoGen Project with HALCoGen Version 4.06.00 or Greater.

2.Go to the “Driver Enable” tab and check 'Enable AJSM'.

3.2 Options:

• HALCoGen “Generate Key” AJSM Unlock Key:
• Manually Feed Key:

Once satisfied with the Key, calculate the ECC, and click “Save Key”. Notice the “New Key” gets saved to the “Visible Key”.

4.Generate the code. File “ajsm.asm” gets generated, which contains the necessary memory or data section with the new AJSM keys. This new ajsm keys are stored in HALCoGen project and when next time same project is opened this key will appears in the “Visible Key” Field.

5.Memory section must be added to the linker file to program the "ajsm" data section to address location 0xF0000000 and “ajsmecc” data section to address location 0xF0400000, before building the project.

6.Build the project.

7.Make sure ECC is calculated and is part of the Image before programming

Note: If ECC locations are not programmed correctly device might be locked permanently.

8.Once device programmed correctly, after reset your JTAG will be locked.

The ECC address for AJSM key is at 0xF0040000 (customer OPT ECC) rather than 0xF0400000 (data flash ECC).

Please double check your linker cmd file: