Part Number: TMS320F28027
I used UniFlash to try to lock TMS320F28027.
The procedure resulted with some error that I do not remember.
After that, I was not able to unlock the TMS with the same lock key.
Also, I was not able to use the TMS at all, so I have to go through the trouble of replacing it with the new device.
Since I am required to lock the device, please, let me know what is the step by step procedure to successfully lock and unlock TMS320F28027 device by using UniFlash tool.
Can you please let us know how did you try to program the device earlier which locked the device permanently? Please note that the flash operations should never get interrupted else such condition could happen.
If my reply answers your question please click on "This resolved my issue" button located at the bottom of my post.
In reply to Vivek Singh:
In reply to Vlad Pavlovic:
I tried it again, and instead of LOCK step clicked PASSWORD< and the result is the same. So, I have to unsolder yet another chip and put the new one in. This is not a hobby project, this has to go into production, and the DSP has to be locked.
I tried it further to unlock it and got the following: "
If flash operation is not interrupted then I don't think device is permanently locked. Once you lock the device, you may not be able to connect to it via JTAG and unless you connect it you can not run the unlock sequence. To enable JTAG connection, you need to use the "wait" boot mode. See following note in BOOT ROM document.
My question is what is the proper step by step procedure to lock TMS320F28027 device using UniFlash?
I gave you my procedure, and went into trouble to brick another board of mine, and to resolder the chip again.
Based on your last comment, I have one more question: How to set "wait" mode using UniFlash tool for TMS320F28027 step by step procedure?
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