TMS570LS1114: OTP memory of the Flash Banks 0 and 7

Bernhard_87

Part Number: TMS570LS1114

Hello,

I have questions about the OTP. The TMS570LS1114 has two customers OTP memories. We want to use the OTP memories for our data. I read, that the first 16 byte of the OTP of Flash bank 0 contains a AJSM secure key. I assume that these bytes are not available for our data.

1) Is there any other double usage of the cutsomer OTP memory?

2) Can we use the OTP ranges 0xF000_0010 - 0xF000_0FFF and 0xF000_E000 - 0xF000_E7FF without further restrictions?

3) Is there an overwrite possible? Can a second write access clear further bits of the OTP memory?

Thanks,

Bernhard

over 7 years ago

0 Miro over 7 years ago

TI__Mastermind 21425 points

Hello Bernhard,
Please, take a look at this thread: e2e.ti.com/.../1069751

Best regards,
Miro

0 Bernhard_87 over 7 years ago in reply to Miro

Prodigy 160 points

Hello,
the first two questions are not answered. The TMS570LS1114 does not have a flash bank 1. Also I can not use it.
1) Is there any other double usage of the customer OTP memory?

2) Can we use the OTP ranges 0xF000_0010 - 0xF000_0FFF and 0xF000_E000 - 0xF000_E7FF without further restrictions?

3) Is there an overwrite possible? Can a second write access clear further bits of the OTP memory?
I think the answer is no. How is the protection implemented?
3a ) Is every byte protected against further writes?
3b ) Is the protection against further writes for each bank width (144 bit) or flash sector?

0 Miro over 6 years ago in reply to Bernhard_87

TI__Mastermind 21425 points

Hello,
I am closing this thread because it was answered here: e2e.ti.com/.../760553

Best regards,
Miro

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TMS570LS1114: OTP memory of the Flash Banks 0 and 7