TMS320F280025C: OTP failure rate

Yogini Joshi

Intellectual 290 points

Part Number: TMS320F280025C
Other Parts Discussed in Thread: SYSCONFIG

Hello,

what is the failure rate of OTP memory in the above mentioned controller.

Also, what are the failure causes of OTP write operation and what is its probability in terms of ppm?

over 1 year ago

0 Hareesh Janakiraman over 1 year ago

TI__Guru* 95315 points

Yogini Joshi said:
what is the failure rate of OTP memory in the above mentioned controller.

The technology used for the Flash/OTP memory is fairly mature by now, with millions of devices shipped. As such, the "failure rate" is extremely low.

Yogini Joshi said:
Also, what are the failure causes of OTP write operation and what is its probability in terms of ppm?

When the TI-issued guidelines are followed (in terms of HW & SW), the failure rate should be in single-digit PPM (from a OTP perspective)

0 Yogini Joshi over 1 year ago in reply to Hareesh Janakiraman

Intellectual 290 points

Thanks for the clarification Hareesh. Just one small question:

we are securing Flash and RAM by configuring OTP zones. Do you anticipate any risk, if we do not test it for each and every unit?

+1 Hareesh Janakiraman over 1 year ago in reply to Yogini Joshi

TI__Guru* 95315 points

Yogini,

The DCSM module, like any other module, is tested as part of our production flow. Once you have understood what security settings are warranted for your application and have configured them properly using Sysconfig and programmed them in the OTP, you only need to test one device thoroughly to ensure the security settings are what you had intended. There is no reason to test this on each and every unit.

0 Yogini Joshi over 1 year ago in reply to Hareesh Janakiraman

Intellectual 290 points

Thanks a lot Hareesh. This is really helps.

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TMS320F280025C: OTP failure rate