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Hello,
My customer requests TI's answer. Could you please help us?
My customer question is; All the flash memory bits seems to be protected by ECC, but is it correct ?
I think it is 'Yes'.
The titled part TMS320F28377D has the following flash memory:
- TI OTP
- User configurable DSCM OTP
- Sector A~N
Then each of the the regions has own ECC region, sized 1/8.
And I have read the following pages:
Vamsi,
Thank you for your reply. It may explain my customer problem.
So, let me reconfirm that the following four locations are not proteceted by ECC. Is it correct ?:
- CPU1, 0x70000-0x7800f
- CPU1, 0x70200-0x7820f
- CPU2, 0x70000-0x7800f
- CPU2, 0x70200-0x7820f
- CPU1, 0x78000-0x7800f // corrected on Jan-11-2018
- CPU1, 0x78200-0x7820f
- CPU2, 0x78000-0x7800f
- CPU2, 0x78200-0x7820f
Hideaki-san,
Below details are provided in section 2.13.1.5 Link Pointer and Zone Select of the TRM.
All OTP locations except link pointer locations are protected with ECC. Since the link pointer locations are not protected with ECC, three link pointers are provided that need to be programmed with the same value. The final value of the link pointer is resolved in hardware when a dummy read is done to all the link pointers by comparing all the three values (bit-wise voting logic).
Yes, the locations that you highlighted in the diagram are not protected by ECC.
What is the question that you have regarding the four memory ranges that you mentioned in your text?
Thanks and regards,
Vamsi