TMS320F280039: FLASH API question

Huihuang Chen

Hi Champ,

If the sector already erased before program , if we use Fapi_issueProgrammingCommand() to program the 8 bytes data and the 8 bytes data are 0xFFFF, may i know the flash content will be programmed or just the ECC value will be programmed?

over 3 years ago

0 Huihuang Chen over 3 years ago

TI__Expert 4060 points

Add more info. : Programming Mode use Fapi_AutoEccGeneration.

0 Vamsi Gudivada over 3 years ago in reply to Huihuang Chen

TI__Guru* 87155 points

Hi Chen,

Only the ECC value will be programmed.

Why is this posted on the internal forum? Can this be discussed on external forum?

Thanks and regards,
Vamsi

0 Huihuang Chen over 3 years ago in reply to Vamsi Gudivada

TI__Expert 4060 points

Hi Vamsi,

Further question, could you advise below 3 case programming time is same or not ?

1. The 8 bytes data are 0xFFFF.

2. 4 bytes data are 0xFFFF, other 4 bytes are not 0xFFFF.

3. All 8 bytes data are not 0xFFFF.

0 Vamsi Gudivada over 3 years ago in reply to Huihuang Chen

TI__Guru* 87155 points

Hi Chen,

Should be almost same since everything involves 1->0 in data or in ECC.

Thanks and regards,
Vamsi

0 Huihuang Chen over 3 years ago in reply to Vamsi Gudivada

TI__Expert 4060 points

Hi Vamsi,

For ECC i understand the time is almost same, but for data from 1->1 and 1->0 are still the same?

Can i thinking case 1 the data will not programming but just programming ECC, case 2 will program 4 bytes data and ECC, case 3 will program 8bytes data and ECC?

+1 Vamsi Gudivada over 3 years ago in reply to Huihuang Chen

TI__Guru* 87155 points

Hi Chen,

Program pulses will be issued if there is a 1->0 transaction anywhere in the data and/or ECC. And the pulses will be issued through out at the same time - hence, there should not be any difference.

In this flash technology, program happens almost in single pulse irrespective of the number of bits in the flash word. Hence, I don't expect any much difference.

Thanks and regards,
Vamsi

0 Vamsi Gudivada over 3 years ago in reply to Vamsi Gudivada

TI__Guru* 87155 points

Hi Chen,

Can I close this post? Or do you have further questions on this topic?

Thanks and regards,
Vamsi

C2000™︎ microcontrollers

C2000 microcontrollers forum

TMS320F280039: FLASH API question