TMS570LC4357: Flash API and FBSE register

Matthew Moliassa

I am using the TI Flash API https://www.ti.com/lit/ug/spnu501h/spnu501h.pdf?ts=1668215949142&ref_url=https%253A%252F%252Fwww.google.com%252F for writing to flash. I would like to ensure that at the end of my writes, the Flash-bank sector enable (FBSE) register is zeroed out, and that all flash sectors are protected from writes. I see the function Fapi_enableMainBankSectors, but no corresponding disable sectors function. Is there a method in the API to disable the flash bank sectors, or is this done automatically somehow?

over 3 years ago

0 jagadish gundavarapu over 3 years ago

TI__Guru* 77796 points

Hi Matthew,

I started to work on your issue and i will get back to you soon with an update.

--
Thanks & Regards,
Jagadish.

0 jagadish gundavarapu over 3 years ago in reply to jagadish gundavarapu

TI__Guru* 77796 points

Hi Matthew,

Flash-bank sector enable (FBSE) register bits are zeros after power ON but it is not mentioned any where regarding these bits status after doing erase or program.

So, i would like to test it and confirm. But mean time if needed you can use below code to disable the particular sector from erase and program.

For example:

flashWREG->FBPROT = 0x1;
flashWREG->FBAC = 0x1;
flashWREG->FBSE = 0xFE;

The sector 0 of bank 1 is disabled for erase and program access.

--
Thanks & Regards,
Jagadish.

0 jagadish gundavarapu over 3 years ago in reply to jagadish gundavarapu

TI__Guru* 77796 points

Hi Matthew,

I tested it, and i found the FBSE register bits will not automatically becomes zero after any operation like erase or write.

The user should manually make these bits zero as i mentioned above. Unfortunately, there is no API to disable.

--
Thanks & Regards,

Jagadish.

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TMS570LC4357: Flash API and FBSE register