F021 flash controller "busy" status

Andrey Smirnov

Hello,

From reading SPNU499B and SPNA148 it looks like there are at least three different places where I can query busy status of the Flash subsystem:

FBBUSY register
FMSTAT register (BUSY bit)
FSM_EXECUTE register (FSMEXECUTE bits)

Oh and also there's also FBPRDY. Which one of these if preferable way to determine that flash write/erase operation is finished during programming of the device(I know that SPNA148 says to use FMSTAT but since it does not acknowledge the existence of other sources of this information I am a little bit confused)?

Thanks!

over 11 years ago

0 Enrique Lizarraga over 11 years ago

TI__Expert 4580 points

Hello:

We have received your question and it will be directed to our expert. We will get back to you soon.

Regards.

0 Siddharth Deshpande over 11 years ago in reply to Enrique Lizarraga

TI__Mastermind 35515 points

Hello,

The preferred way is to check the BUSY bit in the FMSTAT register. This bit indicates whether the Flash State Machine is Busy performing any Flash operation.

Thanks,

Siddharth

0 Andrey Smirnov over 11 years ago in reply to Siddharth Deshpande

Prodigy 120 points

Hi Siddarth,

Thank you for your answer, it does shed some light on how to use it. Can you explain a little bit more what is the difference between those registers?

Thank you

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F021 flash controller "busy" status