How to recognize the reset source flag ?

Arriy

Expert 1720 points

I'm reading "TMS570LS31x/21x 16/32-Bit RISC Flash Microcontroller Technical Reference Manual(SPNU499B)".

In chapter "2.3.1 Resets".

The documents described flag is set PORST bit in SYSESR register by power-on reset.

But,also flag is set PORST bit in SYSESR register by Voltage Monitor Reset.

Both the same register in the same flag.

How it is possible to distinguish between the two reset factors doing?

over 9 years ago

0 Charles Tsai over 9 years ago

TI__Guru**** 191886 points

Hi Arrly,
Yes, the same flag is set. Both are indication of voltage out of regulation.

0 Arriy over 9 years ago in reply to Charles Tsai

Expert 1720 points

Hi Charles.

I'm to understand that the same flag.

How do I difference between PORST flag by VMON and PORST flag by power-on ?
I don't need to be distinguished ?

BestRegards,
Arriy

0 Charles Tsai over 9 years ago in reply to Arriy

TI__Guru**** 191886 points

Hi Arriy,
You can't distinguish between a reset event caused by the VMON or a reset event caused by external Voltage Supervisor. Either one is an indication the voltage is out of regulation. Note that the external voltage supervisor should have a much tighter tolerance on the voltage range than the internal monitor.

0 Arriy over 9 years ago in reply to Charles Tsai

Expert 1720 points

Hi Charles,
Reset by the VMON out of voltage range can disabled?

And ERROR RESPONSE can select other than the reset ?

0 Charles Tsai over 9 years ago in reply to Arriy

TI__Guru**** 191886 points

Hi Arriy,
No, VMON out of range cannot be disabled. When out of range, the reset is always asserted.

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How to recognize the reset source flag ?