AM623: USB DFU Boot (primary and backup) configuration

Hedieh Jahanpanah

Part Number: AM623

Tool/software:

Hi there,

I need to know what the core voltage of USB-DFU in Backup boot is. In Primary bootmode, the value is taken from B9 and, if 0, means 0.85V while 1 means 0.75V. But in Backup boot selection, only B13 determines Mode and no information about core voltage.

over 1 year ago

0 Kallikuppa Sreenivasa over 1 year ago

TI__Guru**** 227885 points

Hello Hedieh Jahanpanah

Thank you for the query.

We were initially specifying the need for 0.85V supply for supporting USB DFU as backup mode.

This is currently not a requirement.

The DFU backup bootmode is supported at 0.75V or 0.85V core voltage.

Regards,

Sreenivasa

0 Hedieh Jahanpanah over 1 year ago in reply to Kallikuppa Sreenivasa

Prodigy 10 points

Thank you for your answer Kallikuppa,

Since both voltage levels are configurable, which of them is default? And is there any HW pin for changing core voltage in backup mode or eveything is handled in SW?

+1 Kallikuppa Sreenivasa over 1 year ago in reply to Hedieh Jahanpanah

TI__Guru**** 227885 points

Hello Hedieh Jahanpanah

Thank you for the inputs.

I presume your question is for the USB boot.

The configuration would depend on the core supply you are using on the board.

Regards,

Sreenivasa

0 Kallikuppa Sreenivasa over 1 year ago in reply to Kallikuppa Sreenivasa

TI__Guru**** 227885 points

Hello Hedieh Jahanpanah

FYI, for the ease of tracking / reuse i changed the E2E thread title as below:

AM623: USB DFU Boot (primary and backup) configuration

Regards,

Sreenivasa

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AM623: USB DFU Boot (primary and backup) configuration