Help : What's the output of ROM code ?

Justfora

When no avaliable memory card or external interface , what will be output through UART3?

I just see "40W" at this case while I found some reference design board showed what the first output is "40T" , What does this mean?

Thanks!

over 15 years ago

0 gkturner over 15 years ago

TI__Intellectual 1250 points

This is the boot ROM code going through a sequence of peripherals looking for one to boot from. There is a handshaking procedure from the boot ROM code to each peripheral. The SYS_BOOT pin settings of a device determine the order that the peripherals are tried. The UART output is an artifact from this procedure.

Hope that helps.

Greg

0 Justfora over 15 years ago in reply to gkturner

Prodigy 230 points

Thanks Greg.

Our system has been booted up and the OS can be running now!

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Help : What's the output of ROM code ?