AM5728: UART boot question

Raman Mistry

Part Number: AM5728

Hi,

What code do you expect to see from the ROM CODE when you first boot up a board. It is selected to be in UART mode. It is connected to Tera Term, 8bit, 1 stop bit, no flow control, baudrate is 115200.

over 7 years ago

0 Biser Gatchev-XID over 7 years ago

TI__Guru**** 393215 points

Hi,

AM57x devices do not output any characters on the UART at boot time. See e2e.ti.com/.../2016378 for details.

0 Raman Mistry over 7 years ago in reply to Biser Gatchev-XID

Prodigy 200 points

Hi Biser,

I have a custom board based on the EVM AM5728, form the UART get VA! continuously, when the board is powered up. should it be "CCCC"?

0 Biser Gatchev-XID over 7 years ago in reply to Raman Mistry

TI__Guru**** 393215 points

No, please read the post I linked above.

0 Raman Mistry over 7 years ago in reply to Biser Gatchev-XID

Prodigy 200 points

OK then what does VA! mean, what is sending it out?

0 Biser Gatchev-XID over 7 years ago in reply to Raman Mistry

TI__Guru**** 393215 points

1. PC terminal should be set to 115200, 8bit, 1 stop bit, EVEN parity, no flow control.
2. Follow the steps in this document to boot from UART: e2e.ti.com/.../AM57_5F00_UART_5F00_Boot_5F00_SOP_5F00_By_5F00_TI_5F00_Rio_5F00_Final.pdf

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AM5728: UART boot question