TDA4VM: EVM with Displayport#0 connected does not boot

Gunter Schmer

Part Number: TDA4VM

Hi,

I am seeing a strange booting behavior on a new TDA4VM EVM:

An EVM that is ready to boot from SDCARD, if Displayport#0 is connected to a monitor and turning the power switch on, the EVM does not boot, the LED LD6 and LD5 do NOT turn on, only LD7 turns on.

If the Displayport#0 is disconnected, the EVM boots correctly and all LED LD7, LD6, LD5 turn on. After the successful boot, hot plugging the Displayport#0 to the monitor works and the display also works.

So this must be a problem at startup maybe during power sequencing.

Is this a known issue?

HW:

PROC078E8A(001)

PROC079E3D

SW:

Linux SDK 7.3 with prebuilt binaries

Regards,

--Gunter

over 5 years ago

0 Gunter Schmer over 5 years ago

TI__Genius 14412 points

Hi,

LD5 does not turn on: VSYS_IO_3V3 may not turn on.

LD6 does not turn on: VSYS_MCUIO_3V3 may not turn on.

What could be the reason and how could this be tied to the "Displayport #0 connected to a Monitor" during power up.

Thanks,

--Gunter

0 Gunter Schmer over 5 years ago in reply to Gunter Schmer

TI__Genius 14412 points

Hi,

I swapped the SOM/CP Board on two sets. The problem seems to follow the SOM.

A known to work SOM works on both CP Boards.

A failing SOM fails booting on both CP boards when Displayport#0 is connected (LD5, LD6 off), only boots with Displayport #0 disconnected.

The

Processors

Processors forum

TDA4VM: EVM with Displayport#0 connected does not boot