TMS570LS12x/11x Hercules Development Kit Power Problem

Mehmet Karadeniz

We have 5 TMS570LS12x/11x Hercules Development Kit (TMDX570LS12HD) and all af them have the same problem. DS4(3.3V Led) and DS2(1.2V Led) are off.So all of the kits doesnt work. When we are debugging we see this image. What is the problem? 5 kits have typical problem why?

over 11 years ago

0 Chuck Davenport over 11 years ago

TI__Guru 59540 points

Hello Mehmet,

Given the power indication LEDs are not lit, it would seem there is some issue surrounding either the incoming power to the board or with the regulator that generates the 3.3V and 1.2V supplies on the HDK. That fact that you are seeing this fault on all 5 of the HDKs you have indicates there may be an issue with the main supply to the board. I am forwarding your post to the deisgner of the HDK so that they can help troubleshoot what might be causing your issues.

0 QJ Wang over 11 years ago in reply to Chuck Davenport

TI__Guru**** 197186 points

Hello Mehmet,

The 3.3V regualtor might be damaged or assembled inproperly. Can you probe TP12 (right top, close to C165, C166), TP14, and TP16. TP14 and TP16 are located at right side (close to J9).

Regards,

0 Mehmet Karadeniz over 11 years ago in reply to QJ Wang

Prodigy 95 points

Hello gentlemens,

Thank you for your reply.

Chuck in our system some IO pins came MCU about 4.5-5V but for a short time. It would be a problem?

QJ Wang TP12 5V TP14 0V TP16 0.3V. I think U39 which is 3.3V regulator is working. Problem is other.

0 Chuck Davenport over 11 years ago in reply to Mehmet Karadeniz

TI__Guru 59540 points

Hello Mehmet,

Exposure to the higher voltage (4.5-5V) shouldn't be an issue but it is somewhat dependent on which pins and what the state of those pins were when they exposed to the higher voltages. Below are the spec limits for the device.

0 QJ Wang over 11 years ago in reply to Mehmet Karadeniz

TI__Guru**** 197186 points

Hi Mehmet,

The 3.3V regulator doesn't work. Please contact the distributor for repair or replacement.

Regards,

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TMS570LS12x/11x Hercules Development Kit Power Problem