TUSB1064: SCH

Driscoll Tsai

Expert 1590 points

Part Number: TUSB1064
Other Parts Discussed in Thread: TPS65988

Hi Sir,

My signal source is type-c from notebook, through TUSB1064 and output don't have DP signal at monitor.

Could you help check sch? This is GPIO control by TPS65988.

function block

SCH

Regards,

Driscoll

over 6 years ago

0 David (ASIC) Liu over 6 years ago

TI__Guru**** 177301 points

Driscoll

1. The block diagram show the Synaptics hub supports 4 DP lanes, but the schematic shows only 2 lanes connected to the Synaptics hub input, are you only supporting 2 lanes or 4 lanes DP?

2. Do you have AC coupling caps on the TX1p/n, RX1p/n, TX2p/n, and RX2p/n? What are the values of the AC coupling caps?

3. The cap value on SSRX0Bp/n is too large, I would recommend 100nF is sufficient.

4. For GPIO control, what is the voltage on FLIP, CTL0, and CTL1?

5. What is the voltage on AUXP/N, and SBU1/2?

6. What is the voltage on HPD?

7. Do you have CC and AUX log file that I can review?

Thanks

David

0 Brian Zhou over 6 years ago in reply to David (ASIC) Liu

TI__Guru*** 146055 points

Can you reply David?s question?

0 Driscoll Tsai over 6 years ago in reply to Brian Zhou

Expert 1590 points

Hi Sir,

Thanks for your help & check hints.

We find it may cause by Synaptics Hub VMM5320 issue, and will check its setting.

Regards,

Driscoll

0 David (ASIC) Liu over 6 years ago in reply to Driscoll Tsai

TI__Guru**** 177301 points

Driscoll

Thanks for the update, I will close this thread for now. You can re-open this thread by replying to it or open a new thread.

Thanks

David

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TUSB1064: SCH