SN65DPHY440SS: Can two pieces be connected in series

Hui Cao22

Part Number: SN65DPHY440SS

SN65DPHY440SS, Can two pieces be connected in series? Because the CSI line in the middle is relatively long, currently we use two pieces in series and do not use SPI control. Instead, we use resistance-capacitance adjustment control. The chip on the side close to the MPU has no signal.

3 days ago

0 David (ASIC) Liu 2 days ago

TI__Guru**** 182761 points

Hi,

You can cascade two DPHY440 together.

When you are not seeing the signal, can you please share the schematic, and does the issue happen on all lanes? If it is happening on all lanes, are you following the proper LP to HS sequence?

Thanks

David

0 Hui Cao22 2 days ago in reply to David (ASIC) Liu

Expert 1240 points

PHY440二级级联电路框图及原理.pdf

please review.

0 David (ASIC) Liu 1 day ago in reply to Hui Cao22

TI__Guru**** 182761 points

Hi,

I don't see an issue with the DPHY440 portion of the schematic. But from the net name, I don't see how the two DPHY440 are being cascaded together.

Are you able to probe on the DPHY440 data or clock signal to make sure the proper LP to HS sequence has been followed?

Thanks

David

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SN65DPHY440SS: Can two pieces be connected in series