DS90UH941AS-Q1: Can D-GPIO of DS90UH941&DS90UH948 pass through DOUT0?

Xinyue Zhang

Prodigy 70 points

Part Number: DS90UH941AS-Q1

Hello,

I want to connect DS90UH941&DS90UH948, and make D-GPIOs pass through.

Please check whether it can work in the two figures.

over 3 years ago

0 Casey McCrea over 3 years ago

TI__Guru** 103215 points

Hello Xinyuwe,

For 94x, the DGPIOs are only available in dual FPD-Link mode. For those picture above you would need to utilize the regular GPIO pins and then it is possible to do what you are trying to do

Best Regards,

Casey

0 Xinyue Zhang over 3 years ago in reply to Casey McCrea

Prodigy 70 points

Hello Casey,

Thanks for your reply.

So if I want to connect DOUT0 of 941 and RINx of 948, I must use GPIOs of 941, instead of D-GPIOs, is that right?

948 also need to be configured as RIN0 to GPIOs, RIN1 to D-GPIOs?

0 Casey McCrea over 3 years ago in reply to Xinyue Zhang

TI__Guru** 103215 points

Xinyue,

D_GPIO is only supported when both RINs are used (dual mode). If only RIN0 or only RIN1 is used (single lane), then regular GPIOs must be used to pass through the FPD-Link.

Best Regards,

Casey

0 Xinyue Zhang over 3 years ago in reply to Casey McCrea

Prodigy 70 points

Hello Casey,

Thanks for your reply.

But I found another answer that sounds different from your reply.

DS90UB941AS-Q1: Could we transmit the signal from 948 GPIO 2 to 941 GPIO 0 or 1 - Interface forum - Interface - TI E2E support forums

941AS port 0->948 port 0 would be GPIO2->GPIO2
941AS port 1->948 port 0 would be D_GPIO2->GPIO2

So how should I understand it? Please help me.

0 Casey McCrea over 3 years ago in reply to Xinyue Zhang

TI__Guru** 103215 points

Hello Xinque,

That is specifically for when the 941AS is in splitter mode connected to two independent DES at the same time. Not for when the 941AS is in single mode connected to one DES on port 0 or port 1.

Best Regards,

Casey