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DS90UB941AS-Q1: GPIO remote output/input

Part Number: DS90UB941AS-Q1

Hi, team

Currently the loop uses the replicate mode of the 941, connect the two displays, the deserializer is 948.

The use of D_GPIO and GPIOs is unclear.

According to the datasheet, it can be clearly D_GPIO transmitted through port1 and GPIO transmitted through port0.

But High-Speed GPIO0 pin only available in Dual Link Mode.

1. Can replicate mode use this D_GPIO as a normal GPIO?

2. DES_CAP2 Register (Address = 0x21)'s bit[1-0]=000,Normal back channel frame, GPIO mode

In this case D_GPIO can I do bidirectional channel transmission? Or can only be made back to the channel? NO.4

3. Can use the high-speed mode of D_GPIO as long as use port1?

4. Is it OK to judge the following situation?

    941AS port 1 → 948 port 0       941 D_GPIO0←948 GPIO0  is OK?

    941AS port 1 → 948 port 0       941 D_GPIO0→948 GPIO0  is OK?

    941AS port 1 → 948 port1        941 D_GPIO0←948 D_GPIO0  is OK?

    941AS port 1 → 948 port1        941 D_GPIO0→948 D_GPIO0  is OK?

    941AS port 0 → 948 port1        941 GPIO0←948 D_GPIO0  is OK?

    941AS port 0 → 948 port1        941 GPIO0→948 D_GPIO0  is OK?

thanks!