1. What should ds90ub927q-q1 pay attention to?
2. For example, how to configure the foot position below?
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Re: "1. What should ds90ub927q-q1 pay attention to?"
One thing to consider and connecting to DS90UB940 is the PCLK rate. The minimum Pixel clock frequency supported for DS90UB927 is 5 MHz, but 25 MHz for DS90UB940. Therefore, PCLK needs to be >= 25 MHz to connect to DS90UB940 deserializer successfully.
Re: "2. For example, how to configure the foot position below?"
Since you will be connecting to DS90UB940, which is a newer FPD III device, BKWD should be set to low.