DS90UB962-Q1: CSI error

Hi Ryan,

Refer to registers 0x1D and 0x1E in the datasheet for why 0x90-0x97 all return 0.

But typically, you would only need to monitor the data being received from the serializers for errors. The 962 receiver transfers incoming video frames to internal video buffers for forwarding to the CSI-2 Transmit ports. When the UB962 detects an error condition, the standard operation would be to flag this error condition, and stop sending the CSI-2 frame to avoid sending corrupted data downstream. When the UB962 recovers from an error condition, it will provide a Start of Frame and resume sending valid data. Consequently, when the downstream CSI-2 input receives a repeated Start of Frame condition, this will indicate that the data received in between the prior start of frame is suspect and the signal processor can then discard the suspected data.

Registers 0x7C and 0x7D can be used to change how the DS90UB962-Q1 handles errors when passing video frames. See Section 7.5.10 Error Handling in the datasheet for more information. 

You can also refer to registers 0x4E and 0x7A in the datasheet to monitor errors on the 954's receiver. And the status of the CSI-2 transmitter can be monitored on register 0x35. 

Best,

Justin Phan