DS90UB635-Q1: FPD-Link III

Hello,

There are several aspects of the system that can lead to no output. The first thing to check is lock. Read register 0x4D several times on the deserializer, and take note of bits 0 and 4. If the devices have stable lock, you should see 0x4D[0] = 1 and 0x4D[4] = 0. If this is not the case the devices do not have lock, which indicates there is either a misconfiguration or a hardware problem between the deserializer and the camera module. Once lock is verified move on to checking the camera output, and verify that the camera initialization and GPIO signals are correct. Each camera has a unique initialization requirement and if the camera is changed the previous process will likely not result in the camera streaming correctly. You can also use patgen on both deserializer and serializer to verify that the data pipeline is functional and that the SoC is able to receive data.