DS90UB927Q-Q1: initial setting

Hi Hui,

Yes, the 927 is compatible with the 948. Using your screen resolution: 1280 X 720 X 60 (FPS) X 1.1 (assuming 10 percent blanking)=~ 61Mhz, PCLK is supported

There is no standard register initialization code. These devices should work without initialization if you correctly configure them using Hardware pins.

I do see that you are using the interrupt pin, please follow 7.3.12 Interrupt Pin (INTB) on the 927 on how to setup registers for 927 for interrupt and read interrupt registers.

Best regards,

William Y.

Hi Hui,

Hui Cao22 said:

what about I2C？need to pay attention to what？

No register settings needs to be configured for I2C to work. Please remember to place I2C pullup resistor on the schematic.

Hui Cao22 said:

How to ensure correct transmission and decoding of I2C signals between FDlinks?

You can attach an I2C waveform analyzer like Saelee logic analyzer on the I2C pins from SOC-> 927 and from 948-> MCU like the picture shown below:

Hui Cao22 said:

Do 927 and 948 need to configure which registers?

Depends on your use case. No initialization registers need to be configured. I only see I2C and INTB pins being used in the block diagram above. As I said above, please follow 7.3.12 Interrupt Pin (INTB) on the 927 on how to setup registers for 927 for interrupt and read interrupt registers.

Best Regards,

William Y.