DS90UB941AS-Q1: GPIO_2 andGPIO_3 can not transmitt to the DS90UB948

Are you trying to set the GPIOx of the 948 through 941AS from the serializer side? Please confirm.

Aaron

Hello Aaron,

       I caonfirm i set the  GPIOx of the 948 through 941AS from the serializer side,with the suggestion from datasheet 8.3.9 as below:

Hello Aaron，

     Plese give me some suggestion to solve the problem.,is there some important register to config?

Hi,

Could you please confirm if you are planning to use GPIO2 (pin 38) and GPIO3 (pin 39) or D_GPIO2 (pin 44) and D_GIO3 (pin43) of the 941AS? I also need if you can provide me the register dump.

Aaron

Hi There,

Just checking back with you if you need further assistance. Configuring the GPIOs should be very straight forward. For example, if you want to route the GPIO3 from 941AS to 948 forward channel, you need to configure the 941AS serializer as input register 0x0F = 0x3 and 948 deserializer to ox1F = 0x5. Now, if you apply a voltage let say 1.8V to GPIO3, you should be able to see the output from the other side of the 948.

Hope this helps. Let me know if you have further questions.

Aaron

Closed this thread as no responds.