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DS90UB948-Q1: If the GPIO0 can be used on DS90UB948-Q1 as interrupt signal?

Imelda Zhang
Expert 5025 points
Part Number: DS90UB948-Q1
Other Parts Discussed in Thread: DS90UB949-Q1,

Hi,

There is some relationship on DS90UB949-Q1 between SER and DES in GPIO transparent transmission in our previous project.

If we want to use GPIO0 as interrupt signal in DS90UB949-Q1, should GPIO0 must be used as interrupt signal in DS90UB948-Q1? 

If so, may i use D_GPIO0?

  • +1
    TI__Expert 4160 points

    Hi Imelda,

    Typically, you can use the INTB_IN on the 948 to get the interrupt signal and use 947's REM_INTB to mirror the interrupt received on the 948. 

    However, if you are using the GPIO0 pin on the 949 to send the signal, you must use the same GPIO0 on the deserializer side for GPIO0 passthrough.

    D_GPIO requires the use of PORT1_SEL. Since 947 Port 0 GPIO is mapped to 948 port 0 GPIO and 947 port 1 D_GPIOis mapped to 948 port 1 D_GPIO. You cannot interchange port 0 GPIO with port 1 D_GPIO.

    Respectfully,

    William Y.