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DS90UB949-Q1: Accessing PORT0 and PORT1 individually

user4779049
Expert 2465 points

Part Number: DS90UB949-Q1

He, team,

Please advise me on my questions bellwos:

Page 50 on the datasheet, it is insisted that "Address 0x1E Trnsmitter Port Slection bit 1 PORT1_SELselects Port 1 for register access from primary I2C address. For writes, Port1 registers and shared registers will both written."

Q1. Does it mean that GPIOS and D_GPIOs are configured simultanusly, even though PORT0_SEL bit          is set '0'?

Q2. If so, can you let me know how to cinfigure GPIOs and D_GPIOs individually, other than using                  secondary I2C address?

Mita

  • +1
    TI__Mastermind 42015 points

    Hi Mita,

    user4779049 said:
    Q1. Does it mean that GPIOS and D_GPIOs are configured simultanusly, even though PORT0_SEL bit          is set '0'?

    Only the D_GPIOs will be configured if the PORT1_SEL bit is set. When the description refers to shared registers, these shared registers are not port specific or change functionality based off of the PORT0_SEL or PORT1_SEL.

    user4779049 said:
    Q2. If so, can you let me know how to cinfigure GPIOs and D_GPIOs individually, other than using                  secondary I2C address?

    To configure the D_GPIOs, set 949 MainPage register 0x1E to 0x2. To configure the GPIOs, set 949 MainPage register 0x1E to 0x1.

    Best,

    Jack

  • 0 in reply to Jack Scherlag
    Expert 2465 points

    Jack-san,

    Thank you for the answers.

    Mita