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Disabling port 2 on TUSB7320 also disables port 1

Ben Klass
Prodigy 150 points
Other Parts Discussed in Thread: TUSB7320

When the PORT1_DIS bit is set via EEPROM, a device is not visible on port 2. Is this expected behavior?

In the EEPROM, the USB control register is set to 00000100h (address 0Bh = 01, others = default).

Thank you,

ben

  • 0
    TI__Genius 11255 points

    Hello Ben,

                   Disabling a port should only disable this port and not the other one.

                    Could you please clarify what port are you disabling? On the post name you mentioned that you are disabling port 2 but on the message body, you commented you are disabling port 1?

     

                    Anyhow, these are the values that you require to use to disable the ports on the TUSB7320

     

    Disabling port1 -> 0Bh = 01

    Disabling port2 -> 0Bh= 02

     

    Regards,

    Roberto. 

  • 0 in reply to Roberto Diaz
    Prodigy 150 points

    Hello Roberto,

    Sorry for the confusion. The title is incorrect. We are using port 2 and would like to disable port 1. 

    I tried both 0Bh = 02 and 0Bh = 01 and with both the device attached to port 2 did not appear in Device Manager.

    ben