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TUSB320HAI / LAI DISABLE_TERM

msmn
Intellectual 805 points
Other Parts Discussed in Thread: TUSB320, TUSB320HAI

There's DISABLE_TERM bit in TUSB320 HAI/LAI's General Control Register.

When this bit is set to 1, Rps/Rds on both CC pins are disabled and TUSB320 HAI/LAI goes to Disabled State according to USB Type-C specification.

But our customer asked how they can utilize this bit. 

Please tell me the usage of this bit.

Regards

msmn

  • 0
    TI__Mastermind 36085 points

    Hello,

        You only need an I2C master to communicate with the TUSB320HAI, The I2C master has to configure the register bit. Here you go an script example for the Aardvark I2C/SPI Host Adapter:

     

    Disable the termination:

    <aardvark>
    <configure i2c="1" spi="1" gpio="0" tpower="0" pullups="0"/>
    <i2c_bitrate khz="100"/>

    <i2c_write addr="0x67" count="2" radix="16">0A 01</i2c_write> <sleep ms="10"/>
    <i2c_write addr="0x67" count="1" radix="16">0A</i2c_write> <sleep ms="10"/>
    <i2c_read addr="0x67" count="1" radix="16">00</i2c_read> <sleep ms="10"/>

    </aardvark>

    Enable the termination:

    <aardvark>
    <configure i2c="1" spi="1" gpio="0" tpower="0" pullups="0"/>
    <i2c_bitrate khz="100"/>

    <i2c_write addr="0x67" count="2" radix="16">0A 01</i2c_write> <sleep ms="10"/>
    <i2c_write addr="0x67" count="1" radix="16">0A</i2c_write> <sleep ms="10"/>
    <i2c_read addr="0x67" count="1" radix="16">00</i2c_read> <sleep ms="10"/>

    </aardvark>

    For detailed information regarding the I2C bus and programing process please see the datasheet, section 7.2.

    Best regards,

    Diego.