i.MX6D USB ENVADJ

[sugiyamatoshihi]

Hi, 

I'd like to know the tolerance of ENVADJ voltage. Also, what is voltage source of ENVADJ?

The ENVADJ field adjusts the trip point for the envelope detector.
000 = Trip-Level Voltage is 0.12500 V
001 = Trip-Level Voltage is 0.10000 V
010 = Trip-Level Voltage is 0.13750 V
011 = Trip-Level Voltage is 0.15000 V
1XX = Reserved

Best Regards,

Sugiyama

[weidong_sun]

Hello Toshishisa,

    The voltage setting is used to set the trip point for the envelope detector, and evelope detector will determine if the current usb signal on differential line is valid  according to the voltage.

Have a great day,
TIC  weidong sun

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[sugiyamatoshihi]

Hi, weidong sun,

Thank you for the answer.

However, I'd like to know below items of ENVADJ voltage.

1. How this voltage generate in circuit?  From USB LDO?

2. How much the voltage vary by each device?   When 000=125mV, does the voltage vary +/-5mV?

3. How much the voltage vary depend on temperature?  About 35degC, the voltage seems minimum.

Best Regards,

Sugiyama

[sugiyamatoshihi]

Hi, 

Could you answer?

Best Regards,

Sugiyama