topic Re: i.MX6D USB ENVADJ in i.MX Processors

i.MX6D USB ENVADJ

sugiyamatoshihi — Wed, 20 Sep 2017 14:00:07 GMT

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

Re: i.MX6D USB ENVADJ

weidong_sun — Thu, 21 Sep 2017 02:29:31 GMT

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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Re: i.MX6D USB ENVADJ

sugiyamatoshihi — Thu, 21 Sep 2017 07:17:38 GMT

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

Re: i.MX6D USB ENVADJ

sugiyamatoshihi — Tue, 03 Oct 2017 07:35:07 GMT

Hi,

Could you answer?

Best Regards,

Sugiyama