About USBPHYx_TXn register in i.MX6DQ.

[keitanagashima]

Dear All,

Hello. I have a question about D_CAL and TXCAL45DP/DN in USBPHYx_TXn register.

Refer to attached file.

And, please answer to me.

I referred the below topic. But, I couldn't understand it.

Re: i.MX6 USB drive strength.

Best Regards,

Keita

[igorpadykov · Accepted solution]

HI Keita

please find attached file with answer.

Best regards

igor

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[keitanagashima]

Dear Igor,

Hello. Thank you for your quick reply.

In case of D_CAL=0000b, 1.19*17.78mA = 21.1582[mA].

But, the it was described Resistor trimming code = 0.16% in RM.

In case of D_CAL=1111b, 0.79*17.78mA = 14.0462[mA].

But, the it was described Resistor trimming code = +25% in RM.

How should I calculate it from RM?

(I didn't understand the relation of your value and RM one.)

Best Regards,

Keita

[igorpadykov]

HI Keita

these resistors are for trimming the current, as described in AN4589

I do not think that you can calculate it from RM,

I provided you info from AE team (SR-2466611351), one can

just use it.

Best regards

igor

[keitanagashima]

Dear Igor,

OK. Thank you!

Best Regards,

Keita