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Question, i.MX25 USB

Question asked by AVNET JAPAN FAE (team share account) on Oct 3, 2014
Latest reply on Oct 27, 2014 by gusarambula

Hi team,

 

My customer is working on the circuitry design for their own i.MX25 board.

They have the questions on the connection of USB VBUS.

(1)

In the schematic of i.MX25PDK, it seems that USBPHY1_VBUS pad(K17) of i.MX25 is connected to 5V VBUS.

Is the voltage level of USBPHY1_VBUS 3.3V?

If so, is it alright to connect USBPHY1_VBUS pad to 5V VBUS?

(2)

In the schema of i.MX25PDK, the customer believes that USBH2_PWR is ‘High active’ and USBOTG_PWR is ‘Low active’.

Is it possible to configure the polarity(High active/Low active) of those pins?

 

Thanks,

Miyamoto

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