Dear All,
On custom board, VDDUSB_CAP connected 10uF and 0.1uF capacitors.
(On SABRE-SD, VDDUSB_CAP connected 10uF [C627] and 0.22uF [C633] capacitors.)
Because the discharge time of VDD_USB_CAP is too late, there is possibility of remaining the 0.6V voltage at the next Power ON.
Is there a problem in this voltage (0.6V)?
If the voltage cause the problem, could you tell me the workaround?
Best Regards,
Keita
Solved! Go to Solution.
Hi Keita
there is no problem in this voltage since it produced from
USB_OTG_VBUS (or USB_H1_VBUS) and they are not part
of the power supply sequence and can be powered at any time,
as stated in sect.4.2.1 Power-Up Sequence i.MX6DQ Datasheet (rev.4, 7/2015)
http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf
Best regards
igor
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Hi Keita
there is no problem in this voltage since it produced from
USB_OTG_VBUS (or USB_H1_VBUS) and they are not part
of the power supply sequence and can be powered at any time,
as stated in sect.4.2.1 Power-Up Sequence i.MX6DQ Datasheet (rev.4, 7/2015)
http://cache.freescale.com/files/32bit/doc/data_sheet/IMX6DQCEC.pdf
Best regards
igor
-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
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Dear Igor,
Hello.
Thank you for your quick reply.
OK. I got it.
Best Regards,
Keita