i.MX ProcessorsのトピックiMX6UL USB over current https://community.nxp.com/t5/i-MX-Processors/iMX6UL-USB-over-current/m-p/662015#M101642 <HTML><HEAD></HEAD><BODY><P>Using the iMX6UL as a USB host controller, with an external power switch with over current status.</P><P>If I wire the OC status to a iMX6UL OC pin (as described in table 54-1 of the iMX6UL Reference Manual). Will there be any HW dependencies when a OC situation occurs:</P><P>1: Activating the OC input, will the USB data transfer be interrupted?</P><P>2: Will the OC input by any means directly control the PWR output?</P><P>I am thinking of any HW links between functions of the USB block.</P><P>A lot of reference designs are using any other GPIO pin for OC status, which I assume requires the USB driver to be adapted to that. But as the Reference Manual lists a number of dedicated pins for OC status, I'm wondering if the on-chip HW has any functionality for handling OC situations.</P></BODY></HTML> Tue, 15 Nov 2016 09:23:43 GMT hansjpetersen 2016-11-15T09:23:43Z iMX6UL USB over current https://community.nxp.com/t5/i-MX-Processors/iMX6UL-USB-over-current/m-p/662015#M101642 <HTML><HEAD></HEAD><BODY><P>Using the iMX6UL as a USB host controller, with an external power switch with over current status.</P><P>If I wire the OC status to a iMX6UL OC pin (as described in table 54-1 of the iMX6UL Reference Manual). Will there be any HW dependencies when a OC situation occurs:</P><P>1: Activating the OC input, will the USB data transfer be interrupted?</P><P>2: Will the OC input by any means directly control the PWR output?</P><P>I am thinking of any HW links between functions of the USB block.</P><P>A lot of reference designs are using any other GPIO pin for OC status, which I assume requires the USB driver to be adapted to that. But as the Reference Manual lists a number of dedicated pins for OC status, I'm wondering if the on-chip HW has any functionality for handling OC situations.</P></BODY></HTML> Tue, 15 Nov 2016 09:23:43 GMT https://community.nxp.com/t5/i-MX-Processors/iMX6UL-USB-over-current/m-p/662015#M101642 hansjpetersen 2016-11-15T09:23:43Z Re: iMX6UL USB over current https://community.nxp.com/t5/i-MX-Processors/iMX6UL-USB-over-current/m-p/662016#M101643 <HTML><HEAD></HEAD><BODY><P>Hi Hans,</P><P></P><P>There is no hardware dependency that I'm aware of, this is all software controlled, behaviour is programmable to a certain extent, an interrupt can be generated when an OC is detected, what happens next is software controlled.</P><P></P><P>Refer to the RM Port Reporting Over-Current section for more details, if searching through the RM USB chapters, use "current" as the search term to help avoid missing any OC associated information.</P><P></P><P>Regards</P><P>Ross</P></BODY></HTML> Tue, 15 Nov 2016 11:49:18 GMT https://community.nxp.com/t5/i-MX-Processors/iMX6UL-USB-over-current/m-p/662016#M101643 RossMcLuckie 2016-11-15T11:49:18Z