topic 5329EVB, new LTIB and 3 serial ports - USB problems? in ColdFire/68K Microcontrollers and Processors https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/5329EVB-new-LTIB-and-3-serial-ports-USB-problems/m-p/177350#M7038 <HTML><HEAD></HEAD><BODY><SPAN>When I boot the 5329EVB with the latest LTIB, I notice that all three UARTS are recognized.</SPAN><BR /><BR /><SPAN>My memory is a bit fuzzy, but when I tried enabling that third port (ages ago), I found that one of the third port UART signals (TX or RX) was also being used to control something on the USB port, and so USB operation became unreliable.&nbsp; USB worked sometimes on one EVB, but not on another.&nbsp; As I recall, the problem went all the way back to the SOM module, so there was little hope of fixing it if I wanted to use the SOM.&nbsp;</SPAN><BR /><BR /><SPAN>Did someone find a way around the problem?&nbsp; Or could someone at Freescale have made the same mistake I did, and that's why I'm having USB problems again?</SPAN><BR /><BR /><SPAN>John</SPAN><BR /><DIV> </DIV></BODY></HTML> Sun, 06 Jan 2008 05:59:39 GMT jpa 2008-01-06T05:59:39Z 5329EVB, new LTIB and 3 serial ports - USB problems? https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/5329EVB-new-LTIB-and-3-serial-ports-USB-problems/m-p/177350#M7038 <HTML><HEAD></HEAD><BODY><SPAN>When I boot the 5329EVB with the latest LTIB, I notice that all three UARTS are recognized.</SPAN><BR /><BR /><SPAN>My memory is a bit fuzzy, but when I tried enabling that third port (ages ago), I found that one of the third port UART signals (TX or RX) was also being used to control something on the USB port, and so USB operation became unreliable.&nbsp; USB worked sometimes on one EVB, but not on another.&nbsp; As I recall, the problem went all the way back to the SOM module, so there was little hope of fixing it if I wanted to use the SOM.&nbsp;</SPAN><BR /><BR /><SPAN>Did someone find a way around the problem?&nbsp; Or could someone at Freescale have made the same mistake I did, and that's why I'm having USB problems again?</SPAN><BR /><BR /><SPAN>John</SPAN><BR /><DIV> </DIV></BODY></HTML> Sun, 06 Jan 2008 05:59:39 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/5329EVB-new-LTIB-and-3-serial-ports-USB-problems/m-p/177350#M7038 jpa 2008-01-06T05:59:39Z Re: 5329EVB, new LTIB and 3 serial ports - USB problems? https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/5329EVB-new-LTIB-and-3-serial-ports-USB-problems/m-p/177351#M7039 <HTML><HEAD></HEAD><BODY>I went back through my notes from the time I was working on the third UART...I was trying to enable the third port while keeping CAN and USB capabilities.&nbsp; I wasn't able to get that working because one of the pins - mapped to MFP09 - is used as an OE for a buffer on the SOM.&nbsp;<BR /><BR />It's possible the third port is being mapped through the CANRX/TX multifunction pins.<BR /><BR />Still trying to get my USB flash stick recognized.&nbsp;<BR /><BR />John<BR /><DIV></DIV></BODY></HTML> Mon, 07 Jan 2008 23:15:32 GMT https://community.nxp.com/t5/ColdFire-68K-Microcontrollers/5329EVB-new-LTIB-and-3-serial-ports-USB-problems/m-p/177351#M7039 jpa 2008-01-07T23:15:32Z