topic Re: LPC1837 USART in LPC Microcontrollers https://community.nxp.com/t5/LPC-Microcontrollers/LPC1837-USART/m-p/541018#M12194 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by xianghuiwang on Thu Apr 17 17:08:08 MST 2014</STRONG><BR /><SPAN>Hi, taz9557,</SPAN><BR /><BR /><SPAN>Can you check is you run into the following limitation?</SPAN><BR /><BR /><SPAN>If the fractional divider is active (DIVADDVAL &gt; 0) and DLM = 0, the value of the DLL register must be 3 or greater.</SPAN><BR /><BR /><SPAN>This is a direction quote from the user manual.</SPAN><BR /><BR /><SPAN>In general, over 3Mbits is no problem, but no all the desired rates are available.</SPAN><BR /><BR /><SPAN>regards,</SPAN><BR /><BR /></BODY></HTML> Wed, 15 Jun 2016 18:23:55 GMT lpcware 2016-06-15T18:23:55Z LPC1837 USART https://community.nxp.com/t5/LPC-Microcontrollers/LPC1837-USART/m-p/541017#M12193 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by taz9557 on Wed Apr 02 13:22:29 MST 2014</STRONG><BR /><SPAN>Hi</SPAN><BR /><SPAN>I’m using LPC1837 running at 180MHz in my project, I need to use USART2,3 as high speed half duplex RS485 (baud rate = 6Mbits). I’ve configured my hardware and got it running up to 3Mbits without any problem but any speed above this receives incorrect characters in without any framing errors. i.e. if I transmit 0x55 I receive 0x5B. Has anyone come across this problem or has anyone got a suggestion.</SPAN><BR /><SPAN>Your help be most appreciated. Thanks</SPAN><BR /></BODY></HTML> Wed, 15 Jun 2016 18:23:54 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1837-USART/m-p/541017#M12193 lpcware 2016-06-15T18:23:54Z Re: LPC1837 USART https://community.nxp.com/t5/LPC-Microcontrollers/LPC1837-USART/m-p/541018#M12194 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by xianghuiwang on Thu Apr 17 17:08:08 MST 2014</STRONG><BR /><SPAN>Hi, taz9557,</SPAN><BR /><BR /><SPAN>Can you check is you run into the following limitation?</SPAN><BR /><BR /><SPAN>If the fractional divider is active (DIVADDVAL &gt; 0) and DLM = 0, the value of the DLL register must be 3 or greater.</SPAN><BR /><BR /><SPAN>This is a direction quote from the user manual.</SPAN><BR /><BR /><SPAN>In general, over 3Mbits is no problem, but no all the desired rates are available.</SPAN><BR /><BR /><SPAN>regards,</SPAN><BR /><BR /></BODY></HTML> Wed, 15 Jun 2016 18:23:55 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC1837-USART/m-p/541018#M12194 lpcware 2016-06-15T18:23:55Z