topic UART after Deep Sleep Wake Up (LPC1114) in LPCXpresso IDE https://community.nxp.com/t5/LPCXpresso-IDE/UART-after-Deep-Sleep-Wake-Up-LPC1114/m-p/526597#M7 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by shashankiim on Mon Jun 24 01:11:50 MST 2013</STRONG><BR /><SPAN>Hey Guys</SPAN><BR /><BR /><SPAN>I have been working with the power down modes of LPC1114 (302).</SPAN><BR /><BR /><SPAN>The system runs on IRC connected to PLL at the frequency of 48MHz.</SPAN><BR /><SPAN>I configured a pin as wakeup source. While putting the microcontroller in deep sleep mode I power down all the oscillators and peripherals available in PDRUNCFG.</SPAN><BR /><BR /><SPAN>When the system wakes up by the external interrupt, the LED glows as expected however on the UART instead of the original data I get random data. Adding a delay after the wake up, gives initial characters as correct rest all as dots or garbage.</SPAN><BR /><BR /><SPAN>Even after re configuring the UART after wake up the same issue persists. What can be the issue?</SPAN><BR /><SPAN>What is the correct way to wake up ?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Any pointers would be really appreciated.</SPAN><BR /><BR /><BR /><SPAN>Rgds</SPAN></BODY></HTML> Thu, 16 Jun 2016 01:34:11 GMT lpcware 2016-06-16T01:34:11Z UART after Deep Sleep Wake Up (LPC1114) https://community.nxp.com/t5/LPCXpresso-IDE/UART-after-Deep-Sleep-Wake-Up-LPC1114/m-p/526597#M7 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by shashankiim on Mon Jun 24 01:11:50 MST 2013</STRONG><BR /><SPAN>Hey Guys</SPAN><BR /><BR /><SPAN>I have been working with the power down modes of LPC1114 (302).</SPAN><BR /><BR /><SPAN>The system runs on IRC connected to PLL at the frequency of 48MHz.</SPAN><BR /><SPAN>I configured a pin as wakeup source. While putting the microcontroller in deep sleep mode I power down all the oscillators and peripherals available in PDRUNCFG.</SPAN><BR /><BR /><SPAN>When the system wakes up by the external interrupt, the LED glows as expected however on the UART instead of the original data I get random data. Adding a delay after the wake up, gives initial characters as correct rest all as dots or garbage.</SPAN><BR /><BR /><SPAN>Even after re configuring the UART after wake up the same issue persists. What can be the issue?</SPAN><BR /><SPAN>What is the correct way to wake up ?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>Any pointers would be really appreciated.</SPAN><BR /><BR /><BR /><SPAN>Rgds</SPAN></BODY></HTML> Thu, 16 Jun 2016 01:34:11 GMT https://community.nxp.com/t5/LPCXpresso-IDE/UART-after-Deep-Sleep-Wake-Up-LPC1114/m-p/526597#M7 lpcware 2016-06-16T01:34:11Z