Content originally posted in LPCWare by shashankiim on Mon Jun 24 01:11:50 MST 2013
Hey Guys
I have been working with the power down modes of LPC1114 (302).
The system runs on IRC connected to PLL at the frequency of 48MHz.
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.
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.
Even after re configuring the UART after wake up the same issue persists. What can be the issue?
What is the correct way to wake up ?
Any pointers would be really appreciated.
Rgds
