Switching core clock to 204MHz repeatedly causes a system crash

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by mirfan on Wed Nov 28 05:13:06 MST 2012

I am working at Mentor Graphics and hoping to add Power Management support to LPC4350. I am using a HITEX board. My demo application switches the core at different operating frequencies (12MHz,48MHz, 96MHz and 204MHz) after every 2 seconds. The issue I am facing is somewhat already known i.e. Core crashes if its clock is ramped up from below 90MHz to 204MHz. The issue does not appear every time I make a switch. Right now I get a crash after around 40 mins. During this time the core is continuously moved to all the other operating frequencies without an issue but eventually it crashes. I have also put in the work around of moving the core to 204MHz in multiple steps using the FASTBOOT example as a reference. The code is running from internal SRAM.