WORKING: LPC43xx running at 204MHz with SDRAM

Discussion created by lpcware Employee on Jun 15, 2016
Content originally posted in LPCWare by rgledhill on Tue Jun 18 00:32:31 MST 2013

Hi everyone,

There are many posts on here about the problems getting an external SDRAM working properly when the processor is running at 204MHz.  Well, we have found a configuration that works!

I've attached it here for people to try; let me know how you get on.

By the way if you use the NXP driver for the RTC, you will find that RTC_Init() very helpfull reconfigures one of the SDRAM lines to be a 32.768kHz CLKOUT, which obviously stops the SDRAM working.  I've attached a corrected version.  Note this is based on the CMSIS driver pack from the repository - it might already be fixed in the LPCOpen distribution, I haven't looked.



Hitex (UK) Ltd

Original Attachment has been moved to: lpc43xx_rtc.c.zip

Original Attachment has been moved to: system_LPC43xx_0.c.zip