lpcware

Using CLKOUT for Diagnostic Purposes

Discussion created by lpcware Employee on Jun 15, 2016
Latest reply on Jun 15, 2016 by lpcware
Content originally posted in LPCWare by gregd on Tue Nov 13 11:02:16 MST 2012
The manual recommends using the CLKOUT signal to calibrate the RTC.  It is also useful for checking the frequency of all the clock outputs.  I am using 32-bit SDRAM in my design and it seems like you have to configure CLK0..CLK3 all four for EMC_CLKx in order for the SDRAM to function properly.  The only other spot that CLKOUT is brought out to is the M11 pin (LBGA256) which is used for ENET_TX_CLK on my board.  Is there any other way that you can get to the CLKOUT signal for use in RTC calibration and other diagnostics?

Thanks,
Greg Dunn

Outcomes