Discussion in "ARM Development" started by    siri    Jun 23, 2009.
Tue Jun 23 2009, 01:29 pm
#1
hello,

what is the default frequency of the lpc2138, i have connected 12 mhz and compiling using keil,unable to find what is the correct frequency initailly and what should i enable for a desired frequency
Thu Jun 25 2009, 04:16 pm
#2
open startup.s and configure PLL like this



i kept my PLL settings as shown above for crystal 14.7456Mhz

for 12Mhz you keep your settings as you want. remember max frequency is 60Mhz. so select multiplier accordingly.
Thu Jun 25 2009, 04:26 pm
#3
thank you its working

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