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default frequency of lpc2138


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siri

Tue Jun 23 2009, 12:59AM

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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

Ajay Bhargav

Thu Jun 25 2009, 03:46AM

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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.

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siri

Thu Jun 25 2009, 03:56AM

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Joined: Wed Nov 05 2008, 01:18AM

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thank you its working


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