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Lpc2000

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injecting an external 4 MHz clk into LPC2000, and using PLL - anyone done similar ?

2004-05-08 by microbit

Hi All,
This might have come up before I think, but I can't seem to
readily find it in my LPC2000 folder.
Has anyone ever tried supplying LPC2000 with an external 4 MHz
clock signal, to be used with PLL at higher clock rates ?
Since it's a full swing Ext signal, I don't see any limitations, other
than the osc buffer ckty, which surely should handle that.
I'm thinking of multiplying up to 64 MHz cclk.. a tad too high.
And 8 X = 32 MHz is too low.
This is for LPC2119/29.
Space is critical and I need to save an SMT Xtal real estate wise.
-- Kris

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