Verifying Frequency of LPC4357

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Verifying Frequency of LPC4357

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lpcware
NXP Employee
NXP Employee
Content originally posted in LPCWare by Sal Ammoniac on Tue Mar 24 19:17:47 MST 2015
The LPC4357 has a somewhat complicated clock generation and distribution system. Is there a straightforward way to determine if the CPU is actually running at 204 MHz? I think I have all of the clock CGU/CCU registers programmed correctly for 204 MHz, but I'd like an independent way to verify it's actually running at that speed.
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lpcware
NXP Employee
NXP Employee
Content originally posted in LPCWare by mc on Tue Mar 24 20:33:00 MST 2015
Hi Sal,
You can divide PLL out(Core Clock) by two and send it to CLKOUT pin for measurement.
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