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Regarding K61 Clocks

Question asked by Sithara Sivan on Jul 25, 2013
Latest reply on Jul 26, 2013 by Sithara Sivan

I am using MK61FN1M0VMJ12 for
my design. I need to run the processor @ 120MHz. Also using DDR2 memory and RMII
ethernet interface of the processor. Please advice on the proper clocking of the
processor.

I have seen three external oscillator connections:
1.
XTAL0/EXTAL0
2. XTAL1/EXTAL1
3. XTAL32/EXTAL32.

I have connected
a 32.768kHz crystal on the XTAL32/EXTAL32 pins for RTC operation.
What about
the two XTAL pins?
Shall i need to connect both?
What is the exact
crystal/clock value if i need DDR2 & RMII LAN in my application?

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