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benjhamltn

Junior Boarder

2008/10/13 20:46

Re:Crystal options

If you use a single-ended clock source like the EPSON TOYOCOM SG-310 SCF C - 8MHz, do you connect the output of the clock to OSC0 and leave OSC1 unconnected?

Also, can you still configure the PLL or 20Mhz operation using

SysCtlClockSet(SYSCTL_SYSDIV_10 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |SYSCTL_XTAL_8MHZ);

and for 50 Mhz operation using

SysCtlClockSet(SYSCTL_SYSDIV_4 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |SYSCTL_XTAL_8MHZ);

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rocksoft

Expert Boarder

2008/10/14 02:01

Re:Crystal options

Yes.

OSC0 for the main clock and XTALNPHY for Ethernet. All the internal clock generation is the same I believe regardless of the source.

I use the SG310 primarilty because it has a "stop" signal, I switch the Ethernet oscillator off using a digital output.

Liam.

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