> And by running off XTAL, the consumption grows so dramatically? No, switching on the PLL does.
And the PLL can use either the external XTAL or the internal ring- oscillator as a reference. The external XTAL is very accurate, but uses power. The ring-oscillator is not very accurate, but very energy efficient. On the EVK, the external XTAL cannot be powered down separately, so if it's consuming power anyway, there\s not reason not to use it over the ring-oscillator. But a more generic design may want use ring-oscillator initially. _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
