On Tue, 28 Feb 2006, Nori, Soma Sekhar wrote:
> > During my try, after changing the PLL Freq, the board is stops
> > running. I feel, it is due to change in SDRAM Refresh rate. Is it
> > right ?? Any body tried this, Kindly share exprience with me. Like
> > how to reprogram the peripherals with-out affecting the operation
> > etc..
> Changing the PLL feeding only to the MIPS should not freeze the
> board. You are likely messing with PLL which feeds the peripherals
> as well.
No. PLL-A (Low Freq) is feeding to peripherals and PLL-B(High Feeq)
is feeding the MIPS. To save power, I switch from PLL-B to PLL-A
during run-time. After wirte in to PLL-Reg the MIPS Hangs. No reboot.
> Changing the PLL which feeds the SDRAM will also likely cause memory
> corruption. Try putting the SDRAM in self-refresh for the duration
> of PLL stablization and then re-program the SDRAM refresh rate.
I didn't tried this Self-Refresh trick, Let me try ...
Kindly CC to me.