> 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. Peripherals like UART calculate the baud-rate dividers based on the input frequency. If that changes, the peripheral should be re-initialized. 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. Thanks, Sekhar Nori.
