I am using Nirtogen6x board. When i switch the CPU frequency from 100MHz(from PLL1) to 3MHz(PLL1 bypass, OSC_24MHz clock), it takes almost takes 1.5 seconds (0.5 seconds extra, losses 500 ticks). But after switching to 3 MHz it works fine. where as when i switch from 100MHz(from PLL1) to 24MHz(PLL1 bypass, OSC_24 MHz clock) it takes 1 second which is the right case. I just have the question if the CPU can work fine at minimmum frequency of 3MHz ? Any help would be appreciated, kind of stuck now.