Hello Jim, I think the ringing on the rising edge is may be because I'm using passive probes with the oscilloscope. The /Reset pin status is floating, its just connect to a connector M but there is no logic on it because connector is open and not connected to another device. Today I have tried to run the chip on 2MHz frequency and when I read the register for PLL lock it shows me locked for a while and then again it showed unlock on the same frequency in two consecutive read commands in a loop (see the images). As you can see in the First image PLL lock and Registers lock bits are high (Bit 7 and Bit 0) but in the Second image PLL is LOW again and only Lock bit is high. This happens only once I don't know what causing the PLL lock bit 0.
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