always @(posedge UsClk)
begin
    LastPPMIN=PPMIN;
    if ((PPMIN==1) and (LastPPMIN==0)) begin
        if (CurrentCount > 2500) begin
            CurrentCount = 0;
            ChannelSelect = 0;
        end
        else begin
            PPMreg(ChannelSelect) = CurrentCount;
            CurrentCount = 0;
            ChannelSelect = ChannelSelect + 1;
        end
    end
    else begin
        CurrentCount = CurrentCount + 1;
    end
end