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GRTz U11 pin 18 reset timing is insufficient #25

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@rkuester

On rev1, the U11 pin 18 GRTz reset pin is required by datasheet section 8.3.7 to be held for a minimum of 3ms after the U11 power inputs are stable. The step response of the current RC, 10k ohm * 100nF = 1ms, reaches the V_IH threshold (section 7.5) of 2V in less than 1 RC (3.3V * 0.63 = 2.08V), well under the required 3ms.

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