TODO
====

Rev.A
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- 3.3V LDO regulator MIC5504 footprint is wrong size and should be 5 lands.
    DONE: 2015/09/28 changed footprint to SOT23-5_HSOL
- Both QFP footprint should has a clear 1pin mark.
    DONE: 2015/09/28
- Add pin markings on USB pads for cable soldering.
    DONE: 2015/09/28

Rev.B
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- X'tal foot print
- X'tal ground connection
- Capacitor value for X'tal: 18p -> 10p
- Resistor value: 2K2->1K
    ALL DONE: 2016/12/17