OpenSprinkler › Forums › Hardware Questions › DIY Kit Assembly Questions › Not every 2.2u board is equal › Reply To: Not every 2.2u board is equal August 15, 2015 at 10:07 am #39878 RayKeymaster No, CH340 uses 12MHz and it’s a small surface mount component. ATmega644 uses 16MHz. ENC28J60 uses 25MHz.
