Quantity   Component name
1 × ATSAMD21G17-AU 32bit microcontroller TQFP48
1 × LD117AS33TR LOW DROP FIXED POSITIVE VOLTAGE REGULATORS 1A
1 × MINI-USB-SHIELD-UX60-MB-5ST MINI USB Connector
1 × 12.000M HZ Crystal
1 × USBLC6-2 Very low capacitance ESD protection