add micro-USB connector

connector/usb-micro-b-2.0_xkb_u254-051n.yaml

@@ -0,0 +1,53 @@
+name: USB_2_MICRO-B_XKB_U254-051N
+description: USB 2.0 micro receptacle, type B, SMT
+datasheet: https://datasheet.lcsc.com/lcsc/2107141638_XKB-Connectivity-U254-051N-4BH806_C319170.pdf
+keywords: connector, usb
+
+pinout:
+  USB:
+    VBUS: 1
+    D-: 2
+    D+: 3
+    ID: 4
+    GND: 5
+  SHELL: 6, 7, 8, 9
+
+properties:
+  power: VBUS
+  ground: GND
+  bidir: D-, D+
+  in: ID
+  passive: SHELL
+
+schematic:
+  symbol: connector
+  right: USB
+  bottom: SHELL
+
+housing:
+  pattern: custom
+  bodyWidth: 8.0
+  bodyLength: 6.6
+  bodyPosition: 0, 1.58 # use holes line as center 6.6/2 - (0.8/2 + 3.45 - 2.13)
+  height: 3.0
+  silkscreen: M -3.7 1.7 3.7 1.7 # PCB edge 7.4/2, 2.13+1.15-1.58
+
+  # USB pins
+  padWidth: 0.4
+  padHeight: 1.4
+  pitch: 0.65
+  rowCount: 1
+  columnCount: 5
+  rowDX: 0
+  rowDY: -0.820 # 2.13-3.65+1.4/2
+
+  # shell mounting tabs
+  slotWidth1: 0.45
+  slotHeight1: 1.25
+  padWidth1: 1.05
+  padHeight1: 1.85
+  padPosition1: -3.575, -1.52, 3.575, -1.52, -3.575, 2.13, 3.575, 2.13 # 7.15/2, 2.13-3.65
+
+  # position holes 
+  holeDiameter2: 0.65
+  padPosition2: -2.0, 0 , 2.0, 0