9.2.4 Typical Connection Figure 9-3. Board Schematic Note: The values shown on the 22 kΩ and 15 kΩ resistors are only valid with 3.3V-supplied PIOs. CRPB: Upstream Facing Port Bypass Capacitance of 1 μF to 10 μF (refer to “DC Electrical Characteristics” in Universal Serial Bus Specification Rev. 2) 10 pF capacitor on VBG is a provision and may not be populated.