44.3 Block Diagram

Figure 44-1. PIC32 USB Interface Diagram
  1. Pins can be used as digital inputs when USB is not enabled.
  2. A 48 MHz clock is required for proper USB operation.
  3. Pins can be used as GPIO when the USB module is disabled.
  4. See Clock and Reset Unit (CRU) from Related Links for more details on clk generation.