1 PIC32CX-BZ Family System Services

The PIC32CX-BZ System services provides several services to protocol developers and application users which use PIC32CX-BZ products.
- 1.1 PIC32CX-BZ2 System Services
- 1.2 PIC32CX-BZ3 System Services
  - 1.2.1 PIC32CX-BZ3 Secure Boot ROM Help
  - 1.2.2 PIC32CX-BZ3 Device Support Component Library Help
    The PIC32CX-BZ3 Device Support Component Library provides software API's for various subsystems in the PIC32CX-BZ3.
  - 1.2.3 PIC32CX-BZ3 Persistent Data Server Component Library Help
    The PIC32CX-BZ3 Persistent Data Server Component Library provides interface for storing and restoring items into the Non volatile memory using wear leveling mechanism
  - 1.2.4 PIC32CX-BZ3 Boot Services Help
  - 1.2.5 PIC32CX-BZ3 Standalone Bootloader Component Help
Microchip Information

1.2.5.2 DFU Functionality - Serial image bootloader

DFU, the device firmware upgrade in bootloader is used to load new image which is received from host over serial interface and writes into the internal flash or external flash. The host may be python script or pc tool.

There are two possible ways the device bootloader can be put into DFU mode

GPIO trigger DFU Mode
By holding GPIO pin/button and resetting the board helps to enter DFU mode