3.5 PICkit On-Board 4 (PKOB4) and Debugger/Programmer Selection

The WBZ451HPE Curiosity Board includes an integrated programmer and debugger MPLAB® PICkit™ On-Board 4 (PKOB4). This new generation of In-Circuit Debugger, requires no additional programming/debugging tool to get started.

Features and capabilities of PKOB4:

Connects to a computer through high-speed USB 2.0 (480 Mbits/s) cable
Programs the device using MPLAB X IDE or MPLAB IPE
Supports multiple hardware and software breakpoints, stopwatch and source code file debugging
Debugs the application in real time
Sets breakpoints based on the internal events
Monitors the internal file registers
Debugs at full speed
Configures the pin drivers
Field-upgradeable through an MPLAB X IDE firmware download
Indicates debugger status through on-board LEDs, demonstrating the development board’s functionality and features

The PKOB4 on the WBZ451HPE Curiosity Board provides support for programming and debugging of the target device (WBZ451HPE module) through the USB Type-C™ connector (J7) from the Host PC.

Note:

As the WBZ451HPE module supports the UART interface, the WBZ451HPE Curiosity Board employs a USB-UART Virtual COM Port instead of the standard PKOB4 Virtual COM Port. The on-board MCP2200 (U18) acts as a USB to the UART converter with hardware flow control support.
The data gateway interface feature of PKOB4 is not used in the WBZ451HPE Curiosity Board.

By default, the on-board debugger (PKOB4) is connected to the programming pins (SWDIO and SWDCLK) of the WBZ451HPE module.

The voltage level translators are provided on signals between the PKOB4 and WBZ451HPE module for supporting target voltage from 1.9-3.6V.

Two PKOB4 LEDs indicate:

Green (D1) – ACTIVE indicator
Yellow (D2) – STATUS indicator

In addition, the Curiosity Board supports external debuggers, such as MPLAB ICD5 by connecting to the Debug Connector (J36).

The WBZ451HPE programming/debugging through PKOB4 and external debugger is supported at the target voltage of 3V and at room temperature. For more details, refer to the PIC32CX-BZ2 Family Silicon Errata Sheet (DS80001043).

The Debug Connector (J36) follows the standard ARM® SWD 10 pinout. For more details on the debug header schematics, refer to Figure 5-22. MPLAB ICD5 can be connected to the Debug (DBG) header using the Debugger Adapter Board (AC102015). For more details, refer to www.microchip.com/DevelopmentTools/ProductDetails/AC102015.

Table 3-4. SWD Debug Connector Details
Pin Number of DBG Header	Pin Name	Description
1	VCC	WBZ451HPE, also for other instances of RF module power supply
2	SWDIO	PB9, SWD programming data
3	GND	Ground
4	SWCLK	PB8, SWD programming clock
5	GND	Ground
6	SWO	PB7, optional trace output
7	NC	No connection
8	NC	No connection
9	GND	Ground
10	RESET	RF module’s Reset NMCLR pin