Quick Start

This guide introduces the FoBE Breakout CMSIS-DAP Lite and how to use it.

Hardware diagram

The following figure illustrates the FoBE Breakout CMSIS-DAP Lite hardware diagram.

Mechanical dimensions

FoBE Breakout CMSIS-DAP Lite is a single-sided 25.4mm x 25.4mm (1" x 1") 1.6mm thick PCB with a USB-C connector and a set of 12-pin 2.54mm header. Features two buttons for reset and bootloader mode, and a DAP-LED for status indication. Fixing by 4 x 1.6mm Screw holes.

Interfaces

The module provides a 12-pin 2.54mm header interface for connection to target boards.

Pin	Signal	Features
1	VCP_RXD	Virtual COM Port Receive (RX)
2	VCP_TXD	Virtual COM Port Transmit (TX)
3	3V3	Power output: 3.3V
4	5V	Power output: 5V
5	GND	Ground
6	SWRST	Software Reset
7	JTAG_TMS	JTAG Test Mode Select
8	JTAG_TDO	JTAG Test Data Output
9	JTAG_TDI	JTAG Test Data Input
10	JTAG_TCK	JTAG Test Clock
11	—	Reserved
12	—	Reserved

Usage Example

Connection with FoBE Quill nRF52840 Mesh

Connect the FoBE Breakout CMSIS-DAP Lite to the FoBE Quill nRF52840 Mesh using the provided Dupont wires.

Setup Instructions

1. Hardware Connection

   • Connect the CMSIS-DAP Lite to your target board using the 12-pin header
   • Ensure proper power supply connections (3.3V or 5V as required)
   • Connect SWD signals: SWCLK, SWDIO, and SWRST
   • Connect USB-C cable to your development computer

2. Software Setup

   • Install your preferred IDE (Keil MDK, IAR, or OpenOCD)
   • Configure the debugger to use CMSIS-DAP interface
   • Select the appropriate target device in your IDE
   • Start debugging or programming your target device

3. Status Indicators

   • DAP-LED indicates the current operation status
   • Use RESET button to reset the target device
   • Use BOOT button to enter bootloader mode for firmware updates

note

• Ensure proper power supply compatibility between the debugger and target board
• Use appropriate voltage levels (3.3V or 5V) for your target device
• The virtual serial port can be used for debugging output and communication