My BL600 DVK board won't respond for a firmware upgrade. What's wrong?

For full firmware upgrade instructions, please refer to one of the following firmware upgrade application notes:

Development Kit Firmware Upgrade Guide

Upgrading BL600 Firmware over UART

Please note that a common error is failing to prepare the board to the required settings.  Before a firmware upgrade, you should ensure the positions of the three power switches at the bottom-left of the board are set correctly:

SW4 must be set to "USB"

SW5 must be set to "3V3"

SW6 must be set to "3V3 / 1V8"