Is a Windows driver available for BL620-US?

The BL620-US dongle has a Segger J-Link chip on board; when you connect the dongle to your computer, it searches for the relevant driver which can be obtained from https://www.segger.com/downloads/jlink/. You will need the serial number printed on the underside of your dongle next to the text SEGGER # to be able to download the driver from the Segger website. Please reference the BL620 Quick Start Guide for additional information about installing the dongle. As of the writing of this document the J-Link Drivers could be located here.