Development Boards such as the ML605, SP605 and SP601 use a mini-B USB cable to connect the USB UART port on the board to a PC. If the driver for this CP210x USB to UART bridge is not automatically recognized, this can be found and downloaded from two locations:
1. On the Silicon Labs Website:
https://www.silabs.com/Pages/default.aspxYou can find the appropriate drivers on the Silicon Labs Website by searching for "VCP drivers CP210x".
2. Alternatively, typing "VCP drivers CP210x" into any Internet search engine should bring you to the appropriate driver files.