> 1 | Overview

> The firmware of the Siemens wireless modules is stored in a Flash memory. To meet the requirements of different application design strategies firmware updates can be downloaded via the interfaces ASC0, ASC1 and USB.
> For each product, firmware updates are made available as a binary file *.usf and as an executable program named gWinSwup:

> • | The binary file is intended for download through the host application or a dedicated program developed by the customer for any operating system, referred to as generic update.

> • | The executable program integrates the *.usf binary file and is ready for use on systems running Windows XP, Windows Vista or Windows 2000.

> Note: Products with SPI interface, such as AC65 Module, AC75 Module, TC65 Module, TC65 Terminal, XT65 Module and XT75 Module also support upgrading firmware over the air. For details please refer to the “Application Note 17: Firmware Update Over the Air”.