The CY3640 USB Starter Kit was designed to serve as an easily customizable platform for USB device development using the Cypress CY7C630xx/631xx family of USB controllers. The CY3640 included a fully functional USB thermometer device, a Windows 95 thermometer application, and a USB Thermometer device driver. The CY3640 kit contents are attached here. However, please note that CY7C630xx/631xx family of devices and hence the CY3640 has been obsoleted and now for Low Speed USB applications, we recommend our encoreII series of devices. The corresponding development kit for encoreII is CY3655.