The software development environment and USB stack is how NXP completes and simplifies USB development. CodeWarrior Development Studio for Microcontrollers 6.1 is a single tool suite that supports software development for the Flexis JM family. The development studio combines optimized compilers, an assembler, and a graphical source level debugger to simplify development. Additionally, CodeWarrior is equipped with Processor Expert – a graphical device initialization tool. Using processor expert the device can be initialized without writing the C code. NXP provides two complimentary USB software stacks, the USB-LITE Stack by CMX and the USB-MINI Stack, to help simplify applications with USB functionality. The USB-LITE Stack by CMX provides USB host and device function which supports the 8-bit and 32-bit embedded USB controllers. For JM60, the USB-LITE Stack by CMX supports Human Interface Device (HID) class in device mode and Communication Device Class (CDC) to UART in device mode. For JM128, it supports HID class in host and device mode, and mass storage function in host mode. The USB-MINI Stack is highly optimized for the smallest foot print HID class and enables an embedded USB Bootloader function. For JM60, the USB-MINI Stack supports HID class and some general applications, such as USB to SCI/SPI/IIC Bridge, USB Datalogger, and USB protocol sniffers.