Freescale supplies certain development boards with an integrated debug circuit based on OpenSDA. This allows the development board to be debugged from the PC via the USB bus without requiring external debug hardware, such as the Cyclone or USB Multilink Universal. The development board also derives its power from the USB Bus.
The OpenSDA circuit design is incorporated into many of Freescale's tower cards. The main processor is pre-programmed with a Bootloader. The Bootloader can be used to load P&E's OpenSDA Debug Application, which is shipped with the board. It can also be downloaded from http://www.pemicro.com/opensda.
Integration with CodeWarrior is handled via the "OpenSDA" connection. The OpenSDA Connection setting permits a connection to OpenSDA devices. OpenSDA mode lets you debug code, as the firmware is fully resident in the Flash or RAM of the microprocessor.