Bus Blaster v4 is an experimental, high-speed JTAG debugger from Dangerous Prototypes.Thanks to a reprogrammable buffer, a simple update over USB makes Bus Blaster compatible with many different JTAG debugger types in the most popular open source software.Based on FT2232H with high-speed USB 2.0Buffered interface works with 3.3volt to 1.8volt targetsReprogrammable buffer is compatible with multiple debugger typesCompatible with 'jtagkey', 'KT-link' programmer settings in OpenOCD, urJTAG, and moreships with JTAGkey compatible buffer image pre-programmedShould support Serial Wire Debug when availableMini-CPLD development board: self programmable, extra CPLD pins to headerOpen source (CC-BY-SA)Bus Blaster ManualBus Blaster design overviewBus Blaster forumCPLD buffer logic overviewV4 uses a larger CPLD than previous versions. It can now support the SWV feature of Cortex microcontroller for advance debugging when software support is availableŸSWV is little used and not currently supported in software, most users will be better off with Bus Blaster v3 available hereFitted in a DP9056 (90x56 mm) standard PCBAdded series resistors to input and output pins to protect against damage and noiseUpdates in v4:Each unit is tested before it ships.This open source hardware and software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.TechsupportThis product is designed by Dangerous, If you encounter any problems when using this product, please request technical support in the forum.