In-system flash programming 1,000x faster via IJTAG explained in new eBook
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In-system flash programming 1,000x faster via IJTAG explained in new eBook

Jul 28, 2015 -- New faster methods for the in-system programming of onboard flash as well as I2C and SPI memory are explained in a new eBook published by ASSET InterTech ( In-system programming has many advantages over standalone programming stations, but, until now, its programming speed has presented a challenge for design and production engineers. Advanced programming methods based on the IEEE 1687 Internal JTAG (IJTAG) standard and embedded programming engines in an onboard FPGA can accelerate programming speeds by a factor of 1,000, shortening the process from tens of minutes to a second or less.

“In many cases, the contents of FPGA-connected flash is not available when prototypes of a board design are produced. And production engineers often don’t know what version of the firmware to load until a customer orders a system,” said Kent Zetterberg, author of the eBook and an ASSET product manager. “In cases like this, in-system programming is the best solution. Faster programming speeds make it even more effective.”

Previously, in-system programming which utilized the IEEE 1149.1 JTAG port on the FPGA required that every memory write operation traverse the FPGA’s entire scan chain. The new IJTAG standard can embed a dynamically reconfigurable network of embedded instruments and at-speed programming engines into FPGAs, systems-on-a-chip (SoC) and other types of devices. Since the IJTAG network is reconfigurable, the in-system programming process can take a shortcut through the FPGA’s JTAG scan chain to reduce programming times significantly.

Entitled “Faster Flash Programming via FPGA and IJTAG,” the new eBook is free and available for downloading from the ASSET website’s eResources center at:

Other informative eBooks, white papers and videos on issues relating to chip, board and system debug, validation and test can also be found in the eResources Center. ( )

About ASSET InterTech

ASSET InterTech ( is a leading supplier of tools to debug, validate and test software and hardware. The company’s SourcePoint™ software debug and trace platform and ScanWorks® platform for embedded instruments work in tandem to give engineers real insight from code to silicon. SourcePoint is a best-in-class, powerful debugger that includes advanced trace tools to gather data from code and quickly debug complex embedded software systems. ScanWorks controls instruments embedded in chips to test and validate chips and circuit boards. Together they empower engineers with tools and technology for the entire life-cycle of a system, beginning with software and hardware development, on to design validation, through software/hardware integration, and eventually testing the product in manufacturing and field service. ASSET InterTech is located at 2201 North Central Expressway, Suite 105, Richardson, TX 75080.

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