JTAG Boundary Scan Test Systems (IEEE 1149.1)

High Speed Flash Programming

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High Speed Programming of Non-Volatile Memories

XJFlash

The serial nature of JTAG means that programming large flash devices can be very slow. If there is a programmable logic device (such as an FPGA) connected to the flash part, XJFlash can be used to dramatically speed up the programming process quite often reaching the maximum speed for the device.

The XJFlash module uses the internal circuitry of an onboard FPGA to create a simple flash programmer. This relieves the bandwidth restricted JTAG scan chain of repetitive tasks such as shifting in control, address and data bits. By removing traffic from the scan chain, the XJTAG system is able to achieve close to theoretical programming times for a given flash memory device.

XJDirect

Not all designs include a suitable programmable logic device, but many designs can access the flash device using the processor. XJDirect can be used to access the processor debug port and once again achieve greatly improved programming speeds.

If speed over JTAG is an issue, there are alternatives that can greatly improve programming speed, but since they are dependant on the specific application it is best to contact XJTAG to identify the best possible solution.

For further information on the XJTAG system, please contact XJTAG.

• XJDeveloper
• XJAnalyser
• XJRunner
• XJLink / XJLink2
• XJIO Boards
• PXI modules
• XJAPI
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• What people are saying...

  "The XJTAG system is an excellent and highly versatile product which has transformed the way we test complex printed circuit boards populated with BGA devices.
  
  It is easy to use, requires no training, enables rapid fault diagnosis and consistently gives us 80% test coverage across digital circuits.
  
  We can now test our boards in a matter of minutes rather than hours and we have reduced the number of more complex board faults.
  
  This is good news for customers and for our overall efficiency as these boards typically contain large and expensive chips such as FPGAs, which we do not want to hold in our inventory any longer than necessary."
  
  Simon Bayley, Technical Director, Barric Limited
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