#Diptrace external pins software#Thankfully, a good piece of design software with built-in rules checks can prevent this mistake. If you do make these swaps in your layout, redesigns will be required on other of the circuit board. For example, ground and I/O pins, power and I/O pins, or power and ground pins should not be swapped with each other. Current devices can have over 1500 pins, and performing a pin swap manually can be time-consuming and is prone to mistakes.Ĭertain FPGA pins cannot be swapped without also swapping other components on the circuit board. The pins have to be connected to the proper net that will connect it to other components on the PCB. On the FPGA side, the pins are assigned to the hardware description language signals that form the logic implemented in the FPGA. The challenge to integrating an FPGA on your PCB successfully is in routing your power, ground, configuration, clock, and user I/O signals properly.Ĭonnecting the right traces to an FPGA on a PCB can be a difficult task. Rather than designing a system with hundreds or even thousands of logic ICs, FPGAs provide the same design freedom in a single IC. Using FPGA technology allows designers to implement nearly any logic-based functionality in their device. The trend towards system-on-a-chip devices has increased the use of FPGAs. But in devices that have components with high pin density, like FPGAs or microcontrollers, routing your signals can quickly become a complicated mess of crisscrossing connections in your PCB layout. Pin swapping may not be so important in simpler designs with a low number of components. If you find that your design is a rat’s nest, it can be cleaned up by doing a pin swap in your PCB. Moving between schematic and layout leaves room for ambiguity, and it is up to the to route traces such that crossover is minimized. No matter how much planning goes into your PCB designs, you may find yourself in the position of your pin swap during trace routing. If you are routing traces between an FPGA and external logic ICs on your PCB, your design might look like my mess of cords on moving day. If I had taken more time to pack them properly, they probably would not have become tangled. When I reached into the box to pull out my audio cords, power cords, and extension cords, everything was a tangled, helpless mess. I recently moved into a new apartment, and it was time to unpack all of my electronics.
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