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Cmod S7: Breadboardable Spartan-7 FPGA Module

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$99.00

$ 42 .99 $42.99

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About this item

  • Xilinx Spartan-7 FPGA (XC7S25-1CSGA225C)
  • Memory: 4 MB Quad-SPI Flash
  • USB-JTAG programming circuitry, USB-UART bridge
  • 2 Buttons, 4 LEDs, 1 RGB LED
  • 1 Pmod connector, 8 total FPGA I/O
  • 48-pin DIP form-factor header, 32 total FPGA I/O, 2 single-ended 0-3.3V analog inputs to XADC, 2 power pins


The Cmod, or Carrier Module, family of products is designed to offer quick, simple, and flexible integration of an FPGA into circuit design, prototyping, and learning/hobby projects. The Digilent Cmod S7 is a small, 48-pin DIP form factor board, populated with 36 pins, built around a Xilinx Spartan-7 FPGA that brings FPGA power and prototyping to a solderless breadboard. The board includes a Quad-SPI flash for programming, as well as a USB-JTAG programming circuit and USB-UART bridge. The Cmod S7 also features a clock source, Pmod port, and onboard I/O with LEDs and pushbuttons. There are 32 FPGA I/O signals, 2 FPGA analog input signals, an external power input rail, and ground that are routed to 100-mil-spaced through-hole pins, making the Cmod S7 compatible with solderless breadboards. This form factor makes the Cmod S7 a great option for flexible and affordable prototyping, or learning FPGA and digital logic circuits. At just .7" by 3.05", it can also be loaded in a standard socket and used in embedded systems. The Spartan-7 FPGA on the Cmod S7 fits performance into a small form-factor packaging. With the MicroBlaze Soft Processor Core from Xilinx, you can create embedded applications with a variety of peripherals, memory, and interfaces.


FR
Reviewed in the United States on March 9, 2021
Documentation is great, works out of the box with your choice of hdl and Digilent Adept for sending the bitstream. I wish the board had some more break out pins from the fpga, as that would seem to be the bottleneck, but other than that it works as advertised. I appreciate that I can drop this into a female pin header and expect it to work in any project.
Brendan
Reviewed in the United States on March 23, 2021
It is an FPGA, good points are that the FPGA is sufficient to do stuff with.Negative point is that there is no RAM module, so the most memory it can have is what is available via Block-RAM.Also there is no SDcard holder or similar, so one would need to provide their own SDcard holder externally.I was able to use it like a microcontroller, and was able to fit a 64-bit RISC-style CPU core and was also able to fit in a double-precision floating point unit and similar.The FPGA has enough internal Block RAM that I was able to use ~ 128K of block RAM as RAM (with another 48K as ROM). If it had a DRAM module though, its capabilities could be greatly extended, but alas (one could buy the A7-35T, but this costs a lot more, and 512K still isn't a lot; or the A7-15T, with more RAM but a smaller FPGA, ...).Say, for example, if it had a 64MB or 128MB DDR module, then one could have the option to run an actual OS or similar on it.Being able to put it on a breadboard is nice, this is one of the main reasons I bought it, makes it more useful as a controller. One could potentially also socket it onto perfboard via repurposed DIP sockets or similar, ...Either way, if one wants to design their own custom microcontroller or similar, with special purpose (fairly high speed) IO peripherals and similar, something like this seem like a pretty good option.
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