mirror of https://github.com/lnis-uofu/SOFA.git
42 lines
2.2 KiB
ReStructuredText
42 lines
2.2 KiB
ReStructuredText
.. _hd_fpga_device_comparison:
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Device Comparison
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-----------------
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The High Density (HD) FPGAs are embedded FPGAs built with the Skywater 130nm High Density Standard Cell library (`Sky130_fd_SC_HD <https://cs.opensource.google/skywater-pdk/skywater-pdk/+/master:libraries/sky130_fd_sc_hd/>`_).
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.. table:: Logic capacity of High Density (HD) FPGA IPs
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+-------------------------------+------------+-----------+
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| Resource/Capacity | SOFA HD | QLSOFA HD |
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+===============================+============+===========+
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| Look-Up Tables [1]_ | 1152 | 1152 |
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+-------------------------------+------------+-----------+
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| Flip-flops | 2304 | 2304 |
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+-------------------------------+------------+-----------+
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| Soft Adders [2]_ | N/A | 1152 |
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+-------------------------------+------------+-----------+
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| Routing Channel Width [3]_ | 40 | 60 |
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+-------------------------------+------------+-----------+
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| Max. Configuration Speed [4]_ | 50MHz | 50MHz |
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+-------------------------------+------------+-----------+
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| Max. Operating Speed [4]_ | 50MHz | 50 MHz |
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+-------------------------------+------------+-----------+
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| User I/O Pins [5]_ | 144 | 144 |
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+-------------------------------+------------+-----------+
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| Max. I/O Speed [4]_ | 33MHz | 33 MHz |
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+-------------------------------+------------+-----------+
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| Core Voltage | 1.8V | 1.8V |
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+-------------------------------+------------+-----------+
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.. [1] counted by 4-input fracturable Look-Up Tables (LUTs), each of which can operate as dual-output 3-input LUTs or single-output 4-input LUT.
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.. [2] counted by 3-input Look-Up Tables (LUTs) that are organized as a carry chain
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.. [3] counted by number of uni-directional routing tracks per tile
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.. [4] bounded by the maximum speed of `GPIO cells of Skywater 130nm PDK <https://skywater-pdk.readthedocs.io/en/latest/contents/libraries/sky130_fd_io/docs/user_guide.html#design-metrics-1>`_. Higher speed may be expected when a high-speed GPIO cell is available.
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.. [5] I/Os are divided into two groups: GPIOs and embedded I/Os.
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