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  • #11
    Originally posted by AdrianBc View Post
    When using just the Cortex-A53 cores, this computer is slow, even if it is adequate for the kind of tasks that people do with a Raspberry Pi.

    On the other hand, for the kind of users who are able to implement an FPGA design, this board is awesome. It has a much more powerful FPGA than any other board in this price range.
    You're right that CPU performance isn't really the point, here. However, unless this is an older SoC, I'd at least expect it to use A55 cores.

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    • #12
      Originally posted by coder View Post
      You're right that CPU performance isn't really the point, here. However, unless this is an older SoC, I'd at least expect it to use A55 cores.
      It is indeed a rather old SoC.

      All the FPGA manufacturers had difficulties with transitioning to more recent CMOS manufacturing processes, so all the FPGAs that are easily available are made in old processes.

      Xilinx has announced already a few years ago some successors for the UltraScale+, but those have been practically nonexistent until now, at least as retail products. Even UltraScale+ is very hard to get in comparison with older FPGAs.

      About Cortex-A53 vs. Cortex-A55, you are right.

      Cortex-A55 and all the other ARM cores which implement at least the Armv8.2-A architecture should always be the only acceptable choice for new purchases, instead of the ancient cores which implement only the Armv8.0-A architecture, e.g. Cortex-A53, Cortex-A72 or Cortex-A73.

      Armv8.2-A has corrected an important mistake in the original Armv8.0-A ISA, the lack of atomic instructions, and it has also various other useful improvements.

      Cores implementing the much improved Armv9-A ISA would be even better, but the first such cores have been introduced only last year, so they are available only in expensive smartphones. Some years will pass until they will be available in cheap single-board computers, e.g. with Cortex-A510 instead of Cortex-A55.


      However, in this product the FPGA is the main feature. The ARM cores, Cortex-A53 and Cortex-R5, even if they are both obsolete, remove the necessity of wasting a good part of the FPGA by implementing some processor cores and they are faster than anything that can be made using only the FPGA logic and multiplier cells.


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