The second milestone has been finished!

With successful completion of Phase 2 (the FPGA core; green box) I updated the image to the current planning.

What changed:

  • A slower STM32F429 microcontroller for Phase 4 will be replaced by a Cortex A5 which can run natively Linux. It’s faster (500MHz instead of 168MHz) and it will have more memory (128MB instead of 32MB). It also has very nice security features like ARM TrustZone and it can boot signed Linux Kernels. It also has a MMU, what means, it runs full Linux with dynamic memory management (which makes it much easier!).
  • Troika was originally not planned. Short after Troika was announced a hashing core was built and integrated in the FPGA. The core is pretty fast — it needs a single clock cycle per hashing round and therefore is as fast as Curl-P81 and Keccak384. That’s very nice because (optimized) software implementations on CPUs are x10 slower than Keccak384/SHA3. Additionally, a smaller spin-off also was developed in hope small microcontrollers could make use of it.
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    Source: https://thebitcoinnews.com/iota-crypto-core-fpga%E2%80%8A-%E2%80%8A3rd-progress-report/