Is "Crypto Core" a micro-controller (or FPGA) which is able to do Proof-of-Work completely ?
As I heard that micro-controllers are not able to perform Proof-of-Work, because of power and energy limitations.
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The Crypto Core is a FPGA system which consists of Cortex M1 soft-cpu and specialized logic for accelerating algorithms like hashing (and also PoW) or type-conversions.
So, it's both - microcontroller in an FPGA and it can do PoW very fast :)
Proof-of-Work was implemented in VHDL between 26th April '18 and 26th Aug '18 and became the PiDiver: https://github.com/shufps/iota_vhdl_pow (Source: https://gitlab.com/iccfpga/iccfpga-core/wikis/home)
Micro-controllers and PoW are not the best combination, one solution to it is Azimuth