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Embedded Systems 6 Elektronik International 2020 It was time for such an idea Ilike ARM its founder and ex-CTO its CEO much of its management and most of their products though definitely not Cortex-A15 which burns no end of energy But to be quite honest the world shouldnt consist solely of ARM And in the RISC-Varea theres a lot of activity Many development systems from a variety of producers have been ported to RISC-Vdebuggers too Everything alright so far? Unfortunately not When it comes to embedded systems RISC-Vcould be better Lets look at the good aspects and what could be better Advantages of RISC-V RISC-Vhas many advantages compared to competing architectures ARM for instance Basically they all result from the fact that the ISA is opensource and free ➔ userdefined instructions can be added ➔ implementations are available at no cost ➔ commercial implementations come from several providers and the design can be altered Those are significant advantages and theyre likely to make RISC-Vvery popular There was need for an open standard INADEQUACIES OF RISC-V The real question is how well can RISC-Vbe used in embedded systems? First a little CPU history and something about CPU design CPUs have come a long way in the past decades In the 70ies and early 80ies most CPUs were 8-bit and CISC designs They had instructions of different size with the simple ones frequently used typically singlebyte The registers were nonuniform and typically there was an In general Ilike the RISC-Videa a free nonpatented instruction set with a number of providers and free implementations commercial implementations too from a number of providers Unfortunately however RISC-Vis only very limited in its suitability for embedded applications Acommentary by Frank Riemenschneider TIME FOR RISC-6 RISC-V FOR EMBEDDED APPLICATIONS? RATHER NOT!