At work I'm asked if we can use a particular processor for a new system. Other than mechanical, electrical, and I/O considerations, software and tool support is very important.
When selecting processors for medium-sized embedded systems, I ask:
Is it a well-known architecture? For our applications, we stick with ARM, MIPS. We evaluated Intel, but they didn't meet our I/O requirements.
Linux support? I check Wikipedia and the Linux repository.
GCC support? I check the GCC repository.
ICE/JTAG support? I check Mentor Graphics and Macraigor.
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