[sdiy] 8 bit MCUs, why bother? (branch off "LFSR digital noise source")
gordonjcp at gjcp.net
Thu Nov 14 22:31:05 CET 2019
On Thu, Nov 14, 2019 at 08:10:33PM +0000, Tom Wiltshire wrote:
> They’re *not* obsolete. There are a lot of applications where something cheap and cheerful is what you need. Replacing a handful of logic chips that cost pence with a uP that costs a few pence less is one - that’s how we got here in the first place. For example, every sensor in your car probably has one doing CAN bus comms with whatever central ECU the car uses. While the ECU might need to be a 32-bit chip, a thing that receives a message and turns a brake light on doesn’t, or a thing that reads a tyre pressure sensor and broadcasts the reading.
A few years ago, or maybe twenty, folk used to say "oh there's more
computer power in a modern car than too man to the Moon!" and it was
true - the engine ECU alone had more computer power than the stuff
onboard all the Apollo 11 craft put together.
A modern car a year or two old has more computer power than that - much
more - just in the steering wheel.
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