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Atmel's AVR controllers have a pipeline with 2 stages (fetch and execute) that allows them to execute most instructions in 1 clock, which makes them relatively fast among the 8-bit controllers on the market.
The [[AVR instruction set]] is more regular than that of many other 8-bit microcontrollers ([[PIC microcontroller|PIC]] for example). However, it is not
Like the PIC, it has a dedicated [[hobby]]ist following (exemplified by the ''AVRFreaks'' Internet forum), largely due to the existence of inexpensive/free development tools, for instance a port of the GNU [[GNU Compiler Collection|GCC]] tools.▼
The acronym '''AVR''' has been reported/rumoured to stand for '''''A'''dvanced '''V'''irtual '''R'''ISC'' and/or the initials of the two company founders—'''A'''lf Egil Bogen and '''V'''egard Wollan—who for their part have chosen to let the matter rest unresolved, giving mostly shadowy answers when asked directly.▼
* [[Pointer register]]s X, Y, and Z have addressing capabilities that are different from each other.
* [[Register file]] locations 0...15 have different addressing capabilities than register file locations 16...31.
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* CLR affects flags, while SER does not, even though they seem to be complementary intructions (set all bits to 0 and respectively to 1).
* opcodes 0x95C8 and 0x9004 do exactly the same thing (LPM).
▲Like the PIC, it has a dedicated [[hobby]]ist following (exemplified by the ''AVRFreaks'' Internet forum), largely due to the existence of inexpensive/free development tools, for instance a port of the GNU [[GNU Compiler Collection|GCC]] tools.
▲The acronym '''AVR''' has been reported/rumoured to stand for '''''A'''dvanced '''V'''irtual '''R'''ISC'' and/or the initials of the two company founders—'''A'''lf Egil Bogen and '''V'''egard Wollan—who for their part have chosen to let the matter rest unresolved, giving mostly shadowy answers when asked directly.
== External links ==
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