| ??? 03/05/09 09:12 Read: times |
#163087 - Which single-clocker is cheaper than an ARM? Responding to: ???'s previous message |
Richard Erlacher said:
As for the "religious" issue ... I guess we'll have to agree to disagree. I can understand the desirability of using a small ARM-core single-chip microcomputer, but by its very central characteristics, it differs considerably from the classic microcontroller. Further, for its cost, ARM can't well compete with the performance of current-generation 805x one-clockers. That may change, of course, but I won't hold my breath.
RE Perhaps you would like to back up this statement with a current example single-clocker price. I would agree that future pricing may well change. In terms of execution speed, I would agree that 8 bit operations are comparable. It is also a bit of a pain splitting a 32 bit port, but for anything wider than 8 bits there is no contest. And this applies to common peripherals too. Execution timing is seldom that critical except to delay an operation. In which case using the hardware peripheral timers is generally wiser than cycle wasting. Of course no one can argue about a single ASM instruction. But how many people are prepared to wade through pages of ASM that would be concisely put in a few HLL statements? Perhaps as an experiment, Richard could ask a colleague to read his documentation and code, and then ask him to maintain his project. David. |
