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PIC micro MIPS
Hi,
im a total newbie and playing with PIC micro's. I have a pic 16F818 and noticed that it has an internal oscillator that can be selected from 31kHz to 8MHz. Also the Data sheet for this pic states that the MIPS = oscillator frequency / 4. so at 4MHz you get 1MIPS. But it does not state if this is the internal oscillator of the external one. The external oscillator can run up to 20MHz and the internal 8MHz. Am i right to assume it means the internal one and so the total number of instructions it can execute a second is (8MHz / 4) 4,000,000 ? (assuming each instruction takes 1 cylce). Thanks for your time. |
#2
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PIC micro MIPS
"Richard Harris" schreef in bericht ... Hi, im a total newbie and playing with PIC micro's. I have a pic 16F818 and noticed that it has an internal oscillator that can be selected from 31kHz to 8MHz. Also the Data sheet for this pic states that the MIPS = oscillator frequency / 4. so at 4MHz you get 1MIPS. But it does not state if this is the internal oscillator of the external one. The external oscillator can run up to 20MHz and the internal 8MHz. Am i right to assume it means the internal one and so the total number of instructions it can execute a second is (8MHz / 4) 4,000,000 ? (assuming each instruction takes 1 cylce). Thanks for your time. The internal oscillator is optional for use (you can save parts for simple designs). This one is not very accurate compared to some other X-tals. For both you must the frequency must be divided by 4 for the instructions. Some Pics have an internal multiplier, but the 16F not is I remember correct. Alexander |
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