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Title: Fastest configuration for PIC18f4550 Post by: tzehon on August 27, 2009, 07:29:51 19:29 Hi,
May i know what is the best combination (crystal) and setting (pll) to get 12 mips (48mhz) at PIC18f4550 ? And how we can overclock a PIC ? regards, th Title: Re: Fastest configuration for PIC18f4550 Post by: bbarney on August 28, 2009, 12:04:10 00:04 Maybe this doc can help
Title: Re: Fastest configuration for PIC18f4550 Post by: tzehon on August 28, 2009, 01:14:25 01:14 Hi,
Thank you for the document, If i use 48MHZ crystal, does the microcontroller will become faster ? Do i hav to provide clock to USB if i dint use the USB feature on the chip? and how can i overclock the PIC to have speed faster than 12 MIPS ? TH Title: Re: Fastest configuration for PIC18f4550 Post by: tzehon on August 28, 2009, 05:49:38 17:49 Hi,
Can anyone tell me how to overclock PIC ? th Title: Re: Fastest configuration for PIC18f4550 Post by: oldvan on August 28, 2009, 10:17:40 22:17 Higher speed crystal == overclocked.
If 12 MHz crystal and 4X PLL gives 48 MHz, try a 12.5 MHz crystal and 4X PLL for 50 MHz performance. Experiment with progressively higher frequency until either the chip gives off smoke, does not oscillate, or you get the performance you need. Add a heat sink to the chip to remove the extra heat, it will last longer. |