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PIC18F4550ESOSQTP Datasheet(PDF) 26 Page - Microchip Technology |
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PIC18F4550ESOSQTP Datasheet(HTML) 26 Page - Microchip Technology |
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26 / 430 page  PIC18F2455/2550/4455/4550 DS39632D-page 24 Preliminary © 2007 Microchip Technology Inc. FIGURE 2-1: PIC18F2455/2550/4455/4550 CLOCK DIAGRAM PIC18F2455/2550/4455/4550 FOSC3:FOSC0 Secondary Oscillator T1OSCEN Enable Oscillator T1OSO T1OSI Clock Source Option for other Modules OSC1 OSC2 Sleep Primary Oscillator XT, HS, EC, ECIO T1OSC CPU Peripherals IDLEN 8 MHz 4 MHz 2 MHz 1 MHz 500 kHz 125 kHz 250 kHz OSCCON<6:4> 111 110 101 100 011 010 001 000 31 kHz INTRC Source Internal Oscillator Block WDT, PWRT, FSCM 8 MHz Internal Oscillator (INTOSC) OSCCON<6:4> Clock Control OSCCON<1:0> Source 8 MHz 31 kHz (INTRC) 0 1 OSCTUNE<7> and Two-Speed Start-up 96 MHz PLL PLLDIV CPUDIV 0 1 0 1 ÷ 2 111 110 101 100 011 010 001 000 ÷ 1 ÷ 2 ÷ 3 ÷ 4 ÷ 5 ÷ 6 ÷ 10 ÷ 12 11 10 01 00 ÷ 2 ÷ 3 ÷ 4 ÷ 6 USB USBDIV FOSC3:FOSC0 HSPLL, ECPLL, 11 10 01 00 ÷ 1 ÷ 2 ÷ 3 ÷ 4 CPUDIV 1 0 Peripheral FSEN ÷ 4 USB Clock Source XTPLL, ECPIO Primary Clock (4 MHz Input Only) |
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