PIC24EP256GU810-I Datasheet, PDF (178/622 Pages) Electronic Film Capacitors, Inc. – 16-Bit Microcontrollers and Digital Signal Controllers with High-Speed PWM, USB and Advanced Analog

dsPIC33EPXXX(GP/MC/MU)806/810/814 and PIC24EPXXX(GP/GU)810/814
FIGURE 9-1:
OSCILLATOR SYSTEM DIAGRAM
Primary Oscillator (POSC)
OSC1
POSCCLK
R⁽²⁾
S3
OSC2
S1
POSCMD<1:0>
PLL⁽¹⁾
XT, HS, EC
XTPLL, HSPLL,
ECPLL, FRCPLL
FVCO⁽¹⁾
S2
S1/S3
DOZE<2:0>
FRC
FRCCLK
Oscillator
FRCDIVN
÷2
S7
FCY
FP
FOSC
TUN<5:0>
LPRC
Oscillator
Secondary Oscillator (SOSC)
SOSCO
FRCDIV<2:0>
FRCDIV16
÷ 16
S6
FRC
LPRC ^S0
S5
SOSC
S4
Reference Clock Generation
POSCCLK
FOSC
÷ N ^REFCLKO
RPn
ROSEL RODIV<3:0>
SOSCI
LPOSCEN
Clock Fail Clock Switch
Reset
Auxiliary Clock Generation
(dsPIC33EPXXMU8XX and
PIC24EPXXXGU8XX Devices Only)
Auxiliary Oscillator ^{POSCCLK FRCCLK}
ENAPLL
ASRCSEL FRCSEL
S7
NOSC<2:0> FNOSC<2:0>
APLL^{(3) FAVCO}
FVCO⁽¹⁾
WDT, PWRT,
FSCM
Timer1
÷ N ^{ACLK USB}
ENAPLL SELACLK APLLPOST<2:0>
Note 1: See Figure 9-2 for PLL and FVCO details.
2: If the oscillator is used with XT or HS modes, an external parallel resistor with the value of 1 M must be connected.
3: See Figure 9-3 for APLL details.
DS70616G-page 178
 2009-2012 Microchip Technology Inc.