PIC24EP256GU810-I Datasheet, PDF (183/622 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
REGISTER 9-1: OSCCON: OSCILLATOR CONTROL REGISTER^(1,3) (CONTINUED)
bit 3
CF: Clock Fail Detect bit (read/clear by application)
1 = FSCM has detected clock failure
0 = FSCM has not detected clock failure
bit 2
Unimplemented: Read as ‘0’
bit 1
LPOSCEN: Secondary (LP) Oscillator Enable bit
1 = Enables Secondary Oscillator
0 = Disables Secondary Oscillator
bit 0
OSWEN: Oscillator Switch Enable bit
1 = Requests oscillator switch to selection specified by NOSC<2:0> bits
0 = Oscillator switch is complete
Note 1:
2:
3:
Writes to this register require an unlock sequence. Refer to Section 7. “Oscillator” (DS70580) in the
“dsPIC33E/PIC24E Family Reference Manual” (available from the Microchip web site) for details.
Direct clock switches between any Primary Oscillator mode with PLL and FRCPLL mode are not permit-
ted. This applies to clock switches in either direction. In these instances, the application must switch to
FRC mode as a transition clock source between the two PLL modes.
This register resets only on a Power-on Reset (POR).
 2009-2012 Microchip Technology Inc.
DS70616G-page 183