PIC24FJ128GA010_12 Datasheet, PDF (97/258 Pages) Microchip Technology – 64/80/100-Pin, General Purpose, 16-Bit Flash Microcontrollers

PIC24FJ128GA010 FAMILY
8.0 OSCILLATOR
CONFIGURATION
Note:
This data sheet summarizes the features of
this group of PIC24F devices. It is not
intended to be a comprehensive reference
source. Refer to Section 6. “Oscillator”
(DS39700) in the “PIC24F Family
Reference Manual” for more information.
The oscillator system for PIC24FJ128GA010 family
devices has the following features:
• A total of four external and internal oscillator options
as clock sources, providing 11 different clock modes
• On-chip 4x PLL to boost internal operating frequency
on select internal and external oscillator sources
• Software-controllable switching between various
clock sources
• Software-controllable postscaler for selective
clocking of CPU for system power savings
• A Fail-Safe Clock Monitor (FSCM) that detects
clock failure and permits safe application recovery
or shutdown
A simplified diagram of the oscillator system is shown
in Figure 8-1.
FIGURE 8-1:
PIC24FJ128GA010 FAMILY CLOCK DIAGRAM
OSC1
OSC2
Primary Oscillator
8 MHz/
4 MHz
PIC24FJ128GA010 Family
XT, HS, EC
4 x PLL
XTPLL, HSPLL,
ECPLL, FRCPLL
CLKO
CLKDIV<14:12>
CPU
FRC
Oscillator
8 MHz
(Nominal)
CLKDIV<10:8>
FRCDIV
FRC
Peripherals
SOSCO
SOSCI
LPRC
Oscillator _{31 kHz (Nominal)}
Secondary Oscillator
SOSCEN
Enable
Oscillator
LPRC
SOSC
Clock Control Logic
Fail-Safe
Clock
Monitor
WDT, PWRT
Clock Source Option
for Other Modules
 2005-2012 Microchip Technology Inc.
DS39747F-page 97