PIC24FJ256DA210 Datasheet, PDF (141/408 Pages) Microchip Technology – 64/100-Pin, 16-Bit Flash Microcontrollers with Graphics Controller and USB On-The-Go (OTG)

PIC24FJ256DA210 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. For more information, refer to the
“PIC24F Family Reference Manual”,
Section 6. “Oscillator” (DS39700). The
information in this data sheet supersedes
the information in the FRM.
The oscillator system for PIC24FJ256DA210 family
devices has the following features:
• A total of four external and internal oscillator options
as clock sources, providing 11 different clock modes
• An on-chip PLL block to boost internal operating
frequency on select internal and external oscillator
sources, and to provide a precise clock source for
peripherals, such as USB and graphics
• 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 separate and independently configurable system
clock output for synchronizing external hardware
A simplified diagram of the oscillator system is shown
in Figure 8-1.
FIGURE 8-1:
OSCO
OSCI
PIC24FJ256DA210 FAMILY CLOCK DIAGRAM
PIC24FJ256DA210 Family
Clock for Display Interface
48/96 MHz Clock for Graphics Controller Module
48 MHz USB Clock
Primary Oscillator
96 MHz PLL⁽¹⁾
CPDIV<1:0>
XT, HS, EC
PLL and
DIV
XTPLL, HSPLL
ECPLL,FRCPLL
REFOCON<15:8>
Reference Clock
Generator
REFO
PLLDIV<2:0>
GCLKDIV<6:0>
FRC
Oscillator _{8 MHz}
(nominal)
8 MHz/
4 MHz
CLKDIV<10:8>
1/16
LPRC
Oscillator
31 kHz (nominal)
FRCDIV
FRC
LPFRC
LPRC
SOSC
Peripherals
CLKO
CPU
CLKDIV<14:12>
SOSCO
SOSCI
Secondary Oscillator
SOSCEN
Enable
Oscillator
Note 1: Refer to Figure 8-2 for more information on the 96 MHz PLL block.
Clock Control Logic
Fail-Safe
Clock
Monitor
WDT
Clock Source Option
for Other Modules
 2010 Microchip Technology Inc.
DS39969B-page 141