pic24hj12gp202 Microchip Technology Inc., pic24hj12gp202 Datasheet - Page 79

• Manufacturer Part Number: pic24hj12gp202
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

7.0
The PIC24HJ12GP201/202 oscillator system provides:
• External and internal oscillator options as clock
FIGURE 7-1:
© 2007 Microchip Technology Inc.
Note:
sources
OSCO
SOSCO
OSCI
SOSCI
Note 1: See Figure 7-2 for PLL details
OSCILLATOR
CONFIGURATION
This data sheet summarizes the features
of the PIC24HJ12GP201/202 devices. It is
not intended to be a comprehensive
reference source. To complement the
information in this data sheet, refer to the
“PIC24H
Please see the Microchip web site
(www.microchip.com)
PIC24H
chapters.
Oscillator
TUN<5:0>
FRC
Primary Oscillator
Secondary Oscillator
PIC24HJ12GP201/202 OSCILLATOR SYSTEM DIAGRAM
Oscillator
Family
Family
LPRC
LPOSCEN
Reference
Reference
S1
S3
÷ 16
for
FRCDIV<2:0>
the
Manual”.
Manual
latest
PLL
Preliminary
(1)
PIC24H
XTPLL, HSPLL,
ECPLL, FRCPLL
PIC24HJ12GP201/202
Clock Fail
• An on-chip PLL to scale the internal operating
• An internal FRC oscillator that can also be used
• Clock switching between various clock sources
• Programmable clock postscaler for system power
• A Fail-Safe Clock Monitor (FSCM) that detects
• A Clock Control register (OSCCON)
• Nonvolatile Configuration bits for main oscillator
A simplified diagram of the oscillator system is shown
in Figure 7-1.
S7
XT, HS, EC
FRCDIV16
frequency to the required system clock frequency
with the PLL, thereby allowing full-speed
operation without any external clock generation
hardware
savings
clock failure and takes fail-safe measures
selection.
FRCDIVN
SOSC
LPRC
FRC
Clock Switch
NOSC<2:0> FNOSC<2:0>
S1/S3
S7
S0
S5
S4
S2
S6
÷ 2
Reset
DOZE<2:0>
WDT, PWRT,
DS70282B-page 77
Timer 1
FSCM
F
F
OSC
CY