pic24hj128gp510at-i-pt Microchip Technology Inc., pic24hj128gp510at-i-pt Datasheet - Page 127

• Manufacturer Part Number: pic24hj128gp510at-i-pt
• Description: High-performance, 16-bit Microcontrollers
• Manufacturer: Microchip Technology Inc.

9.0
The
system provides:
• Various external and internal oscillator options as
FIGURE 9-1:
© 2009 Microchip Technology Inc.
Note:
clock sources
Note 1: See Figure 9-2 for PLL details.
SOSCO
R
SOSCI
(2)
PIC24HJXXXGPX06A/X08A/X10A
2: If the Oscillator is used with XT or HS modes, an extended parallel resistor with the value of 1 MΩ must be connected.
OSCILLATOR
CONFIGURATION
OSC1
This data sheet summarizes the features
of the PIC24HJXXXGPX06A/X08A/X10A
family of devices. However, it is not
intended to be a comprehensive reference
source. To complement the information in
this data sheet, refer to the “PIC24H
Family Reference Manual”, Section 7.
“Oscillator”
available from the Microchip website
(www.microchip.com).
OSC2
Oscillator
TUN<5:0>
FRC
Primary Oscillator
Secondary Oscillator
POSCMD<1:0>
Oscillator
PIC24HJXXXGPX06A/X08A/X10A OSCILLATOR SYSTEM DIAGRAM
LPRC
(DS70227),
LPOSCEN
PIC24HJXXXGPX06A/X08A/X10A
S1
÷ 16
S3
FRCDIV<2:0>
which
oscillator
PLL
Preliminary
is
(1)
PIC24H
XTPLL, HSPLL,
ECPLL, FRCPLL
Clock Fail
• An on-chip PLL to scale the internal operating
• The internal FRC oscillator can also be used with
• 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 9-1.
S7
XT, HS, EC
FRCDIV16
frequency to the required system clock frequency
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>
DS70592A-page 125
WDT, PWRT,
Timer 1
FSCM
F
F
F
OSC
P
CY