DSPIC33FJ64MC508 Microchip Technology Inc., DSPIC33FJ64MC508 Datasheet - Page 139

• Manufacturer Part Number: DSPIC33FJ64MC508
• Description: High-performance, 16-bit Digital Signal Controllers
• Manufacturer: Microchip Technology Inc.

8.0
The dsPIC33FJXXXMCX06/X08/X10 Motor Control
Family oscillator system provides the following:
• Various external and internal oscillator options as
FIGURE 8-1:
© 2007 Microchip Technology Inc.
Note:
Note 1: See Figure 8-2 for PLL details
SOSCO
OSC2
OSC1
SOSCI
OSCILLATOR
CONFIGURATION
This data sheet summarizes the features
of this group of dsPIC33FJXXXMCX06/
X08/X10 Motor Control Family devices. It
is not intended to be a comprehensive
reference source. To complement the
information in this data sheet, refer to the
“dsPIC33F Family Reference Manual”.
Refer
(www.microchip.com)
dsPIC33F
chapters.
Oscillator
TUN<5:0>
FRC
Primary Oscillator
Secondary Oscillator
dsPIC33FJXXXMCX06/X08/X10 MOTOR CONTROL FAMILY
to
dsPIC33FJXXXMCX06/X08/X10 MOTOR CONTROL FAMILY OSCILLATOR
SYSTEM DIAGRAM
Oscillator
LPRC
the
family
LPOSCEN
Microchip
reference
S1
S3
÷ 16
for
FRCDIV<2:0>
the
web
manual
latest
site
PLL
(1)
dsPIC33F
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 8-1.
S7
XT, HS, EC
FRCDIV16
clock sources
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
S6
S0
S5
S4
S2
÷ 2
Reset
DOZE<2:0>
DS70287A-page 137
WDT, PWRT,
Timer 1
FSCM
F
F
OSC
CY