PIC18F24J11 MICROCHIP [Microchip Technology], PIC18F24J11 Datasheet - Page 39

• Manufacturer Part Number: PIC18F24J11
• Description: 28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
• Manufacturer: MICROCHIP [Microchip Technology]

3.2.2
In HS and HSPLL Oscillator modes, a crystal or
ceramic resonator is connected to the OSC1 and
OSC2 pins to establish oscillation.
the pin connections.
The oscillator design requires the use of a parallel
resonant crystal.
FIGURE 3-2:
TABLE 3-2:
 2011 Microchip Technology Inc.
Capacitor values are for design guidance only.
These capacitors were tested with the resonators
listed below for basic start-up and operation. These
values are not optimized.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
V
See the notes following
information.
Note 1:
Note:
DD
Mode
HS
and temperature range for the application.
C1
C2
2:
(1)
(1)
Typical Capacitor Values Used:
CRYSTAL OSCILLATOR/CERAMIC
RESONATORS
Use of a series resonant crystal may give
a frequency out of the crystal manufac-
turer’s specifications.
See
of C1 and C2.
crystals with low drive level specification.
Rs may be required to avoid overdriving
16.0 MHz
XTAL
R
8.0 MHz
S
Freq
(2)
Table 3-2
Resonators Used:
CAPACITOR SELECTION FOR
CERAMIC RESONATORS
OSC2
OSC1
16.0 MHz
CRYSTAL/CERAMIC
RESONATOR OPERATION
(HS OR HSPLL
CONFIGURATION)
4.0 MHz
8.0 MHz
and
Table 3-3
Table 3-3
OSC1
27 pF
22 pF
R
PIC18F46J11
F
Figure 3-2
for initial values
Sleep
for additional
OSC2
27 pF
22 pF
To
Internal
Logic
displays
PIC18F46J11 FAMILY
TABLE 3-3:
Capacitor values are for design guidance only.
These capacitors were tested with the crystals listed
below for basic start-up and operation. These values
are not optimized.
Different capacitor values may be required to produce
acceptable oscillator operation. The user should test
the performance of the oscillator over the expected
V
See the notes following this table for additional
information.
Osc Type
DD
Note 1: Higher capacitance not only increases
HS
and temperature range for the application.
2: Since each resonator/crystal has its own
3: Rs may be required to avoid overdriving
4: Always verify oscillator performance over
the stability of oscillator, but also
increases the start-up time.
characteristics, the user should consult
the resonator/crystal manufacturer for
appropriate
components.
crystals with low drive level specification.
the V
expected for the application.
20 MHz
Crystal
4 MHz
8 MHz
Freq
CAPACITOR SELECTION FOR
CRYSTAL OSCILLATOR
DD
Crystals Used:
and temperature range that is
20 MHz
4 MHz
8 MHz
Typical Capacitor Values
values
27 pF
22 pF
15 pF
C1
Tested:
DS39932D-page 39
of
27 pF
22 pF
15 pF
external
C2