PIC18F24J10-E/ML MICROCHIP [Microchip Technology], PIC18F24J10-E/ML Datasheet - Page 26

• Manufacturer Part Number: PIC18F24J10-E/ML
• Description: 28/40/44-Pin High-Performance RISC Microcontrollers with nanoWatt Technology
• Manufacturer: MICROCHIP [Microchip Technology]

PIC18F45J10 FAMILY
TABLE 2-2:
DS39682C-page 24
Osc Type
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.
DD
Note 1: Higher capacitance increases the stability
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
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:
of
27 pF
22 pF
15 pF
external
C2
Preliminary
2.3
The EC and ECPLL Oscillator modes require an exter-
nal clock source to be connected to the OSC1 pin.
There is no oscillator start-up time required after a
Power-on Reset or after an exit from Sleep mode.
In the EC Oscillator mode, the oscillator frequency
divided by 4 is available on the OSC2 pin. This signal
may be used for test purposes or to synchronize other
logic. Figure 2-2 shows the pin connections for the EC
Oscillator mode.
FIGURE 2-2:
An external clock source may also be connected to the
OSC1 pin in the HS mode, as shown in Figure 2-3. In
this configuration, the divide-by-4 output on OSC2 is
not available.
FIGURE 2-3:
Clock from
Ext. System
Clock from
Ext. System
External Clock Input (EC Modes)
F
Open
OSC
/4
EXTERNAL CLOCK
INPUT OPERATION
(EC CONFIGURATION)
EXTERNAL CLOCK INPUT
OPERATION (HS OSC
CONFIGURATION)
© 2007 Microchip Technology Inc.
OSC1/CLKI
OSC2/CLKO
OSC1
OSC2
PIC18F45J10
PIC18F45J10
(HS Mode)