PIC12F609-I/PQTP MICROCHIP [Microchip Technology], PIC12F609-I/PQTP Datasheet - Page 29

• Manufacturer Part Number: PIC12F609-I/PQTP
• Description: 8-Pin Flash-Based, 8-Bit CMOS Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

3.3.3
The LP, XT and HS modes support the use of quartz
crystal resonators or ceramic resonators connected to
OSC1 and OSC2 (Figure 3-3). The mode selects a low,
medium or high gain
inverter-amplifier to support various resonator types
and speed.
LP Oscillator mode selects the lowest gain setting of
the internal inverter-amplifier. LP mode current
consumption is the least of the three modes. This mode
is designed to drive only 32.768 kHz tuning-fork type
crystals (watch crystals).
XT Oscillator mode selects the intermediate gain
setting of the internal inverter-amplifier. XT mode
current consumption is the medium of the three modes.
This mode is best suited to drive resonators with a
medium drive level specification.
HS Oscillator mode selects the highest gain setting of
the internal inverter-amplifier. HS mode current
consumption is the highest of the three modes. This
mode is best suited for resonators that require a high
drive setting.
Figure 3-3 and Figure 3-4 show typical circuits for
quartz crystal and ceramic resonators, respectively.
FIGURE 3-3:
© 2006 Microchip Technology Inc.
Note 1: A series resistor (R
C1
C2
2: The value of R
quartz crystals with low drive level.
selected (typically between 2 M
LP, XT, HS MODES
Quartz
Crystal
R
S
(1)
QUARTZ CRYSTAL
OPERATION (LP, XT OR
HS MODE)
F
varies with the Oscillator mode
OSC1/CLKIN
OSC2/CLKOUT
setting of the internal
R
S
F
PIC
) may be required for
(2)
®
MCU
to 10 M
Sleep
To Internal
Logic
PIC12F609/615/12HV609/615
.
Preliminary
FIGURE 3-4:
Note 1: A series resistor (R
Note 1: Quartz crystal characteristics vary according
C1
C2 Ceramic
2: The value of R
3: An additional parallel feedback resistor (R
2: Always verify oscillator performance over
3: For oscillator design assistance, reference
Resonator
ceramic resonators with low drive level.
selected (typically between 2 M
may be required for proper ceramic resonator
operation.
• AN826, “Crystal Oscillator Basics and
• AN849, “Basic PIC
• AN943, “Practical PIC
• AN949, “Making Your Oscillator Work”
to type, package and manufacturer. The
user should consult the manufacturer data
sheets for specifications and recommended
application.
the V
expected for the application.
the following Microchip Applications Notes:
Crystal Selection for rfPIC
Devices” (DS00826)
(DS00849)
Analysis and Design” (DS00943)
(DS00949)
R
DD
P
R
(3)
S
and temperature range that is
(1)
CERAMIC RESONATOR
OPERATION
(XT OR HS MODE)
F
varies with the Oscillator mode
OSC1/CLKIN
OSC2/CLKOUT
S
R
) may be required for
®
F
PIC
(2)
Oscillator Design”
®
®
Oscillator
DS41302A-page 27
MCU
®
and PIC
to 10 M
Sleep
To Internal
Logic
®
.
P
)