PIC12F635T-I/MD Microchip Technology, PIC12F635T-I/MD Datasheet - Page 40
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PIC12F635T-I/MD
Manufacturer Part Number
PIC12F635T-I/MD
Description
1.75 KB Flash, 64 RAM, 6 I/O 8 DFN 4x4mm T/R
Manufacturer
Microchip Technology
Series
PIC® 12Fr
Specifications of PIC12F635T-I/MD
Core Processor
PIC
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, WDT
Number Of I /o
5
Program Memory Size
1.75KB (1K x 14)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
2 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
AC164326 - MODULA SKT PM3 20QFNXLT08DFN2 - SOCKET TRANSITION ICE 14DIP/8DFNXLT08DFN - SOCKET TRANSITION ICE 8DFN
Data Converters
-
Connectivity
-
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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PIC12F635/PIC16F636/639
3.4.3
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
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 con-
sumption 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:
DS41232D-page 38
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
high gain
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
.
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 to 10 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)
DD
R
P (3)
R
S
and temperature range that is
(1)
CERAMIC RESONATOR
OPERATION
(XT OR HS MODE)
© 2007 Microchip Technology Inc.
F
varies with the Oscillator mode
OSC1/CLKIN
OSC2/CLKOUT
S
R
) may be required for
®
F
PIC
(2)
Oscillator Design”
®
®
Oscillator
MCU
®
and PIC
Sleep
To Internal
Logic
®
.
P
)
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