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PIC18F1XK22 Datasheet(PDF) 9 Page - Microchip Technology

Part # PIC18F1XK22
Description  20-Pin Flash Microcontrollers with nanoWatt XLP Technology
Download  388 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC18F1XK22 Datasheet(HTML) 9 Page - Microchip Technology

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 2010 Microchip Technology Inc.
Preliminary
DS41365D-page 9
PIC18F1XK22/LF1XK22
1.0
DEVICE OVERVIEW
This family offers the advantages of all PIC18
microcontrollers
namely,
high
computational
performance with the addition of high-endurance,
Flash program memory. On top of these features, the
PIC18F1XK22/LF1XK22 family introduces design
enhancements that make these microcontrollers a
logical choice for many high-performance, power
sensitive applications.
1.1
New Core Features
1.1.1
nanoWatt XLP TECHNOLOGY
All of the devices in the PIC18F1XK22/LF1XK22 family
incorporate a range of features that can significantly
reduce power consumption during operation. Key
items include:
• Multiple Idle Modes: The controller can also run
with its CPU core disabled but the peripherals still
active. In these states, power consumption can be
reduced even further, to as little as 4% of normal
operation requirements.
• On-the-fly Mode Switching: The
power-managed modes are invoked by user code
during operation, allowing the user to incorporate
power-saving ideas into their application’s
software design.
• Low Consumption in Key Modules: The
power requirements for both Timer1 and the
Watchdog Timer are minimized. See
Section 25.0 “Electrical Specifications”
for values.
1.1.2
MULTIPLE OSCILLATOR OPTIONS
AND FEATURES
All of the devices in the PIC18F1XK22/LF1XK22 family
offer ten different oscillator options, allowing users a
wide range of choices in developing application
hardware. These include:
• Four Crystal modes, using crystals or ceramic
resonators
• External Clock modes, offering the option of using
two pins (oscillator input and a divide-by-4 clock
output) or one pin (oscillator input, with the sec-
ond pin reassigned as general I/O)
• External RC Oscillator modes with the same pin
options as the External Clock modes
• An internal oscillator block which contains a
16 MHz HFINTOSC oscillator and a 31 kHz
LFINTOSC oscillator which together provide 8
user selectable clock frequencies, from 31 kHz to
16 MHz. This option frees the two oscillator pins
for use as additional general purpose I/O.
• A Phase Lock Loop (PLL) frequency multiplier,
available to both the high-speed crystal and inter-
nal oscillator modes, which allows clock speeds of
up to 64 MHz. Used with the internal oscillator, the
PLL gives users a complete selection of clock
speeds, from 31 kHz to 32 MHz – all without using
an external crystal or clock circuit.
Besides its availability as a clock source, the internal
oscillator block provides a stable reference source that
gives the family additional features for robust
operation:
• Fail-Safe Clock Monitor: This option constantly
monitors the main clock source against a refer-
ence signal provided by the LFINTOSC. If a clock
failure occurs, the controller is switched to the
internal oscillator block, allowing for continued
operation or a safe application shutdown.
• Two-Speed Start-up: This option allows the
internal oscillator to serve as the clock source
from Power-on Reset, or wake-up from Sleep
mode, until the primary clock source is available.


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