Datasheet

 2012 Microchip Technology Inc. DS30684A-page 11
PIC18(L)F2X/45K50
1.0 DEVICE OVERVIEW
This document contains device-specific information for
the following devices:
This family offers the advantages of all PIC18
microcontrollers – namely, high computational
performance at an economical price – with the addition
of high-endurance, Flash program memory. On top of
these features, the PIC18(L)F2X/45K50 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 XLP TECHNOLOGY
All of the devices in the PIC18(L)F2X/45K50 family
incorporate a range of features that can significantly
reduce power consumption during operation. Key
items include:
• Alternate Run Modes: By clocking the controller
from the Timer1 source or the internal oscillator
block, power consumption during code execution
can be reduced by as much as 90%.
• 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.
• Peripheral Module Disable bits: User code can
power down individual peripheral modules during
Run and Idle modes for further lowering dynamic
power reduction.
• 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 29.0 “Electrical Characteristics”
for values.
1.1.2 UNIVERSAL SERIAL BUS (USB)
Devices in the PIC18(L)F2X/45K50 family incorporate
a fully-featured USB communications module with a
built-in transceiver that is compliant with the USB
Specification Revision 2.0. The module supports both
low-speed and full-speed communication for all
supported data transfer types. The device
incorporates its own on-chip transceiver and 3.3V
regulator for USB.
1.1.3 MULTIPLE OSCILLATOR OPTIONS
AND FEATURES
All of the devices in the PIC18(L)F2X/45K50 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
• Six 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
second pin reassigned as general I/O)
• Two 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
INTRC oscillator, which together provide eight
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.
• 3x and 4x Phase Lock Loop (PLL) frequency
multipliers, available to both external and internal
oscillator modes, which allows clock speeds of up
to 48 MHz. Used with the internal oscillator, the
PLL gives users a complete selection of clock
speeds, from 31 kHz to 48 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:
• Active Clock Tuning: This option allows the
internal oscillator to automatically tune itself to
match USB host or external 32.768 kHz
secondary oscillator clock sources. Full-speed
USB operation can now meet specification
requirements without an external crystal, enabling
lower-cost designs.
• Fail-Safe Clock Monitor: This option constantly
monitors the main clock source against a
reference signal provided by the INTRC. 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.
•PIC18(L)F45K50
•PIC18(L)F25K50
•PIC18(L)F24K50