PIC18F2X1X/4X1X
1.0
DEVICE OVERVIEW
1.1.2
This document contains device specific information for
the following devices:
• PIC18F2410
• PIC18F2510
• PIC18F2515
• PIC18F2610
• PIC18F4410
• PIC18F4510
• PIC18F4515
• PIC18F4610
• PIC18LF2410
• PIC18LF2510
• PIC18LF2515
• PIC18LF2610
• PIC18LF4410
• PIC18LF4510
• PIC18LF4515
• PIC18LF4610
MULTIPLE OSCILLATOR OPTIONS
AND FEATURES
All of the devices in the PIC18F2X1X/4X1X 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
• Two 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 provides an
8 MHz clock and an INTRC source (approxi-
mately 31 kHz), as well as a range of 6 user
selectable clock frequencies, between 125 kHz to
4 MHz, for a total of 8 clock frequencies. 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 40 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
reference signal provided by the internal
oscillator. If a clock failure occurs, the controller is
switched to the internal oscillator block, allowing
for continued low-speed 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.
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 PIC18F2X1X/4X1X family introduces
design enhancements that make these microcontrollers
a logical choice for many high-performance, power
sensitive applications.
1.1
1.1.1
New Core Features
nanoWatt TECHNOLOGY
All of the devices in the PIC18F2X1X/4X1X 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.
•
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.
•
Lower Consumption in Key Modules:
The
power requirements for both Timer1 and the
Watchdog Timer have been minimized. See
for
values.
©
2009 Microchip Technology Inc.
DS39636D-page 9
MICROCHIP [ MICROCHIP TECHNOLOGY ]
