Note the following details of the code protection feature on Microchip devices:
•
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
Microchip is willing to work with the customer who is concerned about the integrity of their code.
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
•
•
•
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR WAR-
RANTIES OF ANY KIND WHETHER EXPRESS OR IMPLIED,
WRITTEN OR ORAL, STATUTORY OR OTHERWISE,
RELATED TO THE INFORMATION, INCLUDING BUT NOT
LIMITED TO ITS CONDITION, QUALITY, PERFORMANCE,
MERCHANTABILITY OR FITNESS FOR PURPOSE.
Microchip disclaims all liability arising from this information and
its use. Use of Microchip’s products as critical components in
life support systems is not authorized except with express
written approval by Microchip. No licenses are conveyed,
implicitly or otherwise, under any Microchip intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, Accuron,
dsPIC, K
EE
L
OQ
, microID, MPLAB, PIC, PICmicro, PICSTART,
PRO MATE, PowerSmart, rfPIC, and SmartShunt are
registered trademarks of Microchip Technology Incorporated
in the U.S.A. and other countries.
AmpLab, FilterLab, Migratable Memory, MXDEV, MXLAB,
PICMASTER, SEEVAL, SmartSensor and The Embedded
Control Solutions Company are registered trademarks of
Microchip Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, dsPICDEM,
dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR,
FanSense, FlexROM, fuzzyLAB, In-Circuit Serial
Programming, ICSP, ICEPIC, Linear Active Thermistor,
MPASM, MPLIB, MPLINK, MPSIM, PICkit, PICDEM,
PICDEM.net, PICLAB, PICtail, PowerCal, PowerInfo,
PowerMate, PowerTool, Real ICE, rfLAB, rfPICDEM, Select
Mode, Smart Serial, SmartTel, Total Endurance, UNI/O,
WiperLock and Zena are trademarks of Microchip Technology
Incorporated in the U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2006, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received ISO/TS-16949:2002 quality system certification for
its worldwide headquarters, design and wafer fabrication facilities in
Chandler and Tempe, Arizona and Mountain View, California in
October 2003. The Company’s quality system processes and
procedures are for its PICmicro
®
8-bit MCUs, K
EE
L
OQ
®
code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
DS39760A-page ii
Advance Information
©
2006 Microchip Technology Inc.
PIC18F2450/4450
28/40/44-Pin, High-Performance, 12 MIPS, Enhanced Flash,
USB Microcontrollers with nanoWatt Technology
Universal Serial Bus Features:
• USB V2.0 Compliant
• Low speed (1.5 Mb/s) and full speed (12 Mb/s)
• Supports control, interrupt, isochronous and
bulk transfers
• Supports up to 32 endpoints (16 bidirectional)
• 256-byte dual access RAM for USB
• On-chip USB transceiver with on-chip voltage
regulator
• Interface for off-chip USB transceiver
Peripheral Highlights:
•
•
•
•
High-current sink/source: 25 mA/25 mA
Three external interrupts
Three Timer modules (Timer0 to Timer2)
Capture/Compare/PWM (CCP) module:
- Capture is 16-bit, max. resolution 5.2 ns
- Compare is 16-bit, max. resolution 83.3 ns
- PWM output: PWM resolution is 1 to 10-bit
• Enhanced USART module:
- LIN bus support
• 10-bit, up to 13-channel Analog-to-Digital Converter
module (A/D):
- Up to 100 ksps sampling rate
- Programmable acquisition time
Power-Managed Modes:
•
•
•
•
•
•
•
•
Run: CPU on, peripherals on
Idle: CPU off, peripherals on
Sleep: CPU off, peripherals off
Idle mode currents down to 5.8
μA
typical
Sleep mode currents down to 0.1
μA
typical
Timer1 oscillator: 1.8
μA
typical, 32 kHz, 2V
Watchdog Timer: 2.1
μA
typical
Two-Speed Oscillator Start-up
Special Microcontroller Features:
• C compiler optimized architecture with optional
extended instruction set
• Flash memory retention: > 40 years
• Self-programmable under software control
• Priority levels for interrupts
• 8 x 8 Single-Cycle Hardware Multiplier
• Extended Watchdog Timer (WDT):
- Programmable period from 4 ms to 131s
• Programmable Code Protection
• Single-Supply In-Circuit Serial Programming™
(ICSP™) via two pins
• In-Circuit Debug (ICD) via two pins
• Optional dedicated ICD/ICSP port
(44-pin TQFP devices only)
• Wide operating voltage range (2.0V to 5.5V)
Flexible Oscillator Structure:
• Four Crystal modes, including High-Precision PLL
for USB
• Two External Clock modes, up to 48 MHz
• Internal 31 kHz oscillator
• Secondary oscillator using Timer1 @ 32 kHz
• Dual oscillator options allow microcontroller and
USB module to run at different clock speeds
• Fail-Safe Clock Monitor:
- Allows for safe shutdown if any clock stops
Program Memory
Device
Flash
(bytes)
16K
16K
# Single-Word
Instructions
8192
8192
Data
Memory
SRAM
(bytes)
768*
768*
I/O
10-Bit A/D
(ch)
10
13
CCP
EUSART
Timers
8/16-Bit
1/2
1/2
PIC18F2450
PIC18F4450
*
23
34
1
1
1
1
Includes 256 bytes of dual access RAM used by USB module and shared with data memory.
©
2006 Microchip Technology Inc.
Advance Information
DS39760A-page 1
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