Note the following details of the code protection feature on PICmicro
®
MCUs.
•
•
•
The PICmicro family meets the specifications contained in the Microchip Data Sheet.
Microchip believes that its family of PICmicro microcontrollers is one of the most secure products 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 knowl-
edge, require using the PICmicro microcontroller in a manner outside the operating specifications contained in the data sheet.
The person doing so may be 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 product.
•
•
•
If you have any further questions about this matter, please contact the local sales office nearest to you.
Information contained in this publication regarding device
applications and the like is intended through suggestion only
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
No representation or warranty is given and no liability is
assumed by Microchip Technology Incorporated with respect
to the accuracy or use of such information, or infringement of
patents or other intellectual property rights arising from such
use or otherwise. Use of Microchip’s products as critical com-
ponents in life support systems is not authorized except with
express written approval by Microchip. No licenses are con-
veyed, implicitly or otherwise, under any intellectual property
rights.
Trademarks
The Microchip name and logo, the Microchip logo, FilterLab,
K
EE
L
OQ
, microID, MPLAB, PIC, PICmicro, PICMASTER,
PICSTART, PRO MATE, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip Tech-
nology Incorporated in the U.S.A. and other countries.
dsPIC, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB,
In-Circuit Serial Programming, ICSP, ICEPIC, microPort,
Migratable Memory, MPASM, MPLIB, MPLINK, MPSIM,
MXDEV, MXLAB, PICC, PICDEM, PICDEM.net, rfPIC, Select
Mode and Total Endurance are trademarks of Microchip
Technology Incorporated in the U.S.A.
Serialized Quick Turn Programming (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.
© 2002, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
Microchip received QS-9000 quality system
certification for its worldwide headquarters,
design and wafer fabrication facilities in
Chandler and Tempe, Arizona in July 1999
and Mountain View, California in March 2002.
The Company’s quality system processes and
procedures are QS-9000 compliant for its
PICmicro
®
8-bit MCUs, K
EE
L
OQ
®
code hopping
devices, Serial EEPROMs, microperipherals,
non-volatile memory and analog products. In
addition, Microchip’s quality system for the
design and manufacture of development
systems is ISO 9001 certified.
DS41159B - page ii
Preliminary
2002 Microchip Technology Inc.
M
PIC18FXX8
Advanced Analog Features:
• 10-bit, up to 8-channel Analog-to-Digital Converter
module (A/D) with:
- Conversion available during SLEEP
- Up to 8 channels available
• Analog Comparator Module:
- Programmable input and output multiplexing
• Comparator Voltage Reference Module
• Programmable Low Voltage Detection (LVD) module
- Supports interrupt on low voltage detection
• Programmable Brown-out Reset (BOR)
High Performance, 28/40-Pin Enhanced FLASH
Microcontrollers with CAN
High Performance RISC CPU:
• Linear program memory addressing up to
2 Mbytes
• Linear data memory addressing to 4 Kbytes
• Up to 10 MIPs operation
• DC - 40 MHz clock input
• 4 MHz - 10 MHz osc./clock input with PLL active
• 16-bit wide instructions, 8-bit wide data path
• Priority levels for interrupts
• 8 x 8 Single Cycle Hardware Multiplier
Peripheral Features:
• High current sink/source 25 mA/25 mA
• Three external interrupt pins
• Timer0 module: 8-bit/16-bit timer/counter with
8-bit programmable prescaler
• Timer1 module: 16-bit timer/counter
• Timer2 module: 8-bit timer/counter with 8-bit
period register (time-base for PWM)
• Timer3 module: 16-bit timer/counter
• Secondary oscillator clock option - Timer1/Timer3
• Capture/Compare/PWM (CCP) modules CCP
pins can be configured as:
- Capture input: 16-bit, max resolution 6.25 ns
- Compare: 16-bit, max resolution 100 ns (T
CY
)
- PWM output: PWM resolution is 1- to 10-bit
Max. PWM freq. @:8-bit resolution = 156 kHz
10-bit resolution = 39 kHz
• Enhanced CCP module which has all the features
of the standard CCP module, but also has the
following features for advanced motor control:
- 1, 2, or 4 PWM outputs
- Selectable PWM polarity
- Programmable PWM deadtime
• Master Synchronous Serial Port (MSSP) with two
modes of operation:
- 3-wire SPI™ (Supports all 4 SPI modes)
- I
2
C™ Master and Slave mode
• Addressable USART module: Supports Interrupt
on Address bit
CAN bus Module Features:
• Message bit rates up to 1 Mbps
• Conforms to CAN 2.0B ACTIVE Spec with:
- 29-bit Identifier Fields
- 8-byte message length
- 3 Transmit Message Buffers with prioritiza-
tion
- 2 Receive Message Buffers
- 6 full 29-bit Acceptance Filters
- Prioritization of Acceptance Filters
- Multiple Receive Buffers for High Priority
Messages to prevent loss due to overflow
- Advanced Error Management Features
Special Microcontroller Features:
• Power-on Reset (POR), Power-up Timer (PWRT),
and Oscillator Start-up Timer (OST)
• Watchdog Timer (WDT) with its own on-chip RC
oscillator
• Programmable code protection
• Power saving SLEEP mode
• Selectable oscillator options, including:
- 4X Phase Lock Loop (of primary oscillator)
- Secondary Oscillator (32 kHz) clock input
• In-Circuit Serial Programming
TM
(ICSP
TM
) via two pins
FLASH Technology:
•
•
•
•
Low power, high speed Enhanced FLASH technology
Fully static design
Wide operating voltage range (2.0V to 5.5V)
Industrial and Extended temperature ranges
2002 Microchip Technology Inc.
Preliminary
DS41159B-page 1
Robotics Development
京公网安备 11010802033920号
EEWORLD
