PIC16F946-I/PT

28/40/44/64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology

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in this publication regarding device applications and the like is provided only for your convenience and may be superseded by updates.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 WARRANTIES 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 devices in life support and/or safety applications is entirely at the buyer's risk, and the buyer agrees to defend, indemnify and hold harmless Microchip from any and all damages, claims, suits, or expenses resulting from such use. No licenses are conveyed, implicitly or otherwise, under any Microchip intellectual property rights.

The Microchip name and logo, the Microchip logo, Accuron, dsPIC, KEELOQ, KEELOQ logo, 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, Linear Active Thermistor, Migratable Memory, MXDEV, MXLAB, PS logo, 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, CodeGuard, dsPICDEM, dsPICDEM.net, dsPICworks, ECAN, ECONOMONITOR, FanSense, FlexROM, fuzzyLAB, In-Circuit Serial Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB Certified logo, MPLIB, MPLINK, 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.
© 2007, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.

Microchip received ISO/TS-16949:2002 certification for its worldwide headquarters, design and wafer fabrication facilities in Chandler and Tempe, Arizona; Gresham, Oregon and design centers in California and India. The Company's quality system processes and procedures are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® 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.

Only 35 instructions to learn: - All single-cycle instructions except branches
Operating speed: ­ 20 MHz oscillator/clock input 200 ns instruction cycle

Program Memory Read (PMR) capability Interrupt capability 8-level deep hardware stack Direct, Indirect and Relative Addressing modes

Precision Internal Oscillator: - Factory calibrated to ±1%, typical - Software selectable frequency range of 8 MHz to 125 kHz - Software tunable - Two-Speed Start-up mode - External Oscillator fail detect for critical applications - Clock mode switching during operation for power savings

Software selectable 31 kHz internal oscillator Power-Saving Sleep mode Wide operating voltage range (2.0V-5.5V) Industrial and Extended temperature range Power-on Reset (POR) Power-up Timer (PWRT) and Oscillator Start-up

Timer (OST) Brown-out Reset (BOR) with software control
option Enhanced Low-Current Watchdog Timer (WDT)

with on-chip oscillator (software selectable nominal 268 seconds with full prescaler) with software enable Multiplexed Master Clear with pull-up/input pin Programmable code protection High-Endurance Flash/EEPROM cell: - 100,000 write Flash endurance - 1,000,000 write EEPROM endurance - Flash/Data EEPROM retention: > 40 years

Operating Current: @ 32 kHz, 2.0V, typical @ 4 MHz, 2.0V, typical

- High-current source/sink for direct LED drive - Interrupt-on-change pin - Individually programmable weak pull-ups In-Circuit Serial ProgrammingTM (ICSPTM) via two pins Analog comparator module with: - Two analog comparators - Programmable on-chip voltage reference

(CVREF) module of VDD) - Comparator inputs and outputs externally

- 16-bit timer/counter with prescaler - External Timer1 Gate (count enable) - Option to use OSC1 and as Timer1

oscillator if INTOSCIO or LP mode is selected Timer2: 8-bit timer/counter with 8-bit period register, prescaler and postscaler Addressable Universal Synchronous Asynchronous Receiver Transmitter (AUSART) to 2 Capture, Compare, PWM modules: - 16-bit Capture, max. resolution - 16-bit Compare, max. resolution - 10-bit PWM, max. frequency 20 kHz Synchronous Serial Port (SSP) with I2CTM