Instrukcja obsługi Microchip PIC24FJ64GA202

Microchip Niesklasyfikowane PIC24FJ64GA202

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Compiled Tips ‘N Tricks Guide

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and may be superseded by updates.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.

Trademarks

The Microchip name and logo, the Microchip logo, Accuron,

dsPIC, KEE EELOQ, K LOQ logo, MPLAB, PIC, PICmicro,

PICSTART, rfPIC, SmartShunt and UNI/O are registered

trademarks of Microchip Technology Incorporated in the

U.S.A. and other countries.

FilterLab, Hampshire, Linear Active Thermistor, MXDEV,

MXLAB, 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, dsSPEAK, ECAN,

ECONOMONITOR, FanSense, In-Circuit Serial

Programming, ICSP, ICEPIC, Mindi, MiWi, MPASM, MPLAB

Certified logo, MPLIB, MPLINK, mTouch, nanoWatt XLP,

PICkit, PICDEM, PICDEM.net, PICtail, PIC32 logo, PowerCal,

PowerInfo, PowerMate, PowerTool, REAL ICE, rfLAB, Select

Mode, Total Endurance, TSHARC, 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.

Printed on recycled paper.

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 co ng the code protection features ofmmitted to continuously improvi 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.

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.

8-pin Flash PIC

Microcontroller Tips ‘n Tricks

Tips ‘n Tricks

TABLE OF CONTENTS

8-pin Flash PIC® Microcontrollers

Tips ‘n Tricks

TIPS ‘N TRICKS WITH HARDWARE

TIP #1: Dual Speed RC Oscillator .......................... 1-2

TIP #2: Input/Output Multiplexing............................ 1-2

TIP #3: Read Three States From One Pin .............. 1-3

TIP #4: Reading DIP Switches ................................ 1-3

TIP #5: Scanning Many Keys With One Input......... 1-4

TIP #6: Scanning Many Keys and Wake-up

From Sleep ................................................. 1-4

TIP #7: 8x8 Keyboard with 1 Input .......................... 1-5

TIP #8: One Pin Power/Data................................... 1-5

TIP #9: Decode Keys and ID Settings .................... 1-6

TIP #10: Generating High Voltages .......................... 1-6

TIP #11: V Self Starting Circuit ............................. 1-7dd

TIP #12: Using PIC

MCU A/D For Smart

Current Limiter............................................ 1-7

TIP #13: Reading A Sensor With Higher Accuracy ... 1-8

TIP #13.1: Reading A Sensor With Higher

Accuracy – RC Timing Method ................... 1-8

TIP #13.2: Reading A Sensor With Higher

Accuracy – Charge Balancing Method .......1-10

TIP #13.3: Reading A Sensor With Higher

Accuracy – A/D Method ..............................1-11

TIP #14: Delta Sigma Converter ...............................1-11

TIPS ‘N TRICKS WITH SOFTWARE

TIP #15: Delay Techniques .......................................1-12

TIP #16: Optimizing Destinations..............................1-13

TIP #17: Conditional Bit Set/Clear ............................1-13

TIP #18: Swap File Register with W .........................1-14

TIP #19: Bit Shifting Using Carry Bit .........................1-14

PIC® Microcontroller Low Power

Tips ‘n Tricks

GENERAL LOW POWER TIPS ‘N TRICKS

TIP #1 Switching Off External Circuits/

Duty Cycle .................................................. 2-2

TIP #2 Power Budgeting ........................................ 2-3

TIP #3 Conguring Port Pins ................................. 2-4

TIP #4 Use High-Value Pull-Up Resistors .............. 2-4

TIP #5 Reduce Operating Voltage ......................... 2-4

TIP #6 Use an External Source for

CPU Core Voltage ...................................... 2-5

TIP #7 Battery Backup for PIC MCUs ................... 2-6

DYNAMIC OPERATION TIPS ‘N TRICKS

TIP #8 Enhanced PIC16 Mid-Range Core ............. 2-6

TIP #9 Two-Speed Start-Up ................................... 2-7

TIP #10 Clock Switching .......................................... 2-7

TIP #11 Use Internal RC Oscillators ........................ 2-7

TIP #12 Internal Oscillator Calibration ..................... 2-8

TIP #13 Idle and Doze Modes ................................. 2-8

TIP #14 Use and Idle Mode .............................. 2-9NOP

TIP #15 Peripheral Module Disable

(PMD) Bits .................................................. 2-9

STATIC POWER REDUCTION TIPS ‘N TRICKS

TIP #16 Deep Sleep Mode.......................................2-10

TIP #17 Extended WDT and Deep

Sleep WDT .................................................2-10

TIP #18 Low Power Timer1 Oscillator and RTCC ....2-10

TIP #19 Low Power Timer1 Oscillator Layout ..........2-11

TIP #20 Use LVD to Detect Low Battery ..................2-11

TIP #21 Use Peripheral FIFO and DMA...................2-11

TIP #22 Ultra Low-Power

Wake-Up Peripheral ...................................2-12

PIC® Microcontroller CCP and ECCP

Tips ‘n Tricks

CAPTURE TIPS ‘N TRICKS

TIP #1: Measuring the Period of a Square Wave ... 3-3

TIP #2: Measuring the Period of a

Square Wave with Averaging ..................... 3-3

TIP #3: Measuring Pulse Width .............................. 3-4

TIP #4: Measuring Duty Cycle ................................ 3-4

TIP #5: Measuring RPM Using an Encoder ............ 3-5

TIP #6: Measuring the Period of an Analog Signal 3-6 .

COMPARE TIPS ‘N TRICKS

TIP #7: Periodic Interrupts ...................................... 3-8

TIP #8: Modulation Formats.................................... 3-9

TIP #9: Generating the Time Tick for a RTOS ........3-10

TIP #10: 16-Bit Resolution PWM ..............................3-10

TIP #11: Sequential ADC Reader .............................3-11

TIP #12: Repetitive Phase Shifted Sampling ............3-12

PWM TIPS ‘N TRICKS

TIP #13: Deciding on PWM Frequency.....................3-14

TIP #14: Unidirectional Brushed DC

Motor Control Using CCP ...........................3-14

TIP #15: Bidirectional Brushed DC

Motor Control Using ECCP ........................3-15

TIP #16: Generating an Analog Output .....................3-16

TIP #17: Boost Power Supply ...................................3-17

TIP #18: Varying LED Intensity .................................3-18

TIP #19: Generating X-10 Carrier Frequency ...........3-18

COMBINATION CAPTURE AND COMPARE TIPS

TIP #20: RS-232 Auto-baud ......................................3-19

TIP #21: Dual-Slope Analog-to-Digital Converter .....3-21

Specyfikacje produktu

Marka:	Microchip
Kategoria:	Niesklasyfikowane
Model:	PIC24FJ64GA202

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