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    LCD USING PIC16F877 Search Results

    LCD USING PIC16F877 Result Highlights (5)

    Part ECAD Model Manufacturer Description Download Buy
    UPD78F0362GB-UEU-A Renesas Electronics Corporation Compact, Low-power 8-bit Microcontrollers for Applications Using LCD Display (Non Promotion) Visit Renesas Electronics Corporation
    UPD78F0374GC-UBT-A Renesas Electronics Corporation Compact, Low-power 8-bit Microcontrollers for Applications Using LCD Display (Non Promotion) Visit Renesas Electronics Corporation
    UPD78F0383GC-UBT-A Renesas Electronics Corporation Compact, Low-power 8-bit Microcontrollers for Applications Using LCD Display (Non Promotion) Visit Renesas Electronics Corporation
    UPD78F0393GC-8EA-A Renesas Electronics Corporation Compact, Low-power 8-bit Microcontrollers for Applications Using LCD Display (Non Promotion) Visit Renesas Electronics Corporation
    UPD78F0397GC-8EA-A Renesas Electronics Corporation Compact, Low-power 8-bit Microcontrollers for Applications Using LCD Display (Non Promotion) Visit Renesas Electronics Corporation

    LCD USING PIC16F877 Datasheets Context Search

    Catalog Datasheet MFG & Type PDF Document Tags

    graphic lcd interface with pic16f877

    Abstract: ampire 128 64 graphic LCD ag12864C Ampire 12864c c code DOT LED MATRIX pic 4 digit 7 segment display pic16f877 scrolling led display circuit using pic micro controller 16F84 LCD Ampire 128 SAMSUNG LCD GRAPHIC DISPLAY MODULE
    Text: USING THE PICBASIC Plus! COMPILER WITH GRAPHICS LCD DISPLAYs Version 1.0 Crownhill PIC BASIC Plus compiler - for the 14-bit range of PIC micros www.letbasic.com PICBASIC PLUS Compiler 5.50. PRINT Syntax : PRINT Item { , Item. } Overview : Send Text to an LCD module using the Hitachi 44780 controller or a


    Original     		PDF 14-bit S6B0108 S6B0108 S6B0107 COM128 S6B0108) graphic lcd interface with pic16f877 ampire 128 64 graphic LCD ag12864C Ampire 12864c c code DOT LED MATRIX pic 4 digit 7 segment display pic16f877 scrolling led display circuit using pic micro controller 16F84 LCD Ampire 128 SAMSUNG LCD GRAPHIC DISPLAY MODULE

    PIC16F877 Free Projects

    Abstract: PIC16F877 programmer circuit PIC16F877 Projects PIC16F877 interfacing circuit PICBASIC 4mhz crystal to pic16f877 PIC16F877 interfacing with lcd PIC16F877 PIC16F877 Free Projects temperature sensor ir thermometer sensor
    Text: LAB-X1 Experimenter Board - Super fast development with PIC16F877 Page 1 of 1 The LAB-X1 is microEngineering Labs, Inc.'s first pre-assembled experimenter's platform. While PICProto boards allow you to create your own projects with a minimum of hassle, the LAB-X1 goes


    Original     		PDF PIC16F877 10MHz, 12MHz, 32MHz, 16MHz 20MHz. PIC16F877 Free Projects PIC16F877 programmer circuit PIC16F877 Projects PIC16F877 interfacing circuit PICBASIC 4mhz crystal to pic16f877 PIC16F877 interfacing with lcd PIC16F877 PIC16F877 Free Projects temperature sensor ir thermometer sensor

    interfacing of PIC16F877A with 2X16 lcd

    Abstract: P16F877A PIC16F877A 2x16 LCD zero crossing detector PIC dimmer interfacing PIC16F877A with lcd pic microcontroller triac control x10 pic an236 2X16 lcd module pic16f84 PIC16F877A using temperature sensor PIC16F877a instruction clock timing diagram
    Text: AN236 X-10 Home Automation Using the PIC16F877A Author: HARDWARE OVERVIEW Jon Burroughs Microchip Technology Inc. The home controller application described in this application note allows the user to program on and off times for up to sixteen devices, using a 2 x 16 liquid crystal


    Original     		PDF AN236 PIC16F877A D-85737 DS00236A-page interfacing of PIC16F877A with 2X16 lcd P16F877A PIC16F877A 2x16 LCD zero crossing detector PIC dimmer interfacing PIC16F877A with lcd pic microcontroller triac control x10 pic an236 2X16 lcd module pic16f84 PIC16F877A using temperature sensor PIC16F877a instruction clock timing diagram

    PIC Light Dimmer

    Abstract: x10 pic an236 zero crossing detector PIC dimmer TRIAC dimmer pic PIC18F452 PWM example codes interfacing of PIC16F877A with 2X16 lcd pic triac PIC16F877A 2x16 LCD PWM GENERATION using Pic16F877A PIC16F877A circuit diagram
    Text: AN236 X-10 Home Automation Using the PIC16F877A Author: HARDWARE OVERVIEW Jon Burroughs Microchip Technology Inc. The home controller application described in this application note allows the user to program on and off times for up to sixteen devices, using a 2 x 16 liquid crystal


    Original     		PDF AN236 PIC16F877A DS00236B-page PIC Light Dimmer x10 pic an236 zero crossing detector PIC dimmer TRIAC dimmer pic PIC18F452 PWM example codes interfacing of PIC16F877A with 2X16 lcd pic triac PIC16F877A 2x16 LCD PWM GENERATION using Pic16F877A PIC16F877A circuit diagram

    interfacing pic16f877a with ir sensors

    Abstract: PIC16F877A SPECIFICATIONS PIC16F72 interfacing with LCD PIC16F877A Microcontroller energy meter circuit interfacing PIC16F877A with lcd PIC16F877a SAMPLE C pwm program PIC16F877A pin lcd tutorial for pic16f877a PIC16F877A digital voltmeter pic
    Text: Utility Metering Design Solutions Complete Utility Metering Solutions Design Innovation in Gas, Water, Heat and Energy Meters Engineers face a variety of design challenges as they push new innovations within their own applications. In meter designs, innovation usually rests with increasing accuracy


    Original     		PDF DS01008A DS01008A* interfacing pic16f877a with ir sensors PIC16F877A SPECIFICATIONS PIC16F72 interfacing with LCD PIC16F877A Microcontroller energy meter circuit interfacing PIC16F877A with lcd PIC16F877a SAMPLE C pwm program PIC16F877A pin lcd tutorial for pic16f877a PIC16F877A digital voltmeter pic

    PIC16F877A connect to 16 pin LCD

    Abstract: PIC18F4520 LED pic16f690 connected with lcd PIC16F887 POTENTIOMETER ADC PIC16F877A circuit programmer PIC18f4520 adc LCD connection to pic16F877A PIC16F73 header file 40-pin ribbon lcd pic16f684 LCD
    Text: THE KANDA PIC BOARD Introduction Here we will discuss the features of the Kanda PIC hardware, and how to use them. Device Support Here is a list of all the PIC devices that were in production at the time of development Dec 2011 . Many other PIC devices will work too – provided that


    Original     		PDF PIC12F683 PIC12F508 PIC12F609 PIC12F519 PIC12F509 PIC12F629 PIC12F635 PIC12F675 PIC12F510 PIC12F615 PIC16F877A connect to 16 pin LCD PIC18F4520 LED pic16f690 connected with lcd PIC16F887 POTENTIOMETER ADC PIC16F877A circuit programmer PIC18f4520 adc LCD connection to pic16F877A PIC16F73 header file 40-pin ribbon lcd pic16f684 LCD

    Z-Wave Application Programming Guide

    Abstract: GSM based remote water pump control system circuit diagram PIC16F877A Microcontroller energy meter circuit PIC16F877A advantages gsm based energy meter billing IEC1107 Digital Weighing Scale using PIC microcontroller prepaid energy meter block diagram GSM based home appliance control circuit diagram PIC Microcontroller GSM Modem
    Text: Introduction to Utility Metering Tutorial 2005 Microchip Technology Inc. DS39757A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF DS39757A DS39757A-page Z-Wave Application Programming Guide GSM based remote water pump control system circuit diagram PIC16F877A Microcontroller energy meter circuit PIC16F877A advantages gsm based energy meter billing IEC1107 Digital Weighing Scale using PIC microcontroller prepaid energy meter block diagram GSM based home appliance control circuit diagram PIC Microcontroller GSM Modem

    ADC IN PIC16F877

    Abstract: PIC16F877 APPLICATION NOTE schematic weigh scale low cost PT 100 sensor PIC18F4550 pic18f4550 mplab c18 project lcd PIC16F877 Programmer circuit diagram PIC16F877 weight scale PIC16F877 circuit diagram sensor for PIC16F877 microcontroller PIC16F877 i2c connection
    Text: MCP355X Sensor Application Developer’s Board User’s Guide 2006 Microchip Technology Inc. DS51609A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF MCP355X DS51609A DS51609A-page ADC IN PIC16F877 PIC16F877 APPLICATION NOTE schematic weigh scale low cost PT 100 sensor PIC18F4550 pic18f4550 mplab c18 project lcd PIC16F877 Programmer circuit diagram PIC16F877 weight scale PIC16F877 circuit diagram sensor for PIC16F877 microcontroller PIC16F877 i2c connection

    PIC16F877A pin

    Abstract: PIC16F877A Microcontroller PIC16F877A SPECIFICATIONS PIC16F877A PIN diagram PIC16F877A block diagram PWM using PIC16F877a c code PWM Inverter using PIC Microcontroller control dc motor speed using Pic16F877A PIC16F877A circuit diagram PIC16F877A connect to 16 pin LCD
    Text: MINI-MAX/PIC Single Board Computer Technical Manual Document Revision: 1.03 Date: 06 September 2004 BiPOM Electronics, Inc. 16301 Blue Ridge Road, Missouri City, Texas 77489 Telephone: 1-713-283-9970 Fax: 1-281-416-2806 E-mail: info@bipom.com Web: www.bipom.com


    Original     		PDF com/files/mm51c/loader/WinLoad MCP100 PIC16C58 PIC16F877A RS-232 PIC16F877A pin PIC16F877A Microcontroller PIC16F877A SPECIFICATIONS PIC16F877A PIN diagram PIC16F877A block diagram PWM using PIC16F877a c code PWM Inverter using PIC Microcontroller control dc motor speed using Pic16F877A PIC16F877A circuit diagram PIC16F877A connect to 16 pin LCD

    01146B

    Abstract: induction cooker schematic diagram zero crossing detector PIC dimmer PIC16F877 stepper motor interfacing schematic diagram induction cooker dc motor drive circuit pic16f877a sine wave inverter using pic PID control SMPS PIC Sine Wave Generator using pic16f877a three phase BLDC motor PIC mosfet driver
    Text: Compiled Tips ‘N Tricks Guide 2009 Microchip Technology Inc. DS01146B Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. •


    Original     		PDF DS01146B is36-4803 01146B induction cooker schematic diagram zero crossing detector PIC dimmer PIC16F877 stepper motor interfacing schematic diagram induction cooker dc motor drive circuit pic16f877a sine wave inverter using pic PID control SMPS PIC Sine Wave Generator using pic16f877a three phase BLDC motor PIC mosfet driver

    PIC16F73 Free Projects of interface with lcd

    Abstract: 16F877A microcontroller interfacing with lcd pic16f877a projects PIC16F877 Free Projects PIC16F877 Free Projects of lcd keyboard lcd display in pic16f73 free projects for PIC 16f877A PIC16F73 programmer circuit diagram PIC16F877A serial port assembly programming interfacing PIC16F877A with lcd
    Text: E-blocksTM USB232 board Document code: EB039-30-1 USB232 board EB039-00-1 Technical datasheet Contents 1. 2. 3. 4. 5. About this document .2


    Original     		PDF USB232 EB039-30-1 EB039-00-1 C16F777 PIC16C745 PIC16F870/1 PIC16C765 PIC16F873/A PIC16C77 PIC16F73 Free Projects of interface with lcd 16F877A microcontroller interfacing with lcd pic16f877a projects PIC16F877 Free Projects PIC16F877 Free Projects of lcd keyboard lcd display in pic16f73 free projects for PIC 16f877A PIC16F73 programmer circuit diagram PIC16F877A serial port assembly programming interfacing PIC16F877A with lcd

    PIC robot

    Abstract: zx-03 reflector ZX-03 obstacle detection robot ic L293D pic16f877 pwm assembly program control dc motor speed using Pic16F877 PIC16F877 interfacing with lcd pic16f877 code asm pwm pic16f877 pwm servo motor
    Text: Robot experiment with PIC microcontrollerl1 Robot experiment with PIC microcontroller based-on Robo-PICA robot kit C Innovative Experiment Co.,Ltd. 2lRobot experiment with PIC microcontroller Contents Chapter 1 Part list of Robo-PICA and Introduce software tools.5


    Original     		PDF RBX-877 PIC16F877 P14-1 PIC robot zx-03 reflector ZX-03 obstacle detection robot ic L293D pic16f877 pwm assembly program control dc motor speed using Pic16F877 PIC16F877 interfacing with lcd pic16f877 code asm pwm pic16f877 pwm servo motor

    PIC16F877 SAMPLE C PROJECTS

    Abstract: PIC16F877 APPLICATION NOTE PIC16F877A Microcontroller PIC16F877A Free Projects of LED PIC16F877 Data Logger 2.5mm DC power jack PIC16F877 Free Projects PIC16F877 Free Projects temperature sensor vending machine pic16f877 interfacing PIC16F877A with lcd
    Text: MCP215X Data Logger Demo Board User’s Guide  2004 Microchip Technology Inc. DS51516A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF MCP215X DS51516A per334-8870 DS51516A-page PIC16F877 SAMPLE C PROJECTS PIC16F877 APPLICATION NOTE PIC16F877A Microcontroller PIC16F877A Free Projects of LED PIC16F877 Data Logger 2.5mm DC power jack PIC16F877 Free Projects PIC16F877 Free Projects temperature sensor vending machine pic16f877 interfacing PIC16F877A with lcd

    pic16c628

    Abstract: PIC16F877 Free Projects Free Projects of PIC 16F84A 3.2768MHz Crystal PIC16F877 Free Projects with assembly language PIC16F877 Projects with assembly language 16F84 LCD PIC16F877 Free Projects temperature sensor flowcode PIC16c627
    Text: Version 2 PICmicro microcontroller development board The World’s most advanced solution for learning and programming PICmicro microcontrollers matrix multimedia 2 1 16 PPP programming utility 24 9 4 3 13 12 21 23 10 14 17 15 20 18 25 19 5 8 7 6 22 11 Sampler CD ROM


    Original     		PDF 16F84, 16F84A, PIC16C620, PIC16C620A, PIC16CR620A, PIC16C621, PIC16C621A, PIC16C622, PIC16C622A, PIC16CE623, pic16c628 PIC16F877 Free Projects Free Projects of PIC 16F84A 3.2768MHz Crystal PIC16F877 Free Projects with assembly language PIC16F877 Projects with assembly language 16F84 LCD PIC16F877 Free Projects temperature sensor flowcode PIC16c627

    vending machine pic microcontroller

    Abstract: PIC16F877a SAMPLE C ir sensor counter program pic16f877a projects PIC16F877A connect to 16 pin LCD EMBEDDED C BOOKS IN PIC16F877A PIC16F877A pic16f877a manual vending machine schematic diagram PIC16F877a Programmer circuit diagram Projects and Circuits for Data Logger
    Text: MCP215X/40 Data Logger Demo Board User’s Guide 2006 Microchip Technology Inc. DS51516B Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF MCP215X/40 DS51516B DS51516B-page vending machine pic microcontroller PIC16F877a SAMPLE C ir sensor counter program pic16f877a projects PIC16F877A connect to 16 pin LCD EMBEDDED C BOOKS IN PIC16F877A PIC16F877A pic16f877a manual vending machine schematic diagram PIC16F877a Programmer circuit diagram Projects and Circuits for Data Logger

    I8051

    Abstract: 16f84* max232 7805C1 2 digit 7 segment display pic16f877 m/L.E.D Moving Display Board
    Text: EASY PIC 2 MikroElektronika Tools-C Compilers-B Books www.mikroelektronika.co.yu Development tool for Microchip PIC MCUs About EasyPIC2: System supports 8,14, 18, 28, and 40-pin microcontrollers Each jumper, element and pin is clearly marked on the board. Most of the industrial


    Original     		PDF 40-pin MC68HC11, i8051, I8051 16f84* max232 7805C1 2 digit 7 segment display pic16f877 m/L.E.D Moving Display Board

    PIC16F887 Free Projects

    Abstract: PIC18F45k20 examples PIC16F628A Free Projects of LED pwm liquid level alarm using pic16f877a PIC16F877A ultrasonic sensor keypad 4x4 c code for pic16f887 PIC16F72 ups SOURCE CODE PIC16f877a c code for ethernet module enc28j60 RS-485 PIC16f688 example code digital blood pressure circuit using pic
    Text: 8-Bit PIC Microcontrollers Fall 2008 8-bit PIC® Microcontrollers www.microchip.com/8bit Did you know? – Microchip Technology is the #1 supplier of 8-bit microcontrollers worldwide. In fact, we’ve recently surpassed 6 billion devices shipped – That’s one PIC® microcontroller for every person on earth!


    Original     		PDF DS39630F DS39630E* PIC16F887 Free Projects PIC18F45k20 examples PIC16F628A Free Projects of LED pwm liquid level alarm using pic16f877a PIC16F877A ultrasonic sensor keypad 4x4 c code for pic16f887 PIC16F72 ups SOURCE CODE PIC16f877a c code for ethernet module enc28j60 RS-485 PIC16f688 example code digital blood pressure circuit using pic

    7x5 dot matrix led displays

    Abstract: arduino uno ASM117 28BYJ-48 mg995 ASM117-3 28BYJ48 4x4 matrix keypad in pic with c code PIC16F877A manual PIC 24C16
    Text: PPIC IC DDevelopment Board Ultra 2 IC + Arduino UNO USER'S GUIDE WIDE.HK page 2 PIC Development Board Ultra 2 Table of content Introduction Connectivity Introduction to PIC . . . . . . . . . . . . . . . . . . . . . . . . . . . .03 PIC sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .


    Original     		PDF WU-003 ILI9325 WU-005 WU-007 28BYJ-48 WU-004 KS0108 128x64 WU-006 MG995 7x5 dot matrix led displays arduino uno ASM117 ASM117-3 28BYJ48 4x4 matrix keypad in pic with c code PIC16F877A manual PIC 24C16

    control dc motor using Pic16F877A

    Abstract: control dc motor speed using Pic16F877A interfacing PIC16F877A with lcd dc motor drive circuit pic16f877a x10 pic an236 PIC16F877A keypad interfacing microchip AN857 Dc motor speed Controlled with Pic16F877A PIC16F877A Microcontroller PIC18 example codes lcd
    Text: Home Appliance Solutions Electronic Solutions for Today’s Appliance Designers • • • 8-bit PIC Microcontrollers Analog Peripherals Interface Products User Interface • Touch Pads • Bar Codes • Key Pads • LED • LCD Basic Control • Clocks and Timers


    Original     		PDF 16-bit DS00241A QS-9000 control dc motor using Pic16F877A control dc motor speed using Pic16F877A interfacing PIC16F877A with lcd dc motor drive circuit pic16f877a x10 pic an236 PIC16F877A keypad interfacing microchip AN857 Dc motor speed Controlled with Pic16F877A PIC16F877A Microcontroller PIC18 example codes lcd

    16F877A microcontroller interfacing with lcd

    Abstract: schematic diagram receiver data circuit satellite AVR GPS interfacing code in c PIC16F877A assembly programming for rs232 free pic16f877a gps schematic diagram PIC16F877A assembly with lcd Gps circuit diagram PIC16F877A circuit diagram pic16f877a manual
    Text: E-blocks GPS board Document code: EB045-30-1 GPS board datasheet EB045-00-1 Contents 1. 2. 3. 4. 5. About this document . 2


    Original     		PDF EB045-30-1 EB045-00-1 EB045 16F877A microcontroller interfacing with lcd schematic diagram receiver data circuit satellite AVR GPS interfacing code in c PIC16F877A assembly programming for rs232 free pic16f877a gps schematic diagram PIC16F877A assembly with lcd Gps circuit diagram PIC16F877A circuit diagram pic16f877a manual

    PIC16F946

    Abstract: DS41244 pic16f926 DS41265A PIC16F877 LED project with assembly language PIC18F1320 LCD the PIC Mid-Range Reference Manual DS33023 16 DS00594 SE22 sensor PIC Mid-Range Reference Manual DS33023
    Text: PIC16F946 Data Sheet 64-Pin Flash-Based, 8-Bit CMOS Microcontrollers with LCD Driver and nanoWatt Technology 2005 Microchip Technology Inc. Preliminary DS41265A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet.


    Original     		PDF PIC16F946 64-Pin DS41265A DS41265A-page PIC16F946 DS41244 pic16f926 DS41265A PIC16F877 LED project with assembly language PIC18F1320 LCD the PIC Mid-Range Reference Manual DS33023 16 DS00594 SE22 sensor PIC Mid-Range Reference Manual DS33023

    temperature sensor using pic 16f877

    Abstract: analog to digital converter for pic 16f877 with sample c code DOT LED MATRIX pic 16F877 sample programs with lcd graphic lcd interface with pic16f877 16f877 exaMPLE spi 16F877 sample sound display lcd 4x20 short notes 16F877 quadrature shaft encoder
    Text: Revision 2 @C ECHELON orporation 078-0191-01B Echelon, LON, LonTalk, LonBuilder, NodeBuilder, Neuron, LonManager, LONMARK, LONW ORKS, 3120, and 3150 are registered trademarks of Echelon Corporation. LonMaker, ShortStack, and i.LON are trademarks of Echelon Corporation.


    Original     		PDF 078-0191-01B temperature sensor using pic 16f877 analog to digital converter for pic 16f877 with sample c code DOT LED MATRIX pic 16F877 sample programs with lcd graphic lcd interface with pic16f877 16f877 exaMPLE spi 16F877 sample sound display lcd 4x20 short notes 16F877 quadrature shaft encoder

    PIC 16F877 web server

    Abstract: 16F877 sample programs with lcd for info display temperature sensor using pic 16f877 vending machine pic microcontroller control dc motor speed using Pic16F877 16F877 sample programs PIC16F877 interrupt ccs compiler 16F877 sample programs with lcd pic 16f877 ic pin details 16F877 with can protocol
    Text: AN731 Embedding PICmicro Microcontrollers in the Internet Author: The application note presented here is based on the block diagram shown in Figure 1. It consists of the PIC16F87X microcontroller, the Seiko iChipTM S-7600A TCP/IP stack IC, and the ISOmodemTM


    Original     		PDF AN731 PIC16F87X S-7600A Si2400 Si3015 D-81739 PIC 16F877 web server 16F877 sample programs with lcd for info display temperature sensor using pic 16f877 vending machine pic microcontroller control dc motor speed using Pic16F877 16F877 sample programs PIC16F877 interrupt ccs compiler 16F877 sample programs with lcd pic 16f877 ic pin details 16F877 with can protocol

    16F877 sample programs with lcd for info display

    Abstract: PIC16F877 interrupt ccs compiler S7600 16F877 sample programs with lcd PIC16F877 i2c connection PIC16F877 Bootloader 16F877 sample programs 16F877 x10 pic16f876/PIC16F877 and serial port interfacing PIC16F877 interrupt PICC compiler
    Text: AN731 Embedding PICmicro Microcontrollers in the Internet Author: The application note presented here is based on the block diagram shown in Figure 1. It consists of the PIC16F87X microcontroller, the Seiko iChipTM S-7600A TCP/IP stack IC, and the ISOmodemTM


    Original     		PDF AN731 PIC16F87X S-7600A Si2400 Si3015 DS00731A-page 16F877 sample programs with lcd for info display PIC16F877 interrupt ccs compiler S7600 16F877 sample programs with lcd PIC16F877 i2c connection PIC16F877 Bootloader 16F877 sample programs 16F877 x10 pic16f876/PIC16F877 and serial port interfacing PIC16F877 interrupt PICC compiler