Please enter a valid full or partial manufacturer part number with a minimum of 3 letters or numbers

    ATMEL AT89C2051 MICROCONTROLLER Search Results

    ATMEL AT89C2051 MICROCONTROLLER Result Highlights (5)

    Part ECAD Model Manufacturer Description Download Buy
    LBAA0QB1SJ-295 Murata Manufacturing Co Ltd SX1262 MODULE WITH OPEN MCU Visit Murata Manufacturing Co Ltd
    TMP89FM82DUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/LQFP48-P-0707-0.50D Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS60BFG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/P-LQFP64-1414-0.80-002 Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS63BUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/P-LQFP52-1010-0.65-002 Visit Toshiba Electronic Devices & Storage Corporation
    TMP89FS62BUG Toshiba Electronic Devices & Storage Corporation 8-bit Microcontroller/Processing Performance Equivalent to a 16-bit MCU/P-LQFP44-1010-0.80-003 Visit Toshiba Electronic Devices & Storage Corporation

    ATMEL AT89C2051 MICROCONTROLLER Datasheets Context Search

    Catalog Datasheet MFG & Type Document Tags PDF

    MUX 74157

    Abstract: CMOS 4011 AT89C2051 MICROCONTROLLER cmos 4040 74157 mux Microcontroller - AT89C2051 instruction set WE Y1 P3_6 DAQS panel-meter Microcontroller AT89C2051
    Text: PC-Interfaced Data Acquisition System with the Atmel AT89C2051 Microcontroller Introduction The features of the Atmel AT89C2051 microcontroller offer the user the chance to achieve a very low-cost/performance data acquisition system DAQS for low-frequency applications.


    Original     		AT89C2051 AT89C2051 MUX 74157 CMOS 4011 AT89C2051 MICROCONTROLLER cmos 4040 74157 mux Microcontroller - AT89C2051 instruction set WE Y1 P3_6 DAQS panel-meter Microcontroller AT89C2051 PDF

    lcd interface with at89c2051

    Abstract: digital thermometer with atmel 8051 digital thermometer using 8051 AT89C2051 ic 8051 microcontroller thermometer LCD ASCII CODE c source code serial communication with AT89c2051 ATmel AT89C2051 AT89C2051 485 Thermometer clock LCD ic
    Text: A Digital Thermometer Using the AT89C2051 Microcontroller Introduction The system presented in this application note implements a simple digital thermometer that includes a built-in LCD and RS-485 communication port. It is designed around Atmel’s AT89C2051


    Original     		AT89C2051 RS-485 AT89C2051 DS1620 RS485 DS1620 lcd interface with at89c2051 digital thermometer with atmel 8051 digital thermometer using 8051 AT89C2051 ic 8051 microcontroller thermometer LCD ASCII CODE c source code serial communication with AT89c2051 ATmel AT89C2051 AT89C2051 485 Thermometer clock LCD ic PDF

    MC1408-7

    Abstract: HP5082-7300 mc1408-7 DAC Microcontroller AT89C2051 instruction set hp5082 7300 HP-5082-7300 AT89Cx051 ATmel AT89C2051 dac MC1408 mc14086
    Text: Analog-to-Digital Conversion Utilizing the AT89CX051 Microcontrollers The Atmel AT89C1051 and AT89C2051 microcontrollers feature on-chip Flash, low pin count, wide operating voltage range and an integral analog comparator. This application note describes two


    Original     		AT89CX051 AT89C1051 AT89C2051 AT89C2051 15-volt LF355B MC1408-7 HP5082-7300 mc1408-7 DAC Microcontroller AT89C2051 instruction set hp5082 7300 HP-5082-7300 ATmel AT89C2051 dac MC1408 mc14086 PDF

    HP5082-7300

    Abstract: mc1408-7 at89C2051 sample AT89CX051 hp5082-73 Microcontroller AT89C2051 instruction set mc1408 DAC HP-5082-7300 AT89C2051 LM336-2
    Text: Microcontroller Analog-to-Digital Conversion Utilizing the AT89CX051 Microcontrollers The Atmel AT89C1051 and AT89C2051 microcontrollers feature on-chip Flash, low pin count, wide operating voltage range and an integral analog comparator. This application note describes two


    Original     		AT89CX051 AT89C1051 AT89C2051 AT89C2051 15volt LF355B HP5082-7300 mc1408-7 at89C2051 sample hp5082-73 Microcontroller AT89C2051 instruction set mc1408 DAC HP-5082-7300 LM336-2 PDF

    HP5082-7300

    Abstract: HP5082-73 MC1408-7 led AT89c2051 mc14086 dac MC1408 MC14087 AT89c2051 Analog at89C2051 sample AT89Cx051
    Text: Microcontroller Analog-to-Digital Conversion Utilizing the AT89CX051 Microcontrollers The Atmel AT89C1051 and AT89C2051 microcontrollers feature on-chip Flash, low pin count, wide operating voltage range and an integral analog comparator. This application note describes two low-cost analog-todigital conversion techniques which utilize


    Original     		AT89CX051 AT89C1051 AT89C2051 AT89C1051 AT89C2051 15-volt LF355B HP5082-7300 HP5082-73 MC1408-7 led AT89c2051 mc14086 dac MC1408 MC14087 AT89c2051 Analog at89C2051 sample PDF

    digital clock using AT89C51

    Abstract: ic at89c51 digital clock programming AT89C51 digital clock using the Atmel AT89C51 at89c52 digital clock program for digital clock AT89C51 atmel 2051 AT89C51 INSTRUCTIONS SET at89c51 digital clock FOR AT89C51
    Text: Designing Boards with Atmel AT89C51, AT89C52, AT89C1051, and AT89C2051 for Writing Flash at In-Circuit Test Recent improvements in chips and testers have made it possible for the tester to begin taking over the role traditionally assigned to the PROM programmer. Instead of having a PROM programmer write nonvolatile memories


    Original     		AT89C51, AT89C52, AT89C1051, AT89C2051 Z18series AT89C AT89C1051/205252 digital clock using AT89C51 ic at89c51 digital clock programming AT89C51 digital clock using the Atmel AT89C51 at89c52 digital clock program for digital clock AT89C51 atmel 2051 AT89C51 INSTRUCTIONS SET at89c51 digital clock FOR AT89C51 PDF

    11.0592 CRYSTAL used in microcontroller at89c52

    Abstract: AT89C51 Crystal oscillator 12 MHz 7 segment use at89c2051 AT89C51 INSTRUCTIONS SET 11.0592 CRYSTAL used in microcontroller at89c51 p AT89C51 INSTRUCTION SET 11.0592 CRYSTAL used in microcontroller at89c51 clock 7 segment use at89c2051 AT89C2051 internal RAM memory map Microcontroller - AT89C2051 pin diagram
    Text: The information presented in this chapter is collected from the Microcontroller Architectural Overview, AT89C51, AT89LV51, AT89C52, AT89LV52, AT89C2051, and AT89C1051 data sheets of this book. The material has been selected and rearranged to form a quick and convenient reference for the programmers of Atmel’s microcontroller family of devices. This guide pertains specifically to the AT89C51, AT89LV51,


    Original     		AT89C51, AT89LV51, AT89C52, AT89LV52, AT89C2051, AT89C1051 AT89LV52. 11.0592 CRYSTAL used in microcontroller at89c52 AT89C51 Crystal oscillator 12 MHz 7 segment use at89c2051 AT89C51 INSTRUCTIONS SET 11.0592 CRYSTAL used in microcontroller at89c51 p AT89C51 INSTRUCTION SET 11.0592 CRYSTAL used in microcontroller at89c51 clock 7 segment use at89c2051 AT89C2051 internal RAM memory map Microcontroller - AT89C2051 pin diagram PDF

    ATABX051

    Abstract: MCS-51TM at89c2051 AT89C2051 footprint AT89C51 at89c51 programmers AT89Cx051 AT89Cx051 ain0 atmel at89c52 Microcontroller AT89C2051
    Text: ATABX051 Features • • • Compatible with 40-pin MCS-51  sockets Compatible with in-circuit-emulators with 40-pin sockets 32 Programmable I/O Lines or 15 Programmable I/O Lines Description 1 Atmel’s 20- to 40-pin adapter board is for use in designing AT89C1051/AT89C2051 systems.


    Original     		ATABX051 40-pin MCS-51TM AT89C1051/AT89C2051 ATABX051 20-pin 80C51 at89c2051 AT89C2051 footprint AT89C51 at89c51 programmers AT89Cx051 AT89Cx051 ain0 atmel at89c52 Microcontroller AT89C2051 PDF

    atmel AT89C52 PROGRAMMER

    Abstract: dataman s4 LEAP-U1 AT89C2051 PROGRAMMING INTERFACE ALL07 UNIVERSAL PROGRAMMER AND TESTER PAC DIP 40 GANGPRO 8 atmel 2051 AT89S53 for proteus labtool 48 at89s8252 Seprog
    Text: Programming Vendors Atmel Corporation works closely with major suppliers of programming equipment that support our family of Flash microcontrollers. Atmel has a program in place which certifies the programming vendors, and a complete list can be found on our Bulletin Board at 408 436-4309. This list will


    Original     		0515B-A FLEX-700 TUP-400 TUP-51F TUP-51F-PL AT89C52 AT89C2051 AT89C1051 atmel AT89C52 PROGRAMMER dataman s4 LEAP-U1 AT89C2051 PROGRAMMING INTERFACE ALL07 UNIVERSAL PROGRAMMER AND TESTER PAC DIP 40 GANGPRO 8 atmel 2051 AT89S53 for proteus labtool 48 at89s8252 Seprog PDF

    S4051

    Abstract: AT89S051 serial communication with AT89c2051 AT89c2051 Application Note AT89c2051 Analog AT89C2051 microcontroller interrupt AT89C2051 microcontroller interrupt timer code AT89C2051 microcontroller AT89S2051 AT89C2051 internal memory map
    Text: Migrating from AT89C2051/C4051 to AT89S2051/S4051 Flash Microcontrollers New Features • 8-bit Pulse-width Modulation • Enhanced UART Serial Port with Framing Error Detection and Automatic • • • • • • • • • Address Recognition On-chip Analog Comparator with Selectable Interrupt


    Original     		AT89C2051/C4051 AT89S2051/S4051 AT89S2051/S4051. S4051 AT89S051 serial communication with AT89c2051 AT89c2051 Application Note AT89c2051 Analog AT89C2051 microcontroller interrupt AT89C2051 microcontroller interrupt timer code AT89C2051 microcontroller AT89S2051 AT89C2051 internal memory map PDF

    atmel AT89C52 PROGRAMMER

    Abstract: flash programmer circuit for AT89c51 flash programmer circuit for AT89c2051 ALL07 UNIVERSAL PROGRAMMER AND TESTER PAC DIP 40 program for at89c51 Microcontroller - AT89C2051 AT89C2051 PROGRAMMING INTERFACE GANGPRO 8 LEAP-U1 atmel at89c52
    Text: Programmer Support Programming Vendors Atmel Corporation works closely with major suppliers of programming equipment that support our family of Flash microcontrollers. Atmel has a program in place which certifies the programming vendors, and a complete list can be found on our Bulletin


    Original     		Z1800 AT89C52 AT89C2051 AT89C1051 AT89C51 21Blevel atmel AT89C52 PROGRAMMER flash programmer circuit for AT89c51 flash programmer circuit for AT89c2051 ALL07 UNIVERSAL PROGRAMMER AND TESTER PAC DIP 40 program for at89c51 Microcontroller - AT89C2051 AT89C2051 PROGRAMMING INTERFACE GANGPRO 8 LEAP-U1 atmel at89c52 PDF

    AT89C51 microcontroller

    Abstract: sab8031a-p SAB8051A-P P8052AH SAB8051A MICROCONTROLLER AT89C51 datasheet i87C51 Microcontroller AT89C51 Microcontroller Cross-Reference P8032AH
    Text: Microcontroller Cross-Reference Guide Microcontroller Abbreviated Cross-Reference Guide Intel PART NUMBER i80C31 i80C51 i87C51 i80C52 i87C52 PACKAGE Atmel MCS-51 D P N S no program store 4 Kbytes of ROM & 128 bytes of RAM 4 Kbytes of EPROM & 128 bytes of RAM


    Original     		i80C31 i80C51 i87C51 i80C52 i87C52 MCS-51 AT89C51 AT89C52 AT89C51 microcontroller sab8031a-p SAB8051A-P P8052AH SAB8051A MICROCONTROLLER AT89C51 datasheet i87C51 Microcontroller AT89C51 Microcontroller Cross-Reference P8032AH PDF

    AT89c2051-24pu programmer

    Abstract: AT89C2051-24PU 89C2051 APPLICATIONS Microcontroller - AT89C2051 pin diagram 20 pin Atmel 89C2051 microcontroller 89C2051 AT89C2051-24SU atmel 89c2051 flash programmer circuit for AT89c2051 Microcontroller - AT89C2051 instruction set
    Text: Features • Compatible with MCS -51Products • 2K Bytes of Reprogrammable Flash Memory • • • • • • • • • • • • – Endurance: 10,000 Write/Erase Cycles 2.7V to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Two-level Program Memory Lock


    Original     		-51Products 16-bit AT89C2051 AT89C2051 0368H AT89c2051-24pu programmer AT89C2051-24PU 89C2051 APPLICATIONS Microcontroller - AT89C2051 pin diagram 20 pin Atmel 89C2051 microcontroller 89C2051 AT89C2051-24SU atmel 89c2051 flash programmer circuit for AT89c2051 Microcontroller - AT89C2051 instruction set PDF

    Microcontroller - AT89C2051 instruction set

    Abstract: Microcontroller - AT89C2051 pin diagram AT89C2051 MICRO CONTROLLER at89c2051-24pi AT89C2051 PROGRAMMING INTERFACE flash programmer circuit for AT89c2051 AT89C2051 circuit s pin diagram of at89c2051 pin diagram of AT89c2051 microcontroller Microcontroller - AT89C2051 idle mode
    Text: Features • Compatible with MCS -51Products • 2K Bytes of Reprogrammable Flash Memory • • • • • • • • • • • • – Endurance: 1,000 Write/Erase Cycles 2.7V to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Two-level Program Memory Lock


    Original     		-51Products 16-bit AT89C2051 AT89C2051 0368G Microcontroller - AT89C2051 instruction set Microcontroller - AT89C2051 pin diagram AT89C2051 MICRO CONTROLLER at89c2051-24pi AT89C2051 PROGRAMMING INTERFACE flash programmer circuit for AT89c2051 AT89C2051 circuit s pin diagram of at89c2051 pin diagram of AT89c2051 microcontroller Microcontroller - AT89C2051 idle mode PDF

    LP4052

    Abstract: serial communication with AT89c2051 AT89C2051 PWM GENERATOR AT89C2051 microcontroller interrupt timer code Microcontroller AT89C2051 pin function AT89C2051 timer application AT89C2051 PROGRAMMING INTERFACE AT89c2051 Analog AT89C2051 microcontroller interrupt AT89C2051 internal memory map
    Text: Migrating from AT89C2051/C4051 to AT89LP2052/LP4052 New Features • • • • • • • • • • • • • • • • • 20 MIPS throughput at 20 MHz Clock Frequency and 2.7V, 85° C Operating Conditions Single Clock Cycle per Byte Fetch Serial Interface for Program Downloading


    Original     		AT89C2051/C4051 AT89LP2052/LP4052 32-byte 16-bit 3573B LP4052 serial communication with AT89c2051 AT89C2051 PWM GENERATOR AT89C2051 microcontroller interrupt timer code Microcontroller AT89C2051 pin function AT89C2051 timer application AT89C2051 PROGRAMMING INTERFACE AT89c2051 Analog AT89C2051 microcontroller interrupt AT89C2051 internal memory map PDF

    19654F

    Abstract: Atmel MARKING CODE AT89C2051 program atmel package marking at89c2051 at89c2051 application 2213a02 ATmel AT89C2051 Atmel Package marking information 200H
    Text: This errata sheet is applicable to the following device: • AT89C2051 Problem In Rev. “E” of the AT89C2051 device, whenever the power-down mode is invoked, the ICC current can suddenly and permanently exceed values above the maximum specified in the datasheet. The actual amount of current displayed in an application which


    Original     		AT89C2051 AT89C2051 02/01/xM 19654F Atmel MARKING CODE AT89C2051 program atmel package marking at89c2051 application 2213a02 ATmel AT89C2051 Atmel Package marking information 200H PDF

    89C2051

    Abstract: CONTROLLER Microcontroller - AT89C2051 pin diagram flash programmer circuit for AT89c2051 ATmel AT89C2051 AT89C2051-24SI what is AT in AT89C2051 at89c2051 20 pin Atmel 89C2051 microcontroller pin diagram of 89c2051 microcontroller
    Text: Features • Compatible with MCS-51 Products • 2K Bytes of Reprogrammable Flash Memory • • • • • • • • • • • – Endurance: 1,000 Write/Erase Cycles 2.7V to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Two-level Program Memory Lock


    Original     		MCS-51TM 16-bit AT89C2051 0368E 02/00/xM 89C2051 CONTROLLER Microcontroller - AT89C2051 pin diagram flash programmer circuit for AT89c2051 ATmel AT89C2051 AT89C2051-24SI what is AT in AT89C2051 20 pin Atmel 89C2051 microcontroller pin diagram of 89c2051 microcontroller PDF

    Microcontroller - AT89C2051 pin diagram

    Abstract: pin configuration of 89c2051 Microcontroller - AT89C2051 instruction set flash programmer circuit for AT89c2051 89C2051 pin diagram of 89c2051 microcontroller 20 pin 89C2051 AT89C2051 PROGRAMMING INTERFACE AT89C2051 MICRO CONTROLLER atmel AT89C2051-24PI
    Text: Features • Compatible with MCS -51Products • 2K Bytes of Reprogrammable Flash Memory • • • • • • • • • • • • – Endurance: 1,000 Write/Erase Cycles 2.7V to 6V Operating Range Fully Static Operation: 0 Hz to 24 MHz Two-level Program Memory Lock


    Original     		-51Products 16-bit AT89C2051 AT89C2051 0368f Microcontroller - AT89C2051 pin diagram pin configuration of 89c2051 Microcontroller - AT89C2051 instruction set flash programmer circuit for AT89c2051 89C2051 pin diagram of 89c2051 microcontroller 20 pin 89C2051 AT89C2051 PROGRAMMING INTERFACE AT89C2051 MICRO CONTROLLER atmel AT89C2051-24PI PDF

    20 pin Atmel 89C2051 microcontroller

    Abstract: flash programmer circuit for AT89c2051 Atmel AT 2051 REAL TIME CLOCK using AT89C2051 led interface with 89C2051 20 pin 89C2051 AT89C2051 MICRO CONTROLLER AT89C2051 PROGRAMMING INTERFACE 2051 atmel atmel 89c2051 datasheet
    Text: Tools Support 8051 Family In-Circuit Emulator The EMUL51TM-PC is a high performance in-circuit emulator specifically designed to provide an optimal environment for 8051 family microcontroller hardware and software development. The EMUL51TM-PC consists of a board which plugs directly into


    Original     		EMUL51TM-PC EMUL51TM-PC RS-232 AT89C1051/2051 20-pin AS-20-2001S-6 20 pin Atmel 89C2051 microcontroller flash programmer circuit for AT89c2051 Atmel AT 2051 REAL TIME CLOCK using AT89C2051 led interface with 89C2051 20 pin 89C2051 AT89C2051 MICRO CONTROLLER AT89C2051 PROGRAMMING INTERFACE 2051 atmel atmel 89c2051 datasheet PDF

    20 pin Atmel 89C2051 microcontroller

    Abstract: AT89C2051 PROGRAMMING INTERFACE REAL TIME CLOCK using AT89C2051 Microcontroller - AT89C2051 pin function AT89C2051 internal memory map 2051-PD 2051 atmel 2051 89C2051 REAL TIME CLOCK WITH AT89C51
    Text: 8051 Family In-Circuit Emulator The EMUL51 -PC is a high performance in-circuit emulator specifically designed to provide an optimal environment for 8051 family microcontroller hardware and software development. The EMUL51-PC consists of a board which plugs directly into the IBM


    Original     		EMUL51TM-PC EMUL51-PC RS-232 EMUL51PC AT89C1051/2051 20-pin AS-20-20-01S-6 20 pin Atmel 89C2051 microcontroller AT89C2051 PROGRAMMING INTERFACE REAL TIME CLOCK using AT89C2051 Microcontroller - AT89C2051 pin function AT89C2051 internal memory map 2051-PD 2051 atmel 2051 89C2051 REAL TIME CLOCK WITH AT89C51 PDF

    MICROCONTROLLER AT89C51

    Abstract: AT8C51 Microcontroller AT8C51 smd code book ATmel AT89C2051 lock bit MICROCONTROLLER AT89 AT891051 AT89CS Atmel AT89C51 lock ATMEL CORPORATION
    Text: Atmel Corporation Microcontroller Data Book 1995 is the registered trademark of Atmel Corporation, 2125 O’Nel Drive, San Jose, CA 95131 Important Notice Atmel guarantees that its circuits will be free from defects of material and workmanship under normal use and service, and that these circuits will perform to current specifications in accordance


    Original     		29-ATMEL MICROCONTROLLER AT89C51 AT8C51 Microcontroller AT8C51 smd code book ATmel AT89C2051 lock bit MICROCONTROLLER AT89 AT891051 AT89CS Atmel AT89C51 lock ATMEL CORPORATION PDF

    atmel 628

    Abstract: AT89C2051 footprint AT89C2051 microcontroller 20 pin at89c2051 AT89C2051 Microcontroller AT89C2051 AT89C2051 20 pins MCS-51TM AT-89C2051 AT89Cx051
    Text: Features • Compatible with 40-pin MCS-51 sockets • Compatible with in-circuit-emulators with 40-pin sockets • 32 Programmable I/O Lines or 15 Programmable I/O Lines Description 1 Atmel's 20- to 40-pin adapter board is for use in designing AT89C1051/AT89C2051


    Original     		40-pin MCS-51TM AT89C1051/AT89C2051 ATABX051 20-pin 80C51 AT89C1051/AT89C2051 atmel 628 AT89C2051 footprint AT89C2051 microcontroller 20 pin at89c2051 AT89C2051 Microcontroller AT89C2051 AT89C2051 20 pins AT-89C2051 AT89Cx051 PDF

    4052 Primer

    Abstract: AT89C2051 microcontroller interrupt source and its vector address 7 segment use at89c2051 clock 7 segment use at89c2051 AT89ISP atmel 8051 sample code AT89S52 INSTRUCTION SET Microcontroller - AT89s52 AT25C040 serial communication with AT89c2051
    Text: AT89LP2052/4052 Primer 1. Introduction The Atmel AT89LP2052/4052 microcontroller is a low-power, high-performance device featuring an enhanced single-cycle 8051 CPU, 2K/4K bytes of Flash memory, 256 bytes of RAM, configurable I/O, an analog comparator, dual pulse width modulation PWM outputs, a UART, a Serial Peripheral Interface (SPI) and a watchdog


    Original     		AT89LP2052/4052 AT89C2051/4051 AT89C2051document 4052 Primer AT89C2051 microcontroller interrupt source and its vector address 7 segment use at89c2051 clock 7 segment use at89c2051 AT89ISP atmel 8051 sample code AT89S52 INSTRUCTION SET Microcontroller - AT89s52 AT25C040 serial communication with AT89c2051 PDF

    AT24C04 with AT89C2051

    Abstract: interfacing 24c04 with 8051 with lcd 74C922 IC 74c922 lcd interface with at89c2051 AT89C2051 microcontroller 20 pin ic i2c interfacing with 8051 Interfacing RTC using I2C protocol INTERFACING MEMORY WITH 8051 THROUGH I2C PROTOCOL 24C04 code example assembly
    Text: Two-Wire Peripheral Expansion for the AT89C2051 Microcontroller The attribute shared by most embedded controllers is their ability to interact with the outside world. While this fact is generally accepted, the form this I/O takes includes everything from parallel and bitaddressable digital I/O, analog I/O, as


    Original     		AT89C2051 AT24C04 with AT89C2051 interfacing 24c04 with 8051 with lcd 74C922 IC 74c922 lcd interface with at89c2051 AT89C2051 microcontroller 20 pin ic i2c interfacing with 8051 Interfacing RTC using I2C protocol INTERFACING MEMORY WITH 8051 THROUGH I2C PROTOCOL 24C04 code example assembly PDF