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<title>Introduction to AT89C55WD Microcontroller Architecture Feautures Register mode-pinout Applications
Introduction AT89C55WD Microcontrollers:
The AT89C55WD is a low-power supply, high-performance CMOS 8-bit microcontroller with 20K bytes of Flash of the programmable read-only memory and 256 bytes of RAM. The device is manufactured using Atmel’s high-density of nonvolatile memory technology or is compatible with the industry standard 80C51 and 80C52 instruction set or pinout. The on-chip Flash allows the program of the memory to be user-programmed by a conventional nonvolatile memory of the programmer. By combining a versatile 8-bit CPU with Flash on a monolithic chip the Atmel AT89C55WD is a powerful microcomputer that provides a highly flexible or cost-effective solution to many embedded control applications.
The AT89C55WD provides the following standard of the features: 20K bytes of Flash, 256 bytes of RAM, 32 I/O lines, three 16-bit timers/counters, a 6-vector, 2-level interrupt architecture, a full-duplex serial port, an on-chip oscillator, and clock circuitry. In addition, the AT89C55WD is designed with static logic for operation of the down to zero frequency and supports two software-selectable power-saving modes. The Idle Mode stops the CPU while allowing the RAM, timer/counters, serial port, or interrupt system to continue functioning. The Power supply-down Mode saves the RAM contents but freezes the oscillator, disabling all other chip functions until the next external interrupt and hardware reset.
Spceifications:
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Program Memory Size: 20 kB
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Data Bus Width: 8 bit
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Maximum Clock Frequency: 24 MHz
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Data RAM Size: 256 B
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Supply Voltage - Min: 4 V
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Supply Voltage - Max: 5.5 V
AT89C55WD Microcontrollers Pinout Configuration:
1. AT27C2048-55JJ(pin-15): 128K X 16 OTPROM, 55 ns, PQCC44 Specifications: Memory Category: PROM; Density: 2097 bits; Number of Words: 128 k; Bits per Word: 16 bits; Package Type: PLASTIC, MS-018AC, LCC-44; Pins: 44; Logic Family: CMOS; Supply Voltage: 5V; Access Time: 55 ns; Operating Temperature: -40 to 85 C (-40 to 185 F)
2. AT28HC256-12LL (pin-16): 32K X 8 EEPROM 5V, 120 ns, CDIP28 Specifications: Density: 262 kbits ; Number of Words: 32 k ; Bits per Word: 8 bits ; Bus Type: Parallel ; Production Status: Full Production ; Access Time: 120 ns ; Logic Family: CMOS ; Supply Voltage: 5V ; Package Type: 0.600 INCH, CERDIP-28 ; Pins: 28 ; Operating Range: Industrial ; Operating Temp
3. AT89C1051U-24SJ(pin-18): 8-BIT, FLASH, 12 MHz, MICROCONTROLLER, PDIP20 Specifications: Life Cycle Stage: ACTIVE; Clock Speed: 12 MHz; ROM Type: Flash; Supply Voltage: 2.7 to 6 volts; I/O Ports: 15; Package Type: CDIP, Other, 0.300 INCH, PLASTIC, DIP-20; Operating Range: Industrial; Pin Count: 20; Operating Temperature: -40 to 85 C (-40 to 185 F)
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Circuit Operation:
AT89C55 89C55 AT89C55-24PI AT89C55-24PU AT89C55-24PC IC DIP-40 Microcontroller IC 8-Bit 24MHz 20KB Flash Memory Through Hole Integrated Circuits diagram MCU Chip. The AT89C55 is a low-power supply, high-performance CMOS 8-bit microcomputer with 20K bytes of Flash programmable or erasable read-only memory. The device is compatible with the industry standard 80C51 instruction set or pinout. It provides a highly flexible and cost-effective solution to many embedded control of the applications.AT89C55 is Compatible with MCS-51™ of the Products.
The AT89S52 is a low-power supply, high-performance CMOS 8-bit microcontroller with 8K bytes of in-system programmable Flash memory. The device is manufactured using Atmel’s high-density nonvolatile memory technology or is compatible with the industry-standard 80C51 instruction set and pinout. The on-chip Flash allows the program of the memory to be reprogrammed in-system or by a conventional nonvolatile memory programmer. By combining a versatile 8-bit CPU with an in-system programmable Flash on a monolithic chip, the Atmel AT89S52 is a powerful microcontroller that provides a highly flexible or cost-effective solution to many embedded controls of the applications.
An 8-bit microcontroller is a small computer that has been made to work like the brain of an 8-bit video game on the console. The controller can be programmed to do anything, but it needs instructions to know what to do. These instructions are called "code." For a microcontroller to function as it should, it needs code. This code is written in the C programming language and communicates with the components of a system or machine through its pins. The hardware of an 8-bit microcontroller consists of both analog and digital input and output pins. These pins are what allow the controller to interact with the environment around it.
Frequently Asked Questions
What are the features of PIC18F4520?
It is available in 3- packages: PDIP, QFN, or TQFP. The first is a 40-pin package (which is the most common), while the other 2- have a 44-pin interface. This microcontroller version has a CPU, timers, a 10-bit ADC, or other peripherals for developing connections with external.
What is a Microcontroller and How Does it Work?
A microcontroller is embedded inside a system to control a singular of function in a device. It does this by interpreting data it receives from its I/O peripherals the using its central processor.
What is a microcontroller and its features?
A microcontroller is a single integrated circuit diagram, commonly with the following features: central processing unit – ranging from small and simple four-bit processors to complex 32-bit or 64-bit processors. volatile memory (RAM) for data storage. ROM, EPROM, EEPROM, or Flash memory for program and operating parameter storage.
What are the applications of AT89C51?
To ensure that the display of the control lines is in a known state before they are latched, an AT89C51 external interrupt is used to allow the programmer to signal the application before asserting of the reset. The application firmware responds to the interrupt by displaying a message or deactivating the display control lines.
What is the data type of PIC microcontroller?
THE WREG REGISTER IN THE PIC PIC microcontrollers have many registers or the WREG register is used for arithmetic and logic operations. In the CPU, the registers which are 8 bit are used to store information temporarily. In the PIC there is only one data type 8-bit.
