AT89C51ED2-UM

Name: AT89C51ED2-UM
Rating: 4.5 (10 reviews)

Resistor Network, Array Isolated Through Hole 10 5 -55°C ~ 125°C 10-SIP ±2%

6,005 Effective Inventory

AT89C51ED2-UM

Effective Inventory6,005

Resistor Network, Array Isolated Through Hole 10 5 -55°C ~ 125°C 10-SIP ±2%

Manufacturer Part # : AT89C51ED2-UM
Package/Case: PLCC64
Brand: Microchip Technology
Product Categories : Microcontrollers

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AT89C51ED2-UM DataSheet

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Details

AT89C51RD2/ED2 is high performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller. It contains a 64-Kbyte Flash memory block for code and for data.The 64-Kbytes Flash memory can be programmed either in parallel mode or in serial mode with the ISP capability or with software. The programming voltage is internally generated from the standard VCC pin.The AT89C51RD2/ED2 retains all of the features of the Atmel 80C52 with 256 bytes of internal RAM, a 9-source 4-level interrupt controller and three timer/counters. The AT89C51ED2 provides 2048 bytes of EEPROM for nonvolatile data storage.In addition, the AT89C51RD2/ED2 has a Programmable Counter Array, an XRAM of 1792 bytes, a Hardware Watchdog Timer, SPI interface, Keyboard, a more versatile serial channel that facilitates multiprocessor communication (EUART) and a speed improvement mechanism (X2 Mode).The fully static design of the AT89C51RD2/ED2 allows to reduce system power consumption by bringing the clock frequency down to any value, including DC, without loss of data.The AT89C51RD2/ED2 has 2 software-selectable modes of reduced activity and an 8-bit clock prescaler for further reduction in power consumption. In the Idle mode the CPU is frozen while the peripherals and the interrupt system are still operating. In the Power-down mode the RAM is saved and all other functions are inoperative.The added features of the AT89C51RD2/ED2 make it more powerful for applications that need pulse width modulation, high speed I/O and counting capabilities such as alarms, motor control, corded phones, and smart card readers. Features• 80C52 Compatible– 8051 Instruction Compatible– Six 8-bit I/O Ports (64 Pins or 68 Pins Versions)– Four 8-bit I/O Ports (44 Pins Version)– Three 16-bit Timer/Counters– 256 Bytes Scratch Pad RAM– 9 Interrupt Sources with 4 Priority Levels• Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply• ISP (In-System Programming) Using Standard VCC Power Supply• 2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default Serial Loader• High-speed Architecture– In Standard Mode:• 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)• 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)– In X2 mode (6 Clocks/machine cycle)• 20 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution)• 30 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)• 64K Bytes On-chip Flash Program/Data Memory– Byte and Page (128 Bytes) Erase and Write– 100k Write Cycles• On-chip 1792 bytes Expanded RAM (XRAM)– Software Selectable Size (0, 256, 512, 768, 1024, 1792 Bytes)– 768 Bytes Selected at Reset for T89C51RD2 Compatibility• On-chip 2048 Bytes EEPROM Block for Data Storage (AT89C51ED2 Only)• 100K Write Cycles• Dual Data Pointer• Variable Length MOVX for Slow RAM/Peripherals• Improved X2 Mode with Independent Selection for CPUand Each Peripheral• Keyboard Interrupt Interface on Port 1• SPI Interface (Master/Slave Mode)• 8-bit Clock Prescaler• 16-bit Programmable Counter Array– High Speed Output– Compare/Capture– Pulse Width Modulator– Watchdog Timer Capabilities• Asynchronous Port Reset• Full-duplex Enhanced UART with Dedicated Internal Baud Rate Generator• Low EMI (Inhibit ALE)• Hardware Watchdog Timer (One-time Enabled with Reset-Out), Power-off Flag• Power Control Modes: Idle Mode, Power-down Mode• Single Range Power Supply: 2.7V to 5.5V• Industrial Temperature Range (-40 to +85°C)• Packages: PLCC44, VQFP44, PLCC68, VQFP64

Key Features

80C52 Compatible– 8051 Instruction Compatible– Six 8-bit I/O Ports (64 Pins or 68 Pins Versions)– Four 8-bit I/O Ports (44 Pins Version)– Three 16-bit Timer/Counters– 256 Bytes Scratch Pad RAM– 9 Interrupt Sources with 4 Priority Levels Integrated Power Monitor (POR/PFD) to Supervise Internal Power Supply ISP (In-System Programming) Using Standard VCC Power Supply 2048 Bytes Boot ROM Contains Low Level Flash Programming Routines and a Default Serial Loader High-speed Architecture– In Standard Mode: 40 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution) 60 MHz (Vcc 4.5V to 5.5V and Internal Code execution only)– In X2 mode (6 Clocks/machine cycle) 20 MHz (Vcc 2.7V to 5.5V, both Internal and external code execution) 30 MHz (Vcc 4.5V to 5.5V and Internal Code execution only) 64K Bytes On-chip Flash Program/Data Memory– Byte and Page (128 Bytes) Erase and Write– 100k Write Cycles On-chip 1792 bytes Expanded RAM (XRAM)– Software Selectable Size (0, 256, 512, 768, 1024, 1792 Bytes)– 768 Bytes Selected at Reset for T89C51RD2 Compatibility On-chip 2048 Bytes EEPROM Block for Data Storage (AT89C51ED2 Only) 100K Write Cycles Dual Data Pointer Variable Length MOVX for Slow RAM/Peripherals Improved X2 Mode with Independent Selection for CPUand Each Peripheral Keyboard Interrupt Interface on Port 1 SPI Interface (Master/Slave Mode) 8-bit Clock Prescaler 16-bit Programmable Counter Array– High Speed Output– Compare/Capture– Pulse Width Modulator– Watchdog Timer Capabilities Asynchronous Port Reset Full-duplex Enhanced UART with Dedicated Internal Baud Rate Generator Low EMI (Inhibit ALE) Hardware Watchdog Timer (One-time Enabled with Reset-Out), Power-off Flag Power Control Modes: Idle Mode, Power-down Mode Single Range Power Supply: 2.7V to 5.5V Industrial Temperature Range (-40 to +85°C) Packages: PLCC44, VQFP44, PLCC68, VQFP64

Specifications

The followings are basic parameters of the part selected concerning the characteristics of the part and categories it belongs to.

Manufacturer

Intel / Altera

Product Category !

IC Chips

Specification Comparison

AT89C51ED2-UM vs AT89C51RB2-RLTUM vs AT89C51RD2-CM AT89C51ED2-RLTIM vs AT89C51ED2-UM vs AT89C51ID2-RLTUM

Datasheet PDF

Datasheets record the features, absolute maximum ratings, applications and more of the device, which benefit a lot as an overall guide to the specific application of the part.

Preliminary Specification AT89C51ED2-UM PDF Download

FAQs

What is AT89C51ED2-UM?

The AT89C51ED2-UM is a high-performance Flash version of the 80C51 single-chip 8-bit microcontroller designed by Atmel. It features a powerful 8051 core with embedded Flash memory, making it suitable for embedded applications requiring high-speed processing and program memory flexibility.

How Does AT89C51ED2-UM Work?

The AT89C51ED2-UM works as an 8-bit microcontroller with embedded Flash memory for program storage. It executes instructions and controls peripheral devices based on the program stored in its Flash memory. The microcontroller features a rich set of peripherals and interfaces for versatile embedded system designs.

How Many Pins does AT89C51ED2-UM have and What are the Functions of the Pinout Configuration?

The AT89C51ED2-UM is packaged in a 44-pin PLCC (Plastic Leaded Chip Carrier) package. The pinout configuration includes:

VCC: Power supply pin.
GND: Ground pin.
PSEN: Program Store Enable pin.
ALE/PROG: Address Latch Enable/Program pulse input.
EA/VPP: External Access Enable/Voltage Programming pin.
Port 0/Port 1/Port 2/Port 3: General-purpose I/O ports.
RST: Reset input.

What are the Pros and Cons of AT89C51ED2-UM?

Pros:

High Performance: Features a powerful 8051 core for high-speed processing.
Embedded Flash Memory: Allows flexible program storage and updates.
Rich Peripherals: Offers a variety of peripherals for interfacing with external devices.
Versatility: Suitable for a wide range of embedded applications.
Industry Standard: Based on the popular 8051 architecture with a large user base.

Cons:

Legacy Architecture: Some may find the 8051 architecture somewhat dated compared to newer microcontrollers.
Limited Resources: The amount of Flash memory and RAM may be limiting for complex applications.
Programming Complexity: Requires knowledge of assembly or C programming for efficient code development.

Are There Any Equivalents/Alternatives to AT89C51ED2-UM for Recommendation?

The ATmega8515 from Atmel is a similar 8-bit microcontroller with enhanced features.
Alternatives to the AT89C51ED2-UM include the PIC16F877A from Microchip and the MSP430 series from Texas Instruments.

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AT89C51ED2-UM

AT89C51ED2-UM

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