AT89C51RD2-RLRIM

AT89C51RD2-RLRIM Datasheet


• On-chip 2048 Bytes EEPROM Block for Data Storage AT89C51ED2 Only 100K Write Cycles

Part Datasheet
AT89C51RD2-RLRIM AT89C51RD2-RLRIM AT89C51RD2-RLRIM (pdf)
Related Parts Information
AT89C51ED2-RLRIM AT89C51ED2-RLRIM AT89C51ED2-RLRIM
AT89C51RD2-SLRIM AT89C51RD2-SLRIM AT89C51RD2-SLRIM
AT89C51ED2-SMRIM AT89C51ED2-SMRIM AT89C51ED2-SMRIM
AT89C51ED2-SLRIM AT89C51ED2-SLRIM AT89C51ED2-SLRIM
AT89C51ED2-RDRIM AT89C51ED2-RDRIM AT89C51ED2-RDRIM
AT89C51ED2-3CSUM AT89C51ED2-3CSUM AT89C51ED2-3CSUM
AT89C51RD2-SLSIM AT89C51RD2-SLSIM AT89C51RD2-SLSIM
AT89C51ED2-RDTIM AT89C51ED2-RDTIM AT89C51ED2-RDTIM
AT89C51ED2-SLSIM AT89C51ED2-SLSIM AT89C51ED2-SLSIM
AT89C51ED2-RLTIM AT89C51ED2-RLTIM AT89C51ED2-RLTIM
AT89C51ED2-3CSIM AT89C51ED2-3CSIM AT89C51ED2-3CSIM
AT89C51RD2-RLTIM AT89C51RD2-RLTIM AT89C51RD2-RLTIM
PDF Datasheet Preview
• 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 CPU and 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, PDIL40
8-bit Flash Microcontroller

AT89C51RD2 AT89C51ED2

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 8bit 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 Powerdown 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.

Table Memory Size and I/O Pins

Package

Flash Bytes

XRAM Bytes Total RAM Bytes

PLCC44/VQFP44/DIL40
1792
2048

PLCC68/VQFP64
1792
2048
2 AT89C51RD2/ED2

Block Diagram

Figure Block Diagram

AT89C51RD2/ED2

RxD TxD VCC VSS ECI PCA T2EX T2 Keyboard

XTALA1 XTALA2

ALE/PROG PSEN EA RD 2 WR 2

EUART

RAM 256x8

Flash 64K x 8

C51 CORE

IB-bus
Ordering Information

Table Possible Order Entries

Data EEPROM Supply Voltage

Temperature Range

Package

AT89C51RD2-SLSIM

PLCC44

AT89C51RD2-RLTIM No

AT89C51RD2-RDTIM 1

AT89C51RD2-SMSIM 1

VQFP44 VQFP64 PLCC68

AT89C51ED2-SLSIM
2.7V - 5.5V

Industrial

PLCC44

AT89C51ED2-RLTIM

VQFP44

AT89C51ED2-3CSIM

PDIL40

AT89C51ED2- SMSIM

PLCC68

AT89C51ED2-RDTIM

VQFP64

AT89C51RD2-SLSUM

PLCC44

AT89C51RD2-RLTUM No

AT89C51RD2-RDTUM 1

AT89C51RD2-SMSUM 1

AT89C51ED2-SLSUM

AT89C51ED2-RLTUM
2.7V - 5.5V

Industrial & Green

VQFP44 VQFP64 PLCC68 PLCC44 VQFP44

AT89C51ED2-3CSUM

PDUL40

AT89C51ED2- SMSUM

PLCC68

AT89C51ED2-RDTUM

VQFP64

Note For PLCC68 and VQFP64 packages, please contact Atmel sales office for availability.

Packing Stick Tray Stick Tray Stick Tray Stick Tray Stick Tray Stick Tray
Ordering Information 127

Packaging Information 128

PLCC44 128 VQFP44 129 PLCC68 130 VQFP64 131 132

Datasheet Change Log for AT89C51RD2/ED2 133

Changes from 4235A -04/03 to 4135B - 06/03 133 Changes from 4235B -06/03 to 4235C - 133 Changes from 4235C - 08/03 to 4235D - 133 Changes from 4235D - 12/03 to 4235E - 133 Changes from 4235E - 04/04 to 4235F - 09/04 133 Changes from 4235F - 09/04 to 4235G - 133 Changes from 4235G - 08/05 to 4235H - 10/06 133

Table of Contents i
iii AT89C51RD2/ED2

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Datasheet ID: AT89C51RD2-RLRIM 519086