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See Technical Specifications

AT89C51RD2-RLTUM +BOM

Suitable for a wide voltage range of 3-5.5V

Manufacturer:

Microchip Technology
Mfr.Part #:

AT89C51RD2-RLTUM
Datasheet:

AT89C51RD2-RLTUM Datasheet (PDF)
Series:

89C
Programmabe:

Verified
Core Processor:

80C51
Core Size:

8-Bit

AT89C51RD2-RLTUM General Description

Atmel's AT89C51RD2-RLTUM microcontroller is a high-performance 8-bit solution designed to meet the demands of various applications. Its 40MHz operating frequency, integrated peripherals, and compatibility with Flash and ISP programming make it a versatile choice for designers. With 128KB Flash memory, 4KB RAM, 32 I/O lines, timers/counters, UART, watchdog timer, ADC, PWM output, and SPI communication, this microcontroller offers a comprehensive set of features for addressing diverse requirements. Additionally, its compact TQFP package and RoHS compliance ensure ease of integration and environmental responsibility. Whether used in automotive systems, industrial control, or other embedded applications, the AT89C51RD2-RLTUM provides the performance, flexibility, and environmental credentials that modern designs demand

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

Series	89C	Programmabe	Verified
Core Processor	80C51	Core Size	8-Bit
Speed	60MHz	Connectivity	SPI, UART/USART
Peripherals	POR, PWM, WDT	Number of I/O	34
Program Memory Size	64KB (64K x 8)	Program Memory Type	FLASH
RAM Size	2K x 8	Voltage - Supply (Vcc/Vdd)	2.7V ~ 5.5V
Oscillator Type	External	Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount	Base Product Number	AT89C51