Description

T89C51RD2 is a high-performance CMOS Flash version of the 80C51 CMOS single chip 8-bit microcontroller. It contains a 64 Kbytes Flash memory block for program and data. The Flash memory can be programmed either in parallel mode or in serial mode with ISP capability or software. The programming voltage is internally generated from the standard VCC pin. The T89C51RD2 retains all features of the ATMEL 80C52 with 256 bytes of internal RAM, a 7-source 4-level interrupt controller, and three timer/counters.

Specifications and features

• 80C52 Compatible
• Four 8-bit I/O Ports (or 6 in 64/68 Pins Packages)
• Three 16-bit Timer/Counters
• 256 bytes Scratch Pad RAM
• 7 Interrupt Sources With 4 Priority Levels
• ISP (In-System Programming) Using Standard VCC Power Supply
• Boot Flash Contains Low Level Flash Programming Routines and a Default Serial Loader
• High-Speed Architecture
• 64K bytes On-chip Flash Program/Data Memory
• On-chip 1024 Bytes Expanded RAM (XRAM)
• Dual Data Pointer Variable Length MOVX for Slow RAM/Peripherals
• Improved X2 Mode with Independent Selection for CPU and Each Peripheral
• 2K bytes EEPROM Block for Data Storage
• Programmable Counter Array with High Speed Output, Compare/Capture, and Pulse Width Modulator
• Watchdog Timer Capabilities
• Asynchronous Port Reset
• Full-duplex Enhanced UART
• Low EMI (Inhibit ALE)
• Hardware Watchdog Timer (One-time Enabled with Reset-out)
• Power Control Modes: Idle Mode, Power-down Mode
• Power Supply: Commercial and Industrial versions available
• Temperature Ranges: Commercial (0 to +70°C) and Industrial (-40 to +85°C)
• Packages: PDIL40, PLCC44, VQFP44, PLCC68, VQFP64

Application Scenarios

This electronic component model can be used in various applications such as:

• Microcontroller-based systems
• Embedded systems
• Industrial automation
• Consumer electronics
• Communication devices

Comparison

• High-performance CMOS Flash microcontroller
• Large memory capacity
• Parallel or serial programming options
• Integrated features and peripherals
• Multiple power control modes
• Wide temperature range

• No built-in analog-to-digital converter
• Limited number of I/O ports in certain package configurations
• Requires external power supply