DS5000FP - 8051-Compatible Microcontroller with Nonvolatile RAM

Overview

The DS5000FP is an advanced 8051-compatible microcontroller that utilizes nonvolatile RAM (NV RAM) technology instead of traditional ROM. This innovative architecture provides significantly greater flexibility compared to standard 8051 microcontrollers while maintaining full compatibility with the 8051 instruction set, timers, serial port, and parallel I/O ports. The use of NV RAM enables in-system programming and reprogramming, allowing for dynamic modification of application software even during operation.

Key Features

• Fully compatible with standard 8051 architecture
• Nonvolatile RAM technology for flexible program storage
• In-system programming and reprogramming capability
• Self-modifying application software support
• Configurable memory access between 8K and 64K bytes
• Maintains all standard 8051 peripherals:
  • Three 16-bit timer/counters
  • Full-duplex serial port
  • Four 8-bit parallel I/O ports
  • 128 bytes of internal RAM
• Enhanced security features for code protection
• Wide operating voltage range
• Low-power consumption modes

Applications

The DS5000FP is particularly well-suited for applications requiring frequent software updates or adaptive functionality. Its unique capabilities make it ideal for:

• Field-upgradeable systems
• Prototyping and development environments
• Industrial control systems
• Data acquisition systems
• Embedded systems requiring runtime modification
• Secure communication devices
• Automotive electronics
• Medical equipment
• Test and measurement instruments

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (Vcc): -0.5V to +6.0V
• Input Voltage (any pin): -0.5V to Vcc +0.5V
• Operating Temperature Range: -40°C to +85°C
• Storage Temperature Range: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (Vcc): 4.5V to 5.5V
• Operating Temperature: 0°C to 70°C (commercial)
• Clock Frequency: 0 to 16MHz

DC Characteristics

• Input Low Voltage (VIL): -0.5V to 0.8V
• Input High Voltage (VIH): 2.0V to Vcc +0.5V
• Output Low Voltage (VOL): 0.45V max (IOL = 1.6mA)
• Output High Voltage (VOH): 2.4V min (IOH = -60μA)
• Power Supply Current (Active Mode): 25mA typical at 16MHz
• Power Supply Current (Idle Mode): 6mA typical at 16MHz
• Power Supply Current (Power Down Mode): 100μA typical

Functional Description

Processor Core

The DS5000FP maintains complete compatibility with the standard 8051 architecture, including the same instruction set, addressing modes, and register set. The core features an enhanced 8-bit CPU with improved execution efficiency for most instructions.

Memory Architecture

The nonvolatile RAM technology provides several advantages over traditional ROM-based microcontrollers:

• Eliminates the need for separate programming equipment
• Allows field updates of firmware
• Enables self-modifying code applications
• Provides faster development cycles

The memory space is configurable between 8K and 64K bytes, providing flexibility for various application requirements.

Peripheral Features

The DS5000FP includes all the standard 8051 peripherals with some enhancements:

• Timers/Counters: Three 16-bit timer/counters with multiple operating modes
• Serial Port: Full-duplex UART with framing error detection
• Parallel I/O: Four 8-bit bidirectional ports with programmable pull-ups
• Interrupt System: Five interrupt sources with two priority levels

Package Information

Available Packages

• 40-pin Plastic Dual In-line Package (PDIP)
• 44-pin Plastic Leaded Chip Carrier (PLCC)
• 44-pin Thin Quad Flat Pack (TQFP)

Pin Configuration (PDIP)

The 40-pin PDIP package maintains pin compatibility with standard 8051 devices:

• Pins 1-8: Port 1 (P1.0 to P1.7)
• Pin 9: Reset
• Pins 10-17: Port 3 (P3.0 to P3.7)
• Pin 18: XTAL2 (Crystal oscillator output)
• Pin 19: XTAL1 (Crystal oscillator input)
• Pin 20: Vss (Ground)
• Pins 21-28: Port 2 (P2.0 to P2.7)
• Pin 29: PSEN (Program Store Enable)
• Pin 30: ALE/PROG (Address Latch Enable)
• Pin 31: EA/VPP (External Access Enable)
• Pin 32-39: Port 0 (P0.0 to P0.7)
• Pin 40: Vcc (Power Supply)

Development Support

The DS5000FP is supported by a comprehensive development ecosystem:

• Standard 8051 development tools and compilers
• Specialized programming utilities for NV RAM
• In-circuit emulation support
• Evaluation boards and reference designs
• Detailed technical documentation and application notes

Ordering Information

The DS5000FP is available in several variants:

• DS5000FP-8: 8K byte NV RAM version
• DS5000FP-16: 16K byte NV RAM version
• DS5000FP-32: 32K byte NV RAM version
• DS5000FP-64: 64K byte NV RAM version

Each variant is available in all package options with commercial (0°C to +70°C) or industrial (-40°C to +85°C) temperature ranges.