80C310

80C310 Microcontroller Technical Summary

Overview

The DS80C310 is a high-performance, 80C31/80C32-compatible microcontroller designed for applications requiring enhanced speed and efficiency. It features a redesigned processor core that eliminates wasted clock and memory cycles, resulting in significantly improved performance over traditional 8051 architectures. With its 4-clock-per-machine-cycle design (compared to the standard 8051's 12-clock cycle), the DS80C310 achieves execution speeds up to three times faster at the same clock frequency. This microcontroller maintains full compatibility with the 8051 instruction set while offering advanced features such as dual data pointers and variable-length MOVX instructions for optimized memory access.

Key Features

• 80C32 Compatibility
  • Full 8051 pin and instruction set compatibility
  • Integrated full-duplex serial port for communication
  • Three 16-bit timer/counters for precise timing operations
  • 256 bytes of scratchpad RAM for fast data access
  • Multiplexed address/data bus architecture
  • 64KB ROM and 64KB RAM address space
• High-Speed Architecture
  • 4-clock-per-machine-cycle design (vs. 12-clock in standard 8051)
  • Operates from DC to 33MHz clock rates
  • Single-cycle instruction execution in just 121ns
  • Dual data pointer for improved memory access efficiency
  • Optional variable-length MOVX for accessing fast/slow peripherals
• Enhanced Performance
  • Eliminates wasted clock and memory cycles
  • Up to 3x performance improvement over standard 8051 at same clock speed
  • Improved interrupt response time

Applications

The DS80C310 is suitable for a wide range of embedded applications requiring high performance and 8051 compatibility, including:

• Industrial control systems
• Automotive electronics
• Communication equipment
• Medical devices
• Test and measurement instruments
• Consumer electronics
• Embedded networking devices
• Data acquisition systems

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (VCC): -0.5V to +6.0V
• Input Voltage (VIN): -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: Commercial (0°C to +70°C) or Industrial (-40°C to +85°C)
• Clock Frequency: DC to 33MHz

DC Characteristics

• Input Low Voltage (VIL): -0.5V to 0.2VCC
• Input High Voltage (VIH): 0.7VCC 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 (ICC): 15mA typical at 25MHz

AC Characteristics

• Machine Cycle Time: 121ns minimum at 33MHz
• Address Valid to ALE Low: 10ns
• ALE Pulse Width: 20ns
• PSEN Pulse Width: 20ns
• RD/WR Pulse Width: 30ns

Package Information

Available Packages

• 40-pin PDIP (Plastic Dual In-line Package)
  • Dimensions: 52.32mm x 13.97mm
  • Lead pitch: 2.54mm
  • Operating temperature: -40°C to +85°C
• 44-pin PLCC (Plastic Leaded Chip Carrier)
  • Dimensions: 16.66mm x 16.66mm
  • Lead pitch: 1.27mm
  • JEDEC standard: MO-047
• 44-pin TQFP (Thin Quad Flat Package)
  • Dimensions: 10mm x 10mm
  • Lead pitch: 0.8mm
  • Package thickness: 1.0mm

Pin Configuration

The DS80C310 maintains the standard 8051 pinout with enhancements for high-speed operation:

• Port 0: Multiplexed address/data bus
• Port 1: General-purpose I/O with alternate functions
• Port 2: High-order address bus
• Port 3: Special functions (serial I/O, interrupts, etc.)
• Reset: Active-high reset input
• ALE: Address latch enable
• PSEN: Program store enable
• EA/VPP: External access enable/programming voltage
• XTAL1/XTAL2: Crystal oscillator connections

Development Support

The DS80C310 is supported by a comprehensive ecosystem of development tools:

• Assemblers and C compilers from multiple vendors
• In-circuit emulators supporting high-speed operation
• Flash programming utilities
• Evaluation boards for rapid prototyping
• RTOS solutions optimized for high-performance 8051 variants

Conclusion

The DS80C310 represents a significant evolution of the classic 8051 architecture, delivering substantially improved performance while maintaining full compatibility with existing 8051 software and hardware ecosystems. Its enhanced features, including the dual data pointer and variable-length MOVX instructions, make it particularly suitable for applications requiring efficient memory access and high-speed operation. With its wide operating temperature range and multiple package options, the DS80C310 offers designers a flexible solution for demanding embedded applications across industrial, automotive, and consumer markets.