80C517

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80C517 Microcontroller Technical Summary

Overview

The 80C517 is a high-end 8-bit microcontroller from the Siemens SAB 8051 family. It builds upon the industry-standard 8051 architecture while introducing significant enhancements to meet modern application demands. The 80C517 is fully compatible with the Siemens SAB 80C515/80C535 microcontrollers, making it an ideal upgrade path for existing designs. Key improvements include advanced arithmetic capabilities, robust fail-safe mechanisms, enhanced analog signal processing, and expanded timer functionalities.

The 80C517 features an 8 KB on-chip program memory (ROM), while the ROM-less variant, the 80C537, is also available for applications requiring external program storage. The microcontroller operates at a 1 µs instruction cycle with a 12 MHz oscillator frequency, ensuring high performance for embedded applications.

Features

• Memory:
  • 8 KB on-chip program memory (80C517)
  • 256 bytes on-chip RAM
  • 256 directly addressable bits
  • External program and data memory expandable up to 64 KB each
• Performance:
  • 1 µs instruction cycle at 12 MHz
  • 64 out of 111 instructions execute in a single cycle
• Analog Features:
  • 8-bit A/D converter with 12 multiplexed inputs
  • Programmable reference voltages
  • External/internal start of conversion
• Timers & Counters:
  • Two 16-bit timers/counters (8051-compatible)
  • Compare/Capture Unit (CCU) with high-speed 16-bit compare timer
• Serial Communication:
  • Two serial interfaces (UART) with multiprocessor communication support
  • Programmable baud rate generators
• Power Management:
  • Idle mode
  • Power-down mode
  • Slow-down mode
• Fail-Safe Mechanisms:
  • Programmable watchdog timer
  • Oscillator watchdog

Applications

The 80C517 is designed for a wide range of embedded applications, including:

• Industrial automation and control systems
• Motor control and power management
• Analog signal processing and data acquisition
• Communication interfaces (RS-232, RS-485)
• Automotive electronics
• Consumer electronics and appliances

Electrical Characteristics

Operating Conditions

• Supply Voltage (V_CC): 4.5V to 5.5V
• Operating Temperature: -40°C to +85°C
• Clock Frequency: Up to 12 MHz

Power Consumption

• Active Mode: ~25 mA (typical at 12 MHz)
• Idle Mode: ~5 mA (typical)
• Power-Down Mode: <100 µA

I/O Characteristics

• Input Logic Levels:
  • VIH (High-Level Input Voltage): 2.0V min
  • VIL (Low-Level Input Voltage): 0.8V max
• Output Logic Levels:
  • VOH (High-Level Output Voltage): 2.4V min @ 3.2 mA
  • VOL (Low-Level Output Voltage): 0.45V max @ 3.2 mA

Package Information

The 80C517 is available in multiple package options, including:

• PLCC (Plastic Leaded Chip Carrier): 68-pin
• PQFP (Plastic Quad Flat Pack): 80-pin

Pinout Highlights

• Port 0 & Port 2: Multiplexed address/data bus for external memory access
• Port 1 & Port 3: General-purpose I/O with alternate functions (timers, serial interfaces)
• Reset (RST): Active-high reset input
• ALE (Address Latch Enable): Output for latching external addresses
• PSEN (Program Store Enable): Output for external program memory access

Conclusion

The 80C517 microcontroller is a powerful and versatile solution for embedded systems requiring high performance, robust analog capabilities, and extensive peripheral integration. Its compatibility with the 8051 architecture ensures ease of migration for legacy designs, while its advanced features make it suitable for modern applications demanding reliability and efficiency.

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