80C515

80C515 Microcontroller Technical Summary

Overview

The SAB 80C515/80C535 is a high-performance 8-bit microcontroller from the Siemens SAB 8051 family, designed in ACMOS technology. It is functionally compatible with the MYMOS-based SAB 80515/80535 devices while offering enhanced power efficiency and performance. The 80C515 variant includes 8 KB of on-chip program memory, while the 80C535 omits this feature. Both versions are housed in a 68-pin P-LCC package and support extended temperature ranges.

Key enhancements over the standard SAB 8051 architecture include improved power-saving modes (idle and power-down), a 16-bit watchdog timer, and an 8-channel A/D converter. The microcontroller is ideal for applications requiring low power consumption, high integration, and real-time control.

Features

• Core Architecture: 8-bit CPU based on SAB 8051, with 1 µs instruction cycle at 12 MHz.
• Memory:
  • 8 KB on-chip ROM (80C515 only).
  • 256 bytes of on-chip RAM.
  • External memory expandable up to 64 KB for program and data.
• I/O Ports:
  • Six 8-bit bidirectional I/O ports.
  • One dedicated digital input port.
  • Ports 0 and 2 support multiplexed address/data bus for external memory.
• Analog-to-Digital Converter (ADC):
  • 8 multiplexed analog input channels.
  • Programmable reference voltages.
  • Differential input impedance of 1 kΩ.
• Timers/Counters:
  • Three 16-bit timer/counters (Timer 0, Timer 1, Timer 2).
  • Timer 2 supports compare/capture/reload functions.
• Serial Communication:
  • Full-duplex UART with four operating modes.
  • Programmable baud rates.
  • Multiprocessor communication support.
• Power Management:
  • Idle and power-down modes for reduced consumption.
  • 40 bytes of RAM retained during power-down.
• Interrupt System:
  • 12 interrupt sources (7 external, 5 internal).
  • Four priority levels.
• Watchdog Timer: 16-bit watchdog with reset capability.
• Package: 68-pin Plastic Leaded Chip Carrier (P-LCC-68).

Applications

The 80C515 is suited for a wide range of embedded control applications, including:

• Industrial automation and process control.
• Consumer electronics (appliances, smart devices).
• Automotive systems (sensors, dashboard controls).
• Medical instrumentation.
• Power management and battery-operated devices.
• Communication interfaces (RS-232, SPI, I²C via bit-banging).

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.5 V to +7 V.
• Input Voltage (V_IN): -0.5 V to V_CC + 0.5 V.
• Operating Temperature: 0°C to +70°C (standard), extended ranges available.
• Storage Temperature: -65°C to +150°C.

DC Characteristics

• Supply Current (Active Mode @ 12 MHz): Typically 25 mA.
• Supply Current (Idle Mode @ 12 MHz): Typically 5 mA.
• Supply Current (Power-Down Mode): < 100 µA.
• Port I/O Sink/Source Current: 1.6 mA (max per pin).
• ADC Reference Voltage Range: 0 V to V_CC.

AC Characteristics

• Clock Frequency: Up to 12 MHz.
• Machine Cycle: 1 µs (12 MHz operation).
• ADC Conversion Time: 40 µs (max).
• Reset Pulse Width: 24 clock cycles (min).

Package Information

The 80C515 is available in a 68-pin Plastic Leaded Chip Carrier (P-LCC-68) package. Key dimensions and pinout details are as follows:

• Package Dimensions: 24.0 mm × 24.0 mm × 4.0 mm (typical).
• Pin Configuration:
  • Ports 0–5: Multiplexed I/O and peripheral functions.
  • V_CC/GND: Power supply pins.
  • XTAL1/XTAL2: External crystal oscillator connections.
  • RST: Active-high reset input.
  • ALE/PROG: Address latch enable/output.
  • PSEN: Program store enable for external memory.
  • EA/V_PP: External access enable/programming voltage.
• Thermal Resistance: 50°C/W (junction-to-ambient).

Additional Notes

The 80C515 includes corrections and updates from earlier revisions, such as fixes to the WDT reset logic, A/D converter timing, and instruction encoding (e.g., ADD A, direct and CPL bit). For detailed timing diagrams, register maps, and programming guidelines, refer to the official datasheet.