80515

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80515 Microcontroller Technical Summary

Overview

The SAB 80515 is a high-performance 8-bit microcontroller belonging to the Siemens SAB 8051 family. It is designed in both MYMOS and ACMOS technologies, with the ACMOS version (SAB 80C515) offering enhanced power efficiency. This microcontroller integrates a rich set of peripherals, making it suitable for embedded control applications requiring high computational power and low power consumption.

The SAB 80515 is functionally compatible with the SAB 8051 architecture while incorporating several enhancements, such as an on-chip A/D converter, expanded I/O capabilities, and advanced power-saving modes. It is available in a 68-pin plastic leaded chip carrier (P-LCC-68) package.

Key Features

• CPU Core: 8-bit architecture with 1 µs instruction cycle at 12 MHz
• Memory:
  • 8 KB on-chip ROM (program memory)
  • 256 bytes on-chip RAM (data memory)
  • External memory expandable up to 64 KB for both program and data
• I/O Ports:
  • Six 8-bit bidirectional digital I/O ports
  • One dedicated input port for digital signals
  • Alternate functions for timer, serial communication, and external interrupts
• Analog Features:
  • 8-channel, 8-bit A/D converter with programmable reference voltages
• Timers & Counters:
  • Three 16-bit timer/counters (Timer 0, Timer 1, Timer 2)
  • Compare/capture/reload functionality for Timer 2
  • 16-bit watchdog timer (WDT)
• Serial Communication:
  • Full-duplex UART with four operating modes
  • Multiprocessor communication support
  • Programmable baud rate generator
• Power Management:
  • Idle mode (CPU halted, peripherals active)
  • Power-down mode (ultra-low power consumption with RAM retention)
• Interrupt System:
  • 12 interrupt sources (7 external, 5 internal)
  • Four programmable priority levels
• Package: 68-pin P-LCC (Plastic Leaded Chip Carrier)

Applications

The SAB 80515 is well-suited for a wide range of embedded control applications, including:

• Industrial automation and process control
• Motor control systems
• Data acquisition systems
• Consumer electronics (appliances, smart devices)
• Automotive electronics (sensors, dashboard controls)
• Medical instrumentation
• Communication interfaces (RS-232, SPI, I²C via bit-banging)

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage (V_CC): -0.5V to +7.0V
• Input Voltage (V_IN): -0.5V to V_CC + 0.5V
• Operating Temperature: 0°C to +70°C (commercial), extended ranges available
• Storage Temperature: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage (V_CC): 4.5V to 5.5V
• Clock Frequency: Up to 12 MHz
• Analog Reference Voltage (V_REF): 0V to V_CC

Power Consumption

• Active Mode (12 MHz): Typically 25 mA
• Idle Mode: Reduced current (peripherals active)
• Power-Down Mode: < 100 µA (RAM retention)

Timing Characteristics

• Instruction Cycle Time: 1 µs (at 12 MHz)
• A/D Conversion Time: ~20 µs (typical)
• Reset Pulse Width: Minimum 24 clock cycles

Package Information

The SAB 80515 is available in a 68-pin Plastic Leaded Chip Carrier (P-LCC-68) package with the following mechanical specifications:

• Package Dimensions: 24.0 mm × 24.0 mm (body)
• Pin Pitch: 1.27 mm (50 mil)
• Lead Count: 68 (17 pins per side)
• Mounting Style: Surface-mount (SMD)

Functional Block Diagram

The microcontroller consists of the following key functional blocks:

• Central Processing Unit (CPU): 8-bit architecture with Boolean processing capabilities
• Memory Interface: On-chip ROM/RAM with external expansion support
• Peripheral Modules: Timers, UART, A/D converter, watchdog timer
• I/O Structure: Configurable ports with alternate functions
• Clock & Reset Circuitry: Crystal oscillator and power-on reset

Conclusion

The SAB 80515 is a versatile microcontroller offering a blend of computational power, integrated peripherals, and energy efficiency. Its compatibility with the 8051 ecosystem, combined with enhancements like the A/D converter and advanced timers, makes it a strong choice for embedded systems requiring analog interfacing and real-time control.

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