ST72671 Microcontroller Technical Summary

Overview

The ST72671 is a high-performance HCMOS microcontroller unit (MCU) designed for embedded applications requiring robust processing capabilities, versatile peripherals, and USB connectivity. It features an 8-bit CPU core with advanced memory architecture, multiple communication interfaces, and power-saving modes, making it suitable for a wide range of industrial and consumer applications.

Key Highlights

• 8-bit ST7 CPU core with up to 8 MHz operating frequency (24 MHz quartz support)
• Integrated USB 2.0 interface with 2 endpoints
• On-chip 10-bit and 12-bit DAC converters
• 8-channel 8-bit ADC for analog signal processing
• Comprehensive timer and PWM functionality
• Multiple communication interfaces including I²C and SCI

Features

Core Architecture

• 8-bit ST7 CPU with 16-bit addressing
• Up to 8 MHz CPU clock speed (with 24 MHz external crystal)
• Multiple addressing modes for efficient programming

Memory

• Program Memory Options:
  • 16K or 32K bytes
• RAM:
  • 512 bytes (256 bytes stack) or 1K bytes (256 bytes stack) depending on model

Peripherals

• USB Interface:
  • USB 2.0 compliant
  • 2 endpoints
• Analog Conversion:
  • 10-bit DAC: 4 channels
  • 12-bit DAC: 1 channel
  • 8-bit ADC: 8 channels
• Timers:
  • 16-bit timer with multiple operating modes
  • Watchdog timer
• Communication Interfaces:
  • I²C multimaster interface
  • Serial Communications Interface (SCI)
• General Purpose I/O:
  • Up to 34 programmable I/O pins

Power Management

• Operating voltage: 4.0V to 5.5V
• Multiple power-saving modes:
  • Slow mode
  • Wait mode
  • Halt mode

Applications

The ST72671 is suitable for a wide range of applications including:

• USB peripheral devices
• Industrial control systems
• Consumer electronics
• Automotive accessories
• Medical devices
• Data acquisition systems
• Human interface devices

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage: -0.3V to +6.5V
• Input Voltage: -0.3V to VDD+0.3V
• Operating Temperature Range: 0°C to +70°C
• Storage Temperature Range: -55°C to +150°C

Recommended Operating Conditions

• Supply Voltage: 4.0V to 5.5V
• Operating Temperature: 0°C to +70°C
• CPU Frequency: Up to 8 MHz (with 24 MHz quartz)

DC Characteristics

• Input High Voltage: 0.7VDD min
• Input Low Voltage: 0.3VDD max
• Output High Voltage: VDD-0.5V min
• Output Low Voltage: 0.5V max

Analog Characteristics

• ADC Resolution: 8 bits
• ADC Conversion Time: Typically 10μs
• DAC Resolution: 10-bit (4 channels) and 12-bit (1 channel)
• DAC Linearity: ±1 LSB

Package Information

The ST72671 is available in multiple package options:

• QFP64 (Quad Flat Package, 64 pins)
• SDIP56 (Shrink Dual In-line Package, 56 pins)
• TQFP64 (Thin Quad Flat Package, 64 pins)
• PSDIP56 (Plastic Shrink DIP, 56 pins)
• CSDIP56 (Ceramic Shrink DIP, 56 pins)

Package Dimensions

• QFP64: 10mm x 10mm body, 0.5mm pitch
• SDIP56: 18.1mm x 7.62mm body, 1.778mm pitch
• TQFP64: 10mm x 10mm body, 0.5mm pitch

Ordering Information

The ST72671 is available in different variants:

• ST72671N4: 16K program memory, 512 bytes RAM
• ST72671N6: 32K program memory, 1K bytes RAM

Code Transfer

Customer-specific code can be transferred to ST for programming into the devices. Please contact ST sales representatives for specific requirements and minimum order quantities.

Additional Information

For complete technical details, refer to the ST72671 datasheet which includes:

• Detailed memory map
• Register descriptions for all peripherals
• Instruction set details
• Timing diagrams
• Application notes