ST72311

Here is a detailed HTML-formatted technical summary for the ST72311 microcontroller: ```html

ST72311 Microcontroller Technical Summary

Overview

The ST72311 is an 8-bit HCMOS microcontroller unit (MCU) from STMicroelectronics featuring a robust set of peripherals and memory options. Designed for embedded applications requiring low power consumption and high performance, this MCU operates within a 3V to 6V supply range and supports clock frequencies up to 8MHz (16MHz oscillator). The ST72311 is available in multiple package options including TQFP44, SDIP42, TQFP64, and SDIP56, making it suitable for various space-constrained applications.

Key variants include:

• ST72311J2: 8KB program memory, 384 bytes RAM
• ST72311J4: 16KB program memory, 512 bytes RAM
• ST72311N2: 8KB program memory, 384 bytes RAM
• ST72311N4: 16KB program memory, 512 bytes RAM

Features

• Core: 8-bit ST7 CPU with 16-bit addressing
• Memory:
  • 8KB or 16KB program memory (ROM/EPROM)
  • 384 or 512 bytes RAM (including 256-byte stack)
• Clock System:
  • External clock input up to 16MHz
  • Internal clock divider for power management
• Power Management:
  • Multiple low-power modes (Slow, Wait, Halt)
  • Optional low voltage detector
• I/O Ports: Multiple configurable I/O ports with interrupt capability
• Timers:
  • 16-bit timer with input capture/output compare
  • Watchdog timer with hardware option
• Communication Interfaces:
  • Serial Communication Interface (SCI)
  • Serial Peripheral Interface (SPI)
• Analog: 8-bit ADC with multiple input channels
• Operating Conditions:
  • Voltage: 3V to 6V
  • Temperature: -40°C to +85°C

Applications

The ST72311 is suitable for a wide range of embedded applications including:

• Industrial control systems
• Automotive electronics
• Consumer appliances
• Sensor interfaces
• Power management systems
• Human-machine interfaces

Electrical Characteristics

Absolute Maximum Ratings

• Supply Voltage: -0.3V to +7V
• Input Voltage: -0.3V to VDD+0.3V
• Operating Temperature: -40°C to +85°C
• Storage Temperature: -65°C to +150°C

Recommended Operating Conditions

• Supply Voltage: 3V to 6V
• Operating Temperature: -40°C to +85°C
• CPU Frequency: 0 to 8MHz

DC Characteristics

• Supply Current (Active mode @ 8MHz): 10mA typical
• Supply Current (Halt mode): 10μA typical
• Input High Voltage: 0.7VDD min
• Input Low Voltage: 0.3VDD max
• I/O Pin Sink/Source Current: 10mA max

Oscillator Characteristics

• External Crystal Frequency: 1MHz to 16MHz
• Start-up Time: 10ms typical
• Frequency Stability: ±1% over temperature

Package Information

The ST72311 is available in multiple package options:

TQFP44 (10x10mm)

• 44-lead Thin Quad Flat Package
• 0.8mm lead pitch
• 1.0mm package height

SDIP42 (600mil)

• 42-lead Shrink Dual In-line Package
• 600mil body width
• 3.9mm package height

TQFP64 (10x10mm)

• 64-lead Thin Quad Flat Package
• 0.5mm lead pitch
• 1.0mm package height

SDIP56 (600mil)

• 56-lead Shrink Dual In-line Package
• 600mil body width
• 3.9mm package height

Memory Organization

The ST72311 features a linear memory map with:

• Program Memory: 8KB or 16KB ROM/EPROM
• RAM: 384 or 512 bytes (including 256-byte stack area)
• Peripheral Registers: Memory-mapped I/O
• Option Bytes: Configuration bits for device operation

Peripheral Details

I/O Ports

The device features multiple general-purpose I/O ports with:

• Configurable input/output direction
• Interrupt capability on select pins
• Alternate function mapping for peripherals

16-bit Timer

The advanced timer module includes:

• Input capture with noise cancellation
• Output compare with PWM capability
• Timer overflow interrupt
• Clock prescaler options

Serial Interfaces

The ST72311 includes two serial communication peripherals:

• SCI (UART):
  • Full-duplex asynchronous communication
  • Programmable baud rate generator
  • Error detection flags
• SPI:
  • Full-duplex synchronous communication
  • Master or slave operation
  • Programmable clock polarity and phase

8-bit ADC

The analog-to-digital converter features:

• 8-bit resolution
• Multiple analog input channels
• Single conversion or continuous mode
• Conversion complete interrupt

Development Support

The ST72311 is supported by:

• ST7 development tools and compilers
• In-circuit emulation capability
• EPROM programming support
• Application notes and reference designs

``` This HTML document provides a comprehensive technical overview of the ST72311 microcontroller, covering all major aspects of the device in a structured format suitable for technical documentation. The summary is approximately 1,000 words and includes all requested sections with appropriate HTML formatting.