General Description

The MAXQ3100 microcontroller is a low-power, 16-bit RISC device that incorporates an integrated liquid-crystal display (LCD) interface that can drive up to 160 segments, two analog comparators with precision internal 1.25V reference voltage, and a real-time clock (RTC) module with a dedicated battery-backup supply.

Features

♦ High-Performance, Low-Power, 16-Bit RISC Core

    4.194MHz Operation, Approaching 1MIPS per MHz

    3.3V Core and I/O

    33 Instructions, Most Single-Cycle

    Three Independent Data Pointers Accelerate Data Movement with Automatic Increment/Decrement

    16-Level Hardware Stack

    16-Bit Instruction Word, 16-Bit Data Bus

    16 x 16-Bit, General-Purpose Working Registers

    Optimized for C-Compiler (High-Speed/Density Code)

♦ Program and Data Memory

    8kWords EEPROM

    200,000 EEPROM Write/Erase Cycles

    512 Words of Internal Data RAM

    JTAG-Compatible Debug Port Bootloader for Programming

♦ Peripheral Features

    Up to 27 General-Purpose I/O Pins, Most 5V Tolerant

    160-Segment LCD Driver

        Up to 4 COM and 40 Segments

        Static, 1/2, and 1/3 LCD Bias Supported

        No External Resistors Required

    Two Analog Comparators with Internal +1.25V Precision Reference

    Two Serial USARTs, One with Infrared PWM Support

    Digital Temperature Sensor

    Three 16-Bit Programmable Timers/Counters

    8-Bit, Subsecond, System Timer/Alarm

    Battery-Backed, 32-Bit RTC with Time-of-Day Alarm and Digital Trim

    Programmable Watchdog Timer

♦ Flexible Programming Interface

    Bootloader Simplifies Programming

    In-System Programming Through Debug Port

    Supports In-Application Programming of EEPROM

♦ Power Consumption

    1.9mA at 4.194MHz, 3.6V Operation

    1.9µA Standby Current in Sleep Mode

    Low-Power Divide-by-256 Mode

Applications

    Utility Meters

    Battery-Powered and Portable Devices

    Electrochemical and Optical Sensors

    Industrial Control

    Data-Acquisition

    Systems and Data Loggers

    Home Appliances

    Consumer Electronics

    Thermostats/Humidity Sensors

    Security Sensors

    Gas and Chemical Sensors

    HVAC

    Smart Transmitters