General Description
The MAXQ3120 microcontroller is a high-performance, 16-bit microcontroller that incorporates dual, true-differential, 16-bit sigma-delta analog-to-digital converters (ADCs), a liquid-crystal display (LCD) interface that can drive up to 112 segments, and a real-time clock (RTC) module with a dedicated battery-backup supply. The MAXQ3120 is uniquely suited for the single-phase electricity metering market, but can be used in any application that requires high-performance operation.

Features
♦ High-Performance, Low-Power, 16-Bit RISC Core
    DC to 8MHz 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
    16kWords Flash Memory
    1,000,000 Flash Write/Erase Cycles
    256 Words of Internal Data RAM
    JTAG Bootloader for Programming
♦ Dual, 16-Bit Sigma-Delta ADCs
    Differential Analog Input Channels
    Programmable Gain of 1x or 16x
    Integrated Sinc3 Filters
    Digital Phase Compensation and Trimmable Bandgap Reference
♦ Peripheral Features
    Up to 32 General-Purpose I/O Pins
    112-Segment LCD Driver
        Up to 4 COM and 28 Segments
        Static, 1/2, and 1/3 LCD Bias Supported
        No External Resistors Required
    Two Serial USARTs, One with Infrared PWM Support
    One-Cycle, 16 x 16 Hardware Multiply/Accumulate with 40-Bit Accumulator
    Three 16-Bit Programmable Timers/Counters, One with Infrared PWM Support
    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 JTAG
    Supports In-Application Programming of Flash
    Memory
♦ Power Consumption
    < 28mA at 8MHz, 3.3V Flash Operation
    320µA Standby Current in Sleep Mode
    Low-Power Divide-by-256 Mode

Applications
    Single-Phase Electricity Metering
    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