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