Rainbow Electronics MAXQ3120 - Manual

General Description
The MAXQ3120 microcontroller is a high-performance,
16-bit microcontroller that incorporates dual, true-differen-
tial, 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 elec-
tricity metering market, but can be used in any applica-
tion that requires high-performance operation. The device
can operate at a maximum of 8MHz (DV
DD
= 3.3V). The
MAXQ3120 has 16kWords of flash memory, 256 words of
RAM, three 16-bit timers, and two universal synchro-
nous/asynchronous receiver/transmitters (USARTs). The
microcontroller core and I/O are powered by a single
3.3V supply, and an additional battery supply keeps the
RTC running during power outages.
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 Sinc
3 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
MAXQ3120
High-Precision ADC
Mixed-Signal Microcontroller
______________________________________________ Maxim Integrated Products 1
Rev 1; 8/05
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Selector Guide, Typical Operating Circuit, and
Pin Configuration appear at end of data sheet.
Note: Some revisions of this device may incorporate deviations
from published specifications known as errata. Multiple revi-
sions of any device may be simultaneously available through
various sales channels. For information about device errata, go
to: www.maxim-ic.com/errata.
MAXQ is a trademark of Maxim Integrated Products, Inc.
+Denotes a Pb-free/RoHS-compliant device.
Ordering Information
PART TEMP RANGE PIN-PACKAGE
MAXQ3120-FFN -40°C to +85°C 80 MQFP
MAXQ3120-FFN+ -40°C to +85°C 80 MQFP
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
Applications