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MAXQ2000RAX-MAXQ2000-RAX
Low-Power LCD Microcontroller
General DescriptionThe MAXQ2000 microcontroller is a low-power, 16-bit
device that incorporates a liquid-crystal display (LCD)
interface that can drive up to 100 (-RBX) or 132 (-RAX)
segments. The MAXQ2000 is uniquely suited for the
blood-glucose monitoring market, but can be used in
any application that requires high performance and low-
power operation. The device can operate at a maximum
of either 14MHz (VDD> 1.8V) or 20MHz (VDD> 2.25V).
The MAXQ2000 has 32kWords of flash memory, 1kWord
of RAM, three 16-bit timers, and one or two universal
synchronous/asynchronous receiver/transmitters
(UARTs). Flash memory aids prototyping and low-vol-
ume production. The microcontroller core is powered by
a 1.8V supply, with a separate I/O supply for optimum
flexibility. An ultra-low-power sleep mode makes these
parts ideal for battery-powered, portable equipment.
ApplicationsMedical Instrumentation
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
FeaturesHigh-Performance, Low-Power, 16-Bit RISC CoreDC to 20MHz Operation, Approaching 1MIPS per MHz
Dual 1.8V Core/3V I/O Enables Low Power/Flexible
Interfacing
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-Complier (High-Speed/Density Code)
Program and Data Memory32kWords Flash Memory, Mask ROM for High-
Volume Applications
10,000 Flash Write/Erase Cycles
1kWord of Internal Data RAM
JTAG/Serial Boot Loader for Programming
Peripheral FeaturesUp to 50 General-Purpose I/O Pins
100/132 Segment LCD Driver
Up to 4 COM and 36 Segments
Static, 1/2, and 1/3 LCD Bias Supported
No External Resistors Required
SPITMand 1-Wire®(-RAX Only) Hardware I/O Ports
One or Two Serial UARTs
One-Cycle, 16 x 16 Hardware Multiply/Accumulate
with 48-Bit Accumulator
Three 16-Bit Programmable Timers/Counters
8-Bit, Subsecond, System Timer/Alarm
32-Bit, Binary Real-Time Clock with Time-of-Day Alarm
Programmable Watchdog Timer
Flexible Programming InterfaceBootloader Simplifies Programming
In-System Programming Through JTAG
Supports In-Application Programming of Flash Memory
Ultra-Low Power Consumption190µA typ at 8MHz Flash Operation, PMM1 at 2.2V
700nA typ in Lowest Power Stop Mode
Low-Power 32kHz Mode and Divide-by-256 Mode
MAXQ2000
Low-Power LCD MicrocontrollerRev 2; 12/04
Ordering Information
Typical Operating Circuit and Pin Configurations appear at
end of data sheet.
Note:Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple revisions of
any device may be simultaneously available through various sales channels. For information about device errata, go to:
/errata.
MAXQ is a trademark of Maxim Integrated Products, Inc.
SPI is a trademark of Motorola, Inc.
1-Wire is a registered trademark of Dallas Semiconductor Corp.
MAXQ2000
Low-Power LCD Microcontroller
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICSStresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
Voltage Range on Any Pin Relative to
Ground Except VDD.................................-0.5V to (VDDIO+ 0.5)V
Voltage Range on VDDRelative to Ground.........-0.5V to +2.75V
Voltage Range on VDDIORelative to Ground........-0.5V to +3.6V
Operating Temperature Range...........................-40°C to +85°C
Storage Temperature Range.............................-65°C to +150°C
Soldering Temperature ....................See IPC/JEDEC J-STD-020
.................................................................................Specification
MAXQ2000
Low-Power LCD Microcontroller
ELECTRICAL CHARACTERISTICS (continued)(VDD= VDD(MIN)to VDD(MAX), VDDIO= 2.7V to 3.6V, TA= -40°C to +85°C.) (Note 1)
MAXQ2000
Low-Power LCD Microcontroller
ELECTRICAL CHARACTERISTICS (continued)(VDD= VDD(MIN)to VDD(MAX), VDDIO= 2.7V to 3.6V, TA= -40°C to +85°C.) (Note 1)
MAXQ2000
Low-Power LCD Microcontroller
Note 2:Measured on the VDDpin with VDD= 2.75V and not in reset.
ELECTRICAL CHARACTERISTICS (continued)(VDD= VDD(MIN)to VDD(MAX), VDDIO= 2.7V to 3.6V, TA= -40°C to +85°C.) (Note 1)
