MAXQ2000-RFX+ datasheet(32/39 Pages) MAXIM

32 / 39 page

Low-Power LCD Microcontroller

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• Flexibility to use external resistors to adjust drive volt-

ages and current capacity

A simple LCD-segmented glass interface example

demonstrates the minimal hardware required to inter-

face to a MAXQ2000 microcontroller. A two-character

LCD is controlled, with each character containing

seven segments plus decimal point. The LCD controller

is configured for 1/2 duty cycle operation, meaning the

active segment is controlled using a combination of

segment signals, and COM0 or COM1 signals are used

to select the active display.

Applications

The low-power, high-performance RISC architecture of

the MAXQ2000 makes it an excellent fit for many

portable or battery-powered applications that require

cost-effective computing. The high-throughput core is

complemented by a 16-bit hardware multiplier-accumu-

lator, allowing the implementation of sophisticated com-

putational algorithms. Applications benefit from a wide

range of peripheral interfaces, allowing the microcon-

troller to communicate with many external devices. With

integrated LCD support of up to 100 or 132 segments,

applications can support complex user interfaces.

Displays are driven directly with no additional external

hardware required. Contrast can be adjusted using a

built-in, adjustable resistor. The simplified architecture

reduces component count and board space, critical

factors in the design of portable systems.

The MAXQ2000 is ideally suited for applications such

as medical instrumentation, portable blood glucose

equipment, and data collection devices. For blood glu-

cose measurement, the microcontroller integrates an

SPI interface that directly connects with analog front

ends for measuring test strips.

Additional Documentation

Designers must have four documents to fully use all the

features of this device. This data sheet contains pin

descriptions, feature overviews, and electrical specifi-

cations. Errata sheets contain deviations from pub-

lished specifications. The user’s guides offer detailed

information about device features and operation. The

following documents can be downloaded from

www.maxim-ic.com/microcontrollers.

• The MAXQ2000 errata sheet, available at

www.maxim-ic.com/errata.

• The MAXQ Family User’s Guide, which contains

detailed information on core features and operation,

including programming.

• The MAXQ Family User’s Guide: MAXQ2000

Supplement, which contains detailed information on

features specific to the MAXQ2000.

SEG0

SEG1

SEG2

SEG3

COM0

SEG0:7

CONNECTED TO DARK GREY SEGMENTS

COM1

CONNECTED TO LIGHT GREY SEGMENTS

SEG4

SEG5

SEG6

SEG7

MAXQ2000

Figure 5. Two-Character, 1/2 Duty, LCD Interface Example

MAXQ2000-RFX+ Datasheet(PDF) 32 Page - Maxim Integrated Products

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