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HMR3100 PDF даташит

Спецификация HMR3100 изготовлена ​​​​«Honeywell» и имеет функцию, называемую «DIGITAL COMPASS SOLUTION».

Детали детали

Номер произв HMR3100
Описание DIGITAL COMPASS SOLUTION
Производители Honeywell
логотип Honeywell логотип 

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HMR3100 Даташит, Описание, Даташиты
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HMR3100
SENSOR PRODUCTS
DIGITAL COMPASS SOLUTION
Features
5° Heading Accuracy, 0.5° Resolution
2-axis Capability
Small Size (19mm x 19mm x 4.5mm), Light Weight
Advanced Hard Iron Calibration Routine for Stray
Fields and Ferrous Objects
0° to 70°C Operating Temperature Range
2.6 to 5 volt DC Single Supply Operation
General Description
The Honeywell HMR3100 is a low cost, two-axis
electronic compassing solution used to derive heading
output. Honeywell’s magnetoresistive sensors are
utilized to provide the reliability and accuracy of these
small, solid state compass designs. The HMR3100
communicates through binary data and ASCII
characters at four selectable baud rates of 2400, 4800,
9600, or 19200. This compass solution is easily
integrated into systems using a simple USART
interface.
Top Side
APPLICATIONS
Vehicle Compassing
Hand-Held Electronics
Telescope Positioning
Navigation Systems
Bottom Side
Block Diagram
HMC1022
VCC
CPU
RXD
TXD
RTS
GND
Solid State Electronics Center www.magneticsensors.com (800) 323-8295 Page 1









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HMR3100 Даташит, Описание, Даташиты
HMR3100
SPECIFICATIONS
Characteristics
Conditions
Heading
Accuracy
Resolution
Repeatability
Magnetic Field
Range
Resolution
Electrical
Input Voltage
Current
Digital Interface
USART
Update Rate
Connector
Physical
Dimensions
Level
Maximum Magnetic Flux Density
Unregulated
Normal Mode (Average 1Hz Sampling)
Sleep Mode
Calibration
USART 9600.N.8.1
Continuous or Polled
8-Pin Wide DIP
Circuit Board Assembly
Weight
Environment
Temperature
Operating
Storage
SENSOR PRODUCTS
Min Typ Max Units
± 5 deg RMS
0.5 deg
± 3 deg
± 2 gauss
6 milli-gauss
2.6 3
5 volts DC
0.1 0.2 0.5
mA
1 µA
6.1 7.3 17.3 mA
2400
-
9600
2
19200
20
Baud
Hz
-
19 x 19 x
4.5
1.5
mm
grams
0 - +70 °C
-40 - +110 °C
Circuit Description
The HMR3100 Digital Compass Solution circuit board includes the basic magnetic sensors and electronics to provide
a digital indication of heading. The HMR3100 has a Honeywell HMC1022 two-axis magnetic sensor on board. The
HMR3100 allows users to derive compassing (heading) measurements when the board is in a reasonably horizontal
(flat) position.
The HMR3100 circuit starts with the HMC1022 two-axis magnetic sensors providing X and Y axis magnetic sensing
of the earth’s field. These sensors are supplied power by a switching transistor to conserve power with battery
operated products. The sensor output voltages are provided to a dual operational amplifier and then to analog to
digital converters (ADC) onboard a microcontroller (µC) integrated circuit. The microcontroller integrated circuit
periodically samples the amplified sensor voltages, performs the offset corrections, and computes the heading. This
microcontroller also performs the external serial data interface and other housekeeping functions such as the
calibration routine.
The power supply for the HMR3100 circuit board is to be about a +3 to +5 volt range allowing the user to provide a
single lithium battery to logic level supply voltages. The power supply architecture is a single ground system for
single ended supply sources (+ and ground return).
Solid State Electronics Center www.magneticsensors.com (800) 323-8295 Page 2









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HMR3100 Даташит, Описание, Даташиты
HMR3100
SENSOR PRODUCTS
Note the “North Arrow” printed on the HMR3100 circuit board top side. This is the mechanical reference for product
alignment purposes. When placed on the development kit’s RS-232 motherboard assembly, this arrow also points
toward the 9-volt batterypin block on the motherboard (away from the RJ-11 jack).
Pin Configuration
Pin Number
1
2
3
4
5
6
7
8
Pin Name
VCC
NC
RTS
NC
TXD
RXD
GND
NC
Description
Power Supply Input
No Connection
Ready To Send Input
No Connection
Transmit Data Output
Receive Data Input
Power and Signal Ground
No Connection
The HMR3100 board is 0.77” on each side with eight pins in groups of four spaced at 0.6” apart in wide-DIP format.
Seated height is approximately 0.275”. See Figure 1 for further mechanical details.
USART Communication Protocol
HMR3100 module communicates through binary data and ASCII characters at four selectable baud rates of 2400,
4800, 9600, or 19200. The default data bit format is USART 9600.N.8.1. The baud rate selection is determined by
the position of jumpers J1 and J3. These jumpers are zero ohm SMT resistors (jumpers) and are normally high (logic
1) when removed, and grounded (logic 0) when in place. At 2400 baud, no jumpers are present for a 1,1 logic
presentation. At 4800 baud J3 is present for a 1,0 logic presentation. The factory default setting of 9600 baud is
created by a jumper present on J1 for a 0,1 logic presentation. With J1 and J3 jumpers present for a 0,0 logic
presentation, the compass module works at 19200 baud. See Figure 1 for jumper locations. Jumper J2 is for factory
testing, and J4 is for Y-axis inversion should the end-item mount of the HMR3100 module be upside down (pins up).
0.77”
Pin 1
Pin 4
xtal
µC
Pin 8
Pin 5
J1 J2 J3 J4
Top Side
Figure 1
HMR3100 Pinout
0.77”
Solid State Electronics Center www.magneticsensors.com (800) 323-8295 Page 3










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