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PDF HMC6343 Data sheet ( Hoja de datos )
| Número de pieza | HMC6343 | |
| Descripción | 3-Axis Digital Compass Module | |
| Fabricantes | Honeywell | |
| Logotipo |  |
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Three-axis Compass with Algorithms
HMC6343
The Honeywell HMC6343 is a fully integrated compass module that includes
firmware for heading computation and calibration for magnetic distortions.
The module combines three-axis magneto-resistive sensor, three-axis MEMS
accelerometer, analog and digital support circuits, microprocessor and
algorithms required for heading computation. By combining the sensor
elements, processing electronics, and firmware into a 9.0mm by 9.0mm by
1.9mm LCC package, Honeywell offers a complete, ready to use tilt-
compensated electronic compass. This provides design engineers with the
simplest solution to integrate high volume, cost effective compasses into
binoculars, cameras, night vision optics, laser ranger finders, antenna
positioning, and other industrial compassing applications.
The HMC6343 utilizes Honeywell’s Anisotropic Magnetoresistive (AMR) technology that provides advantages over other
magnetic sensor technologies. The sensors feature precision sensitivity and linearity, solid-state construction with very
low cross-axis sensitivity designed to measure both direction and magnitude of Earth’s magnetic field. Honeywell’s
Magnetic Sensors are among the most sensitive and reliable low-field sensors in the industry.
FEATURES
BENEFITS
Compass with Heading/Tilt Outputs
A complete compass solution including compass firmware
Three-Axis MR Sensors, Accelerometers A digital compass solution with heading and tilt angle outputs in a
and a Microprocessor in a Single
chip-scale package
Package
Compass Algorithms
For computation of heading, and magnetic calibration for hard-iron
9 x 9 x 1.9mm LCC Surface Mount
Package
Small size, easy to assemble and compatible with high speed
surface mount technology assembly
Low Voltage Operations
Compatible with battery powered applications
EEPROM Memory
To store compass data for processor routines
Digital Serial Data Interface
I2C Interface, easy to use 2-wire communication for heading output
Lead Free Package Construction
Flexible Mounting
Complies with RoHS environmental standards
Can be mounted on horizontal or vertical circuit boards
1 page  
HMC6343
BASIC SCHEMATIC INTERFACE
(Optional)
Offset Straps
The three offset straps have a spiral of metallization that couples in the magnetic sensor element’s sensitive axis. With
current applied the straps will generate a magnetic field internal to the sensor. With most applications, the offset strap is
not utilized and can be ignored. Designers can leave one or both strap connections (Off- and Off+) open circuited, or
ground one connection node.
DRDY Pin
The DRDY pin will rise and go high when new data have been loaded into the output registers. The amount of time the
DRDY pin stays low depends on the ODR (Output Data Rate). The table below shows the times for each ODR setting.
ODR
1
5
10
DRDY Low
>750 uS
>150 uS
>75 uS
Operational Modes
The HMC6343 has three operational modes; Sleep, Standby, and Run. Sleep mode is defined as having the analog
circuitry powered off, and has the lowest power consumption while power is applied to the VDD pins. Standby mode has
the HMC6343 fully powered, but with no measurements performed and the processor is waiting for commands to perform.
Run mode is fully engaged in continuous measurements at the configured rate, and ready to receive further commands.
The operational mode settings are stored in EEPROM register 0x04, and shown further the HMC6343 protocol definition.
www.magneticsensors.com
5
5 Page 
HMC6343
0xF1
Write to EEPROM, RAM No Response Data. Data Settling Time
Operational Mode Registers
10
EEPROM registers 0x04 and 0x05 contain bits that are read for operational mode status and for setting the Run Mode
measurement rate. The tables below describe the register contents and interpretation. It is recommended that Operational
Mode Register 1 and 2 written only to change default orientation and update measurement rate.
Table 4 – Operational Mode Register 1 (EEPROM 0x04)
OM1_7 OM1_6 OM1_5 OM1_4 OM1_3 OM1_2 OM1_1 OM1_0
Comp(0) Cal(0) Filter(0) Run(1) Stdby(0) UF(0) UE(0) Level(1)
Table 5 – Operational Mode Register 1 Bit Designations
Location
OM1_7
OM1_6
OM1_5
OM1_4
OM1_3
OM1_2
OM1_1
OM1_0
Name
Comp
Cal
Filter
Run
Stdby
UF
UE
Level
Description
Calculating compass data if set. (read only)
Calculating calibration offsets if set. (read only)
IIR Heading Filter used if set.
Run Mode if set.
Standby Mode if set.
Upright Front Orientation if set.
Upright Edge Orientation if set.
Level Orientation if set
Table 6 – Operational Mode Register 2 (EEPROM 0x05)
OM2_7 OM2_6 OM2_5 OM2_4 OM2_3 OM2_2 OM2_1 OM2_0
(0) (0) (0) (0) (0) (0) MR1(0) MR0(1)
Table 7 – Operational Mode Register 2 Bit Designations
Location
OM2_7 to
OM2_2
OM2_1 to
OM2_0
Name
0
MR1, MR0
Description
These bits must be cleared for correct operation.
Measurement Rate
0,0 = 1Hz
0,1 = 5Hz (default)
1,0 = 10Hz
1,1 = Not Assigned
www.magneticsensors.com
11
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet HMC6343.PDF ] | |
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