HMC6343
command is issued. The first rotation can also be done by rotating 360 degrees about X (Fore -Aft) axis. Then exit
calibration.
The calibration routine collects these readings to correct for hard-iron distortions of the magnetic field. These hard-iron
effects are due to magnetized materials nearby the HMC6343 part that in a fixed position with respect to the end user
platform. An example would be the magnetized chassis or engine block of a vehicle in which the compass is mounted
onto. Upon exiting the calibration mode, the resulting magnetometer offsets are updated.
Example Communication
For basic power up and compassing using the defaults, the flowing order of operations is recommended:
1. Apply power to the VDD pins (nominally +3.3 volts)
2. Wait at least 500 milli-seconds for device initialization. The HMC6343 is in the default Run Mode.
3. Send 0x32 and 0x50 to command the Heading and Tilt Data to be clocked out next.
4. Wait at least 1 milli-second to allow the HMC6343 to process the command.
5. Send 0x33 and clock back six more response Bytes from the HMC6343. These will be the Heading, Pitch and
Roll Byte pairs; binary format in tenths of a degree with 2’s compliment on pitch and roll angles. (0 to 3600
heading, ±900 pitch, and ±900 roll)
6. Repeat steps 3 - 5 every 200 milli-seconds or longer to get fresh data from the default 5Hz update rate.
ORDERING INFORMATION
Ordering Number
HMC6343
HMC6343-demo
HMC6343-eval
Product
3 axis Compass with Algorithms
Development Kit
Evaluation Board
Packaging
Tubes
Demo Board, USB Cable
and Demo Software
Board
FIND OUT MORE
For more information on Honeywell’s Magnetic Sensors visit us online at www.magneticsensors.com or contact us at
800-323-8295 (763-954-2474 internationally).
The application circuits herein constitute typical usage and interface of Honeywell product. Honeywell does not warranty or assume liability of customer-
designed circuits derived from this description or depiction.
Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
U.S. Patents 4,441,072, 4,533,872, 4,569,742, 4,681,812, 4,847,584 and 6,529,114 apply to the technology described
Caution
This part is sensitive to damage
by electrostatic discharge. Use ESD
precautionary procedures when
touching, removing or inserting.
CAUTION: ESDS CAT. 1A
Honeywell
12001 Highway 55
Plymouth, MN 55441
Form #900357
www.honeywell.com
Tel: 800-323-8295
www.magneticsensors.com
March 2011
?2011 Honeywell International Inc.
13
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