HMC6343_13 Datasheet, PDF (12/13 Pages) Honeywell Solid State Electronics Center – 3-Axis Compass with Algorithms

HMC6343
Operational Mode Registers
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
User Hard-Iron Calibration
The HMC6343 provides a user calibration routine with the 0x71 command permitting entry into the calibration mode and
the 0x7E command to exit the calibration mode.
After entering the calibration mode, rotate the device reasonably steady for 360 degrees about the Y (Left - Right) axis
and then 360 degrees about Z (Up - Down) axis. During the first rotation, maintain the Y axis at Level as much as
possible. Maintain the Z axis upright as much as possible during the second rotation and until the exit calibration
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