HMC5983-DEM Datasheet, PDF (14/28 Pages) Honeywell Accelerometers – 3-Axis Digital Compass IC

HMC5983
Configuration Register A
The configuration register is used to configure the device for setting the data output rate and measurement configuration.
CRA0 through CRA7 indicate bit locations, with CRA denoting the bits that are in the configuration register. CRA7 denotes
the first bit of the data stream. The number in parenthesis indicates the default value of that bit.CRA default is 0x10.
Table 3: Configuration Register A
CRA7
(0)
CRA6
MA1(0)
CRA5
MA0(0)
CRA4
DO2 (1)
CRA3
DO1 (0)
CRA2
DO0 (0)
CRA1
MS1 (0)
CRA0
MS0 (0)
Table 4: Configuration Register A Bit Designations
Location
CRA7
Name
TS
CRA6 to CRA5 MA1 to MA0
CRA4 to CRA2 DO2 to DO0
CRA1 to CRA0 MS1 to MS0
Description
Set this bit to enable temperature sensor. Temperature
sensor will be measured at each magnetic measurement.
Enable Temperature sensor for automatic compensation of
Sensitivity over temperature.
Select number of samples averaged (1 to 8) per
measurement output.
00 = 1(Default); 01 = 2; 10 = 4; 11 = 8
Data Output Rate Bits. These bits set the rate at which data
is written to all three data output registers.
Measurement Configuration Bits. These bits define the
measurement flow of the device, specifically whether or not
to incorporate an applied bias into the measurement.
The Table below shows all selectable output rates in continuous measurement mode. All three channels shall be
measured within a given output rate. Other output rates with maximum rate of 160 Hz can be achieved by monitoring
DRDY interrupt pin in single measurement mode.
Table 5: Data Output Rates
DO2 DO1
0
0
0
0
0
1
0
1
1
0
1
0
1
1
1
1
DO0 Typical Data Output Rate (Hz)
0
0.75
1
1.5
0
3
1
7.5
0
15 (Default)
1
30
0
75
1
220
14
www.honeywell.com