HMC5843 Honeywell, HMC5843 Datasheet - Page 12

• Manufacturer Part Number: HMC5843
• Manufacturer: Honeywell

Specifications of HMC5843

• Lead Free Status / Rohs Status: Supplier Unconfirmed

HMC5843
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.
The Table below shows minimum output data rates given PVT conditions. All three channels shall be measured within a
given data rate.
12
CRA7
(0)
Location
CRA7 to CRA5
CRA4 to CRA2
CRA1 to CRA0
DO2
0
0
0
0
1
1
1
1
MS1
0
0
1
1
DO1
0
0
1
1
0
0
1
1
0
1
0
1
MS0
CRA6
(0)
DO0
0
1
0
1
0
1
0
1
Mode
Normal measurement configuration (default). In normal measurement
configuration the device follows normal measurement flow. The positive and
negative pins of the resistive load are left floating and high impedance.
Positive bias configuration. In positive bias configuration, a positive current
is forced across the resistive load.
Negative bias configuration. In negative bias configuration, a negative
current is forced across the resistive load.
This configuration is not used.
Table 5: Configuration Register A Bit Designations
Name
0
DO2 to DO0
MS1 to MS0
Minimum Data Output Rate (Hz)
0.5
1
2
5
10 (default)
20
50
Not used
CRA5
(0)
Table 4: Configuration Register A
Table 7: Measurement Modes
Table 6: Data Output Rates
CRA4
DO2 (1)
Description
These bits must be cleared for correct operation.
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 to the sensor into the
measurement.
CRA3
DO1 (0)
CRA2
DO0 (0)
CRA1
MS1 (0)
CRA0
MS0 (0)
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