HMC5843 Datasheet, PDF (13/19 Pages) Honeywell Solid State Electronics Center – 3-Axis Digital Compass IC

HMC5843
The resolution of the HMC5843 is based on the gain selection (zero to 7) and the influence of the analog power supply rail
(AVDD). The following graph shows the interaction.
12
10
8
6
4
2
2.4
HMC5843 Resolution
2.6 2.8 3.0 3.2
AVDD (V)
Gain
0
1
2
3
4
5
6
7
Mode Register
The mode register is an 8-bit register from which data can be read or to which data can be written. This register is used to
select the operating mode of the device. MR0 through MR7 indicate bit locations, with MR denoting the bits that are in the
mode register. MR7 denotes the first bit of the data stream. The number in parenthesis indicates the default value of that
bit.
MR7 MR6
(0) (0)
MR5
MR4
MR3
MR2
(0)
(0)
(0)
(0)
Table 14: Mode Register
MR1
MR0
MD1 (1) MD0 (0)
Location
MR7 to
MR2
MR1 to
MR0
Name
Description
0
These bits must be cleared for correct operation.
MD1 to
MD0
Mode Select Bits. These bits select the operation mode of
this device.
Table 15: Mode Register Bit Designations
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