User Manual

PNI Sensor Corporation Doc 1017252 r04
RM3100 & RM2100 Sensor Suite User Manual Page 36 of 45
Table 5-8: Measurement Results Registers
Register Description
Write Address
(Hex)
Read Address
(Hex)
X Axis Measurement (2)
24
A4
X Axis Measurement (1)
25
A5
X Axis Measurement (0)
26
A6
Y Axis Measurement (2)
27
A7
Y Axis Measurement (1)
28
A8
Y Axis Measurement (0)
29
A9
Z Axis Measurement (2)
2A
AA
Z Axis Measurement (1)
2B
AB
Z Axis Measurement (0)
2C
AC
Normally it is only necessary to send “A4
H
”, since the register value automatically
increments on the clock cycles such that after sending “A4
H
” all 3 bytes for the X axis
measurement would be clocked out, then the 3 bytes for the Y axis measurement, then the 3
bytes for the Z axis measurement. After these 9 bytes have been clocked out, the subsequent
output data has no relevance.
5.6 Troubleshooting and General Information
The MagI2C incorporates several registers that can be used to help troubleshoot the system
or device. These include the Built-In Self Test (BIST) register, the Handshake register, and
the RevID register.
5.6.1 Built-In Self Test Register (0x33)
The Built-In Self Test (BIST) register checks the status of the internal LR circuit
oscillator. Write to the BIST register by sending 0x33 followed by the BIST register
values, and request a read from the BIST register by sending 0xB3. The register contents
are defined below.
Bit #
7
6
5
4
3
2
1
0
Value
STE
ZOK
YOK
XOK
BW1
BW0
BP1
BP0
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