PNI RM3100 Evaluation Board - Manual (Page 26)

PNI Sensor Corporation Doc 1017252 r02
RM3100 Evaluation Board User Manual Page 25 of 33
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 RM3100 Evaluation Board 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 BIST Register (0x33)
The 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
`