Setting The Cmm Update Rate With Tmrc (0X0B) - PNI RM3100 User Manual

5.2.1 Setting the CMM Update Rate with TMRC (0x0B)

The time between measurements in Continuous Measurement Mode is established with
the TMRC register. The TMRC register is defined below.
Bit # 7
Value 1
The LSB is used set the CMM updatee rate. The MSB should be 0x9, as indicated above.
The larger the TMRC value, the longer the interval between measurements. Available
data rates are given in Table 5-4. Note that the update rates are approximate, and have a
one standard deviation tolerance of about ~7%. The default value for TMRC is 0x96,
establishing a data update rate of ~37 Hz.
To set the TMRC register, send the register address, 0x0B, followed by the desired
TMRC register value. To read the TMRC register, send 0x8B.
Note: The Cycle Count Registers establish the maximum data rate of the sensors. For instance,
if the cycle count is set to 200
to 0x92, indicating an update rate of ~600 Hz, the rate established by the cycle count will override
the TMRC request, and the actual update rate will be ~430 Hz.
PNI Sensor Corporation
RM3100 & RM2100 Sensor Suite User Manual
6 5 4
0 0 1 TMRC3
, then the maximum 3-axis update rate is ~430 Hz. If TMRC is set
D
3 2 1
TMRC2 TMRC1 TMRC0
0
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