LSM303DLM Datasheet, PDF (27/38 Pages) STMicroelectronics – Sensor module:3-axis accelerometer and 3-axis magnetometer

LSM303DLM
Register description
9.1.5 CTRL_REG5_A (24h)
Table 29. CTRL_REG5_A register
0
0
0
0
0
0
TurnOn1 TurnOn0
9.1.6
9.1.7
Table 30.
TurnOn1,
TurnOn0
CTRL_REG5_A description
Turn-on mode selection for sleep-to-wakeup function. Default value: 00.
TurnOn bits are used for turning on the sleep-to-wakeup function.
Table 31. Sleep-to-wakeup configuration
TurnOn1
TurnOn0
Sleep-to-wakeup status
0
0
Sleep-to-wakeup function is disabled
Turned on: the device is in low-power mode
1
1
(ODR is defined in CTRL_REG1_A)
By setting the TurnOn [1:0] bits to 11, the “sleep-to-wakeup” function is enabled. When an
interrupt event occurs, the device goes into normal mode, increasing the ODR to the value
defined in CTRL_REG1_A. Although the device is in normal mode, CTRL_REG1_A content
is not automatically changed to “normal mode” configuration.
HP_FILTER_RESET_A (25h)
Dummy register. Reading at this address instantaneously zeroes the content of the internal
high-pass filter. If the high-pass filter is enabled, all three axes are instantaneously set to 0
g. This makes it possible to surmount the settling time of the high-pass filter.
REFERENCE_A (26h)
Table 32. REFERENCE_A register
Ref7
Ref6
Ref5
Ref4
Ref3
Ref2
Ref1
Ref0
Table 33. REFERENCE_A description
Ref7 - Ref0 Reference value for high-pass filter. Default value: 00h.
This register sets the acceleration value taken as a reference for the high-pass filter output.
When the filter is turned on (at least one FDS, HPen2, or HPen1 bit is equal to ‘1’) and HPM
bits are set to “01”, filter out is generated taking this value as a reference.
Doc ID 018725 Rev 1
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