LSM303AGR Datasheet, PDF (33/68 Pages) STMicroelectronics – ultra-low-power 3D accelerometer and 3D magnetometer

LSM303AGR
Functionality
4.4.6
FIFO multiple read (burst)
Starting from Addr 28h multiple reads can be performed. Once the read reaches Addr 2Dh,
the system automatically restarts from Addr 28h.
Figure 9. FIFO multiple read
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4.5
Temperature sensor
The LSM303AGR is supplied with an internal temperature sensor. Temperature data can be
enabled by setting the TEMP_EN[1:0] bits to ‘1’ in the TEMP_CFG_REG_A (1Fh) register.
To retrieve the temperature sensor data the BDU bit in CTRL_REG4_A (23h) must be set
to ‘1’.
Both the OUT_TEMP_L_A (0Ch), OUT_TEMP_H_A (0Dh) registers must be read.
Temperature data is stored inside OUT_TEMP_H as two’s complement data in 8-bit format
left-justified.
4.6
Factory calibration
The IC interface is factory calibrated for sensitivity (LA_So, M_GN), Zero-g level (LA_TyOff)
and Zero-gauss level (M_TyOff).
The trim values are stored inside the device in nonvolatile memory. Anytime the device is
turned on, the trim parameters are downloaded into the registers to be used during active
operation. This allows using the device without further calibration.
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