LSM303AGR datasheet(33/68 Pages) STMICROELECTRONICS

No de pièce	LSM303AGR

Description	Ultra-compact high-performance eCompass module: ultra-low-power 3D accelerometer and 3D magnetometer

PDF	68 Pages

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Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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DocID027765 Rev 5

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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

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.

LSM303AGR Fiches technique(PDF) 33 Page - STMicroelectronics