LSM303AGR datasheet(32/68 Pages) STMICROELECTRONICS

Part #	LSM303AGR

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

PDF	68 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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32 / 68 page

Functionality

LSM303AGR

32/68

DocID027765 Rev 5

When an interrupt event is configured on the INT_1_XL pin, the FIFO operates in Stream

mode if the INT_1_XL pin value is equal to ‘0’ and it operates in FIFO mode if the INT_1_XL

pin value is equal to ‘1’. Switching modes is dynamically performed according to the

INT_1_XL pin value.

Stream-to-FIFO can be used in order to analyze the sampling history that generates an

interrupt. The standard operation is to read the contents of FIFO when the FIFO mode is

triggered and the FIFO buffer is full and stopped.

4.4.5

Retrieving data from FIFO

FIFO data is read from the OUT_X_L_A (28h), OUT_X_H_A (29h), OUT_Y_L_A (2Ah),

OUT_Y_H_A (2Bh), and OUT_Z_L_A (2Ch), OUT_Z_H_A (2Dh) registers. A read operation

using a serial interface of the OUT_X_L_A (28h), OUT_X_H_A (29h), OUT_Y_L_A (2Ah),

OUT_Y_H_A (2Bh) or OUT_Z_L_A (2Ch), OUT_Z_H_A (2Dh) output registers provides the

data stored in the FIFO. Each time data is read from the FIFO, the oldest X, Y and Z data

are placed in the OUT_X_L_A (28h), OUT_X_H_A (29h), OUT_Y_L_A (2Ah), OUT_Y_H_A

(2Bh) and OUT_Z_L_A (2Ch), OUT_Z_H_A (2Dh) registers and both single read and

read_burst operations can be used.

LSM303AGR Datasheet(PDF) 32 Page - STMicroelectronics