LSM6DS3US datasheet(33/104 Pages) STMICROELECTRONICS

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LSM6DS3US

Functionality

104

5.5.5

Bypass-to-Continuous mode

In Bypass-to-Continuous mode (FIFO_CTRL5 (0Ah) (FIFO_MODE_[2:0] = '100'), data

measurement storage inside FIFO operates in Continuous mode when selected triggers in

one of the following interrupt registers FUNC_SRC (53h), TAP_SRC (1Ch),

WAKE_UP_SRC (1Bh) and D6D_SRC (1Dh) are equal to '1', otherwise FIFO content is

reset (Bypass mode).

5.5.6

FIFO reading procedure

The data stored in FIFO are accessible from dedicated registers (FIFO_DATA_OUT_L

(3Eh) and FIFO_DATA_OUT_H (3Fh)) and each FIFO sample is composed of 16 bits.

All FIFO status registers (FIFO_STATUS1 (3Ah), FIFO_STATUS2 (3Bh), FIFO_STATUS3

(3Ch), FIFO_STATUS4 (3Dh)) can be read at the start of a reading operation, minimizing

the intervention of the application processor.

Saving data in the FIFO buffer is organized in four FIFO data sets consisting of 6 bytes

each:

The 1st FIFO data set is reserved for gyroscope data;

The 2nd FIFO data set is reserved for accelerometer data;

The 3rd FIFO data set is reserved for the external sensor data stored in the registers from

SENSORHUB1_REG (2Eh) to SENSORHUB6_REG (33h);

The 4th FIFO data set can be alternately associated to the external sensor data stored in the

registers from SENSORHUB7_REG (34h) to SENSORHUB12_REG(39h), to the step

counter and timestamp info, or to the temperature sensor data.

5.5.7

Filter block diagrams

Figure 6. Accelerometer chain

LSM6DS3US Datasheet(PDF) 33 Page - STMicroelectronics