ASM330LXH datasheet(17/56 Pages) STMICROELECTRONICS

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ASM330LXH

Module specifications

2.7

Functionality

2.7.1

Operating mode

The ASM330LXH has two operating modes available: only accelerometer active and

gyroscope in power-down or both accelerometer and gyroscope sensors active at the same

ODR. Switching from one mode to the other requires one write operation: writing to

CTRL1_XL (10h) the accelerometer operates in normal mode and the gyroscope is

powered down; writing to CTRL2_G (11h) both accelerometer and gyroscope are activated

at the same ODR.

For further information in order to enable one operating mode from the power down, please

refer to Figure 4: Switching operating modes.

Figure 4. Switching operating modes

2.7.2

Multiple reads (burst)

When only the accelerometer is activated and the gyroscope is in power down, starting from

OUT_TEMP_L (20h), OUT_TEMP_H (21h) multiple reads can be performed. Once the read

reaches OUTZ_XL (2Ch - 2Dh), the system automatically restarts from OUTX_XL (28h -

29h) (see Figure 5).

Figure 5. Multiple reads: accelerometer only

When both accelerometer and gyroscope sensors are activated at the same ODR, starting

from OUT_TEMP_L (20h), OUT_TEMP_H (21h) multiple reads can be performed. Once the

read reaches OUTZ_XL (2Ch - 2Dh) the system automatically restarts from OUTX_G (22h -

23h) (see Figure 6).

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