LIS2DH12 datasheet(20/53 Pages) STMICROELECTRONICS

20 / 53 page

Application hints

LIS2DH12

20/53

DocID025056 Rev 6

Application hints

Figure 5. LIS2DH12 electrical connections

The device core is supplied through the Vdd line while the I/O pads are supplied through the

Vdd_IO line. Power supply decoupling capacitors (100 nF ceramic, 10 μF aluminum) should

be placed as near as possible to pin 9 of the device (common design practice).

All the voltage and ground supplies must be present at the same time to have proper

behavior of the IC (refer to Figure 5). It is possible to remove Vdd while maintaining Vdd_IO

without blocking the communication bus, in this condition the measurement chain is

powered off.

The functionality of the device and the measured acceleration data is selectable and

accessible through the I2C or SPI interfaces. When using the I2C, CS must be tied high.

The functions, the threshold and the timing of the two interrupt pins (INT1 and INT2) can be

completely programmed by the user through the I2C/SPI interface.

Vdd_IO

Digital signal from/to signal controller. Signal levels are defined by proper selection of Vdd_IO

10μF

Vdd

100nF

GND

SCL/SPC

SDA/SDI/SDO

SDO/SA0

GND

Vdd_IO

GND

Vdd

100nF

LIS2DH12 数据表(PDF) 20 Page - STMicroelectronics