AIS2IH datasheet(18/63 Pages) STMICROELECTRONICS

Part #	AIS2IH

Description	MEMS digital output motion sensor: high-performance 3-axis accelerometer for automobile applications

PDF	63 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

18 / 63 page

Application hints

Figure 6. AIS2IH electrical connections (top view)

SDA/SDI/SDO

SCL/SPC

10µF

100nF

GND

SDO/SA0

AIS2IH

HOST

I2C / SPI (3/4-w)

SCL

SDA

Vdd_IO

Rpu

Pull-up to be added

Rpu=10kOhm

I2C configuration

Vdd_IO

100nF

GND

VDD

Vdd

RES

GND

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 6). 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 are selectable and accessible through the I²C

or SPI interfaces. When using the I²C, CS must be tied high (i.e. connected to Vdd_IO).

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.

AIS2IH

Application hints

DS12421 - Rev 4

page 18/63

AIS2IH Datasheet(PDF) 18 Page - STMicroelectronics