LSM303DLHC datasheet(18/43 Pages) STMICROELECTRONICS

部件名	LSM303DLHC

功能描述	Ultra compact high performance e-compass 3D accelerometer and 3D magnetometer module

PDF	43 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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18 / 43 page

Digital interfaces

LSM303DLHC

18/42

Doc ID 018771 Rev 1

Digital interfaces

The registers embedded inside the LSM303DLHC are accessible through two separate I2C

serial interfaces, one for the accelerometer core and one for the magnetometer core.

5.1

I2C serial interface

The LSM303DLHC I2C is a bus slave. The I2C is employed to write the data into the

registers whon also be read back.

The relevant I2C terminology is given in the table below.

There are two signals associated with the I2C bus, the serial clock line (SCL) and the serial

data line (SDA). The latter is a bidirectional line used for sending and receiving the data

to/from the interface.

Table 9.

Serial interface pin description

PIN Name

PIN Description

SCL

I2C serial clock (SCL)

SDA

I2C serial data (SDA)

Table 10.

Serial interface pin description

Term

Description

Transmitter

The device which sends data to the bus

Receiver

The device which receives data from the bus

Master

The device which initiates a transfer, generates clock signals, and terminates a

transfer

Slave

The device addressed by the master

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