BMA150 datasheet(34/56 Pages) BOSCH

34 / 56 page

Data sheet

BMA150

Triaxial, digital acceleration sensor

Bosch Sensortec

Rev. 1.6

Page 34

30 October 2008

as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.

Note: Specifications within this document are subject to change without notice.

Start and stop conditions:

Data transfer begins by a falling edge on SDA when SCK is high (start condition (S) indicated by

I²C bus master). Stop condition (P) is a rising edge on SDA when SCK is high (see figure 12).

Bit transfer:

One data bit is transferred during each SCK pulse. Data on SDA line must remain stable during

high period of SCK pulse (see figure 13).

Acknowledge:

After start condition each byte of data transfer is followed by an acknowledge bit. The

transmitter let the SDA line high (no pull down) and generates a high SCK pulse. If BMA150 has

been addressed and data transfer has performed correctly it generates a low SDA level (active

pull down). Then SDA line is let free enabling the next transfer (see figure 14).

Figure 12: Timing diagram for I²C start and stop condition (SDI=SDA)

SDI

SCK

Start condition

Stop condition

BMA150 Datasheet(PDF) 34 Page - Bosch Sensortec GmbH