BMA250 Bosch Sensortec, BMA250 Datasheet - Page 56
Manufacturer Part Number
3-AXIS ACCELEROMETER DIGITAL I/F
Specifications of BMA250
BMA250 - Digital, Triaxial Acceleration Sensor
X, Y, Z
±2g, 4g, 8g, 16g
256LSB/g, 128LSB/g, 64LSB/g, 16LSB/g
Voltage - Supply
1.62 V ~ 3.6 V
8Hz ~ 1kHz
Package / Case
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With
828-1024 - BMA250 DAUGHTERCARD FOR DEV KIT
For single byte read as well as write operations, 16-bit protocols are used. The BMA250 also
supports multiple-byte read operations.
In SPI 4-wire configuration CSB (chip select low active), SCK (serial clock), SDI (serial data
input), and SDO (serial data output) pins are used. The communication starts when the CSB is
pulled low by the SPI master and stops when CSB is pulled high. SCK is also controlled by SPI
master. SDI and SDO are driven at the falling edge of SCK and should be captured at the rising
edge of SCK.
The basic write operation waveform for 4-wire configuration is depicted in figure 11. During the
entire write cycle SDO remains in high- impedance state.
The basic read operation waveform for 4-wire configuration is depicted in figure 12:
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such
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.
Figure 11: 4-wire basic SPI write sequence (mode ´11´)
Figure 12: 4-wire basic SPI read sequence (mode ´11´)
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03 March 2011