BMA250 SHUTL Bosch Sensortec, BMA250 SHUTL Datasheet - Page 10

• Manufacturer Part Number: BMA250 SHUTL
• Description: BMA250 DAUGHTERCARD FOR DEV KIT
• Manufacturer: Bosch Sensortec
• Series: -r

Specifications of BMA250 SHUTL

• Featured Product: BMA250 - Digital, Triaxial Acceleration Sensor
• Sensor Type: Accelerometer, 3 Axis
• Sensing Range: ±2g, 4g, 8g, 16g
• Interface: -
• Sensitivity: 256LSB/g, 128LSB/g, 64LSB/g, 16LSB/g
• Voltage - Supply: -
• Embedded: No
• Utilized Ic / Part: BMA250
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 828-1024

3. Block diagram
Figure 1 shows the basic building blocks of the BMA250:
4. Functional description
Note: Default values for registers can be found in chapter 5.
4.1 Power management
The BMA250 has two distinct power supply pins:
• V
• V
There are no limitations on the voltage levels of both pins relative to each other, as long as each
of them lies within its operating range. Furthermore, the device can be completely switched off
(V
(V
device is in low-power mode or suspend mode while V
consumption on the V
It is absolutely prohibited to keep any interface at a logical high level when V
Such a configuration will permanently damage the device (i.e. if V
& CSB] ≠ high).
The device contains a power-on reset (POR) generator. It resets the logic part and the register
values after powering-on V
Rev. 1.0
© 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.
DD
DDIO
DD
DDIO
= 0V) while keeping the V
is the main power supply for all internal analog and digital functional blocks;
= 0V) and keep the internal supply on (V
is a separate power supply pin, exclusively used for the supply of the digital interface.
DD
supply (non-destructive).
DD
Figure 1: Block diagram of BMA250
and V
DDIO
Page 10 / not for publishing
DDIO
supply on (V
. There is no limitation on the sequence of switching on
Data sheet
BMA250
DD
DDIO
> 0V) is safe only in normal mode. If the
> 0V). To switch off the interface supply
DDIO
= 0V, there is a risk of excess current
DDIO
= 0  [SDI & SDO & SCK
DDIO
Bosch Sensortec
03 March 2011
is switched off.