BMA250 Bosch Sensortec, BMA250 Datasheet - Page 42

3-AXIS ACCELEROMETER DIGITAL I/F

BMA250

Manufacturer Part Number
BMA250
Description
3-AXIS ACCELEROMETER DIGITAL I/F
Manufacturer
Bosch Sensortec
Series
-r
Datasheets

Specifications of BMA250

Featured Product
BMA250 - Digital, Triaxial Acceleration Sensor
Axis
X, Y, Z
Acceleration Range
±2g, 4g, 8g, 16g
Sensitivity
256LSB/g, 128LSB/g, 64LSB/g, 16LSB/g
Voltage - Supply
1.62 V ~ 3.6 V
Output Type
I²C™, SPI™
Bandwidth
8Hz ~ 1kHz
Interface
I²C, SPI
Mounting Type
Surface Mount
Package / Case
12-VQFN
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
For Use With
828-1024 - BMA250 DAUGHTERCARD FOR DEV KIT
Other names
828-1023-2
5.10 Special control settings
Register (0x12) is reserved.
Register (0x13) contains settings for the configuration of the acceleration data acquisition and
the data output format.
(0x13) data_high_bw = ´0´ (´1´) selects filtered (unfiltered) acceleration data to be written into
the data registers (0x02) to (0x07). Default value of (0x13) data_high_bw is ´0´.
(0x13) shadow_dis = ´0´ (´1´) enables (disables) the shadowing procedure. Shadowing means
that the MSB register is updated by reading the corresponding LSB register. Default value of
(0x13) shadow_dis is ´0´.
Table 38: Acceleration data acquisition & data output format, register (0x13)
Bit 7
Bit 6
Bit 5
data_high
shadow
reserved
_bw
_dis
Register (0x14) is the softreset register. A user-triggered reset (softreset) of the sensor is
performed after writing ´0xB6´ to the softreset register. After that reset all registers return to their
default values. Reading (0x14) softreset returns 0x00.
Register (0x15) is reserved.
5.11 Interrupt settings
Registers (0x16) and (0x17) contain the enable bits for the interrupts. Default value of each
enable bit is ´0´.
Table 39: Interrupt setting, register (0x16)
(0x16) Bit
Name
Bit 7
flat_en
Bit 6
orient_en
Bit 5
s_tap_en
Bit 4
d_tap_en
Bit 3
- reserved -
Bit 2
slope_en_z
Bit 1
slope_en_y
Bit 0
slope_en_x
Rev. 1.0
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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.
BMA250
Data sheet
Bit 4
Bit 3
Bit 2
reserved
reserved
reserved
Description
´1´ (´0´) enables (disables) flat interrupt
´1´ (´0´) enables (disables) orientation interrupt
´1´ (´0´) enables (disables) single tap interrupt
´1´ (´0´) enables (disables) double tap interrupt
reserved
´1´ (´0´) enables (disables) slope interrupt for z-axis
´1´ (´0´) enables (disables) slope interrupt for y-axis
´1´ (´0´) enables (disables) slope interrupt for x-axis
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Bosch Sensortec
Bit 1
Bit 0
reserved
reserved
03 March 2011

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