BMA250 SHUTL Bosch Sensortec, BMA250 SHUTL Datasheet - Page 25

• 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

setting bits (0x20) int1_od / (0x20) int2_od to ´0´, the interrupt pin output type gets open-drive,
by setting the configuration bits to ´1´, the output type gets push-pull.
Remark: Due to their use for sub-mode selection in dedicated mode, the states of both INT pins
are not defined during the first 2 ms after power-up.
4.8.4 New data interrupt
This interrupt serves for synchronous reading of acceleration data. It is generated after storing a
new value of z-axis acceleration data in the data register. The interrupt is cleared automatically
when the next cycle of data acquisition starts. The interrupt status is ´0´ for at least 50μs.
The interrupt mode of the new data interrupt is fixed to non-latched.
It is enabled (disabled) by writing ´1´ (´0´) to bit (0x17) data_en. The interrupt status is stored in
bit (0x0A) data_int.
4.8.5 Any-motion (slope) detection
Any-motion detection uses the slope between successive acceleration signals to detect
changes in motion. An interrupt is generated when the slope (absolute value of acceleration
difference) exceeds a preset threshold. It is cleared as soon as the slope falls below the
threshold. The principle is made clear in figure 6.
Rev. 1.0
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Note: Specifications within this document are subject to change without notice.
acceleration
slope_th
slope
INT
acc(t
0
−1/(2*bw))
Figure 6: Principle of any-motion detection
acc(t
slope_dur
slope(t
0
Page 25 / not for publishing
)
0
)=acc(t
slope_dur
Data sheet
0
BMA250
)−acc(t
0
−1/(2*bw))
time
time
time
Bosch Sensortec
03 March 2011