Information

BMA250E
Data sheet
Page 28
BST-BMA250E-DS004-06 | Revision 1.3 | April 2015 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
4.7.3 Electrical behaviour (INT pin# to open-drive or push-pull)
Both interrupt pins can be configured to show the desired electrical behaviour. The ´active´ level
of each interrupt pin is determined by the (0x20) int1_lvl and (0x20) int2_lvl bits.
If (0x20) int1_lvl = ´1´ (´0´) / (0x20) int2_lvl = ´1´ (´0´), then pin “INT1” / pin “INT2” is active ´1´
(´0´). The characteristic of the output driver of the interrupt pins may be configured with bits
(0x20) int1_od and (0x20) int2_od. By setting bits (0x20) int1_od / (0x20) int2_od to ´1´, the
output driver shows open-drive characteristic, by setting the configuration bits to ´0´, the output
driver shows push-pull characteristic. When open-drive characteristic is selected in the design,
external pull-up or pull-down resistor should be applied according the int_lvl configuration.
4.7.4 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 data acquisition cycle 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.
Due to the settling time of the filter, the first interrupt after wake-up from suspend or standby
mode will take longer than the update time.