BMC150 datasheet(40/141 Pages) ETC2

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Datasheet

eCompass BMC150

Page 40

Confidential

BST-BMC150-DS000-03 | Revision 0.4 | February 2013

Bosch Sensortec

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. Not intended for publication.

4.7.3 Electrical behavior (INT pin# to open-drive or push-pull)

Both interrupt pins can be configured to show the desired electrical behavior. 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.

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

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