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Data sheet

BMA220

Page 30

BST-BMA220-DS003-08 | Revision 1.15 | August 2011 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.

5.9 Data ready detection

This interrupt provides the possibility of synchronously reading out data from the BMA220

without missing a single data point. The data update detection monitors the data_update signals

for all axes. It generates an interrupt as soon as the acceleration values for all enabled axes

have been updated. The signal en_x_channel, en_y_channel and en_z_channel are the enable

signals for the data conversion from each axis accordingly. The three enable signals can be

configured by users (see section 4.1.4). For example, if all three axes are enabled, the interrupt

is generated after updated signals for x-, y-, and z-axes have been detected.

When data ready detection is activated, all other interrupts are not propagated to the INT pin.

However their status can still be obtained from the appropriate registers.

When the data-ready interrupt is not latched, the interrupt is cleared automatically after ~150μs.

Table 14: Control and status register for low

Name Description Number of bits Reset-value

en_data enable signal for data-ready detection 1 ‘0’

data_int

whether data-ready interrupt has been

triggered (0=no, 1=yes)

1 ‘0’

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 ... 62 63

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Bosch MAN-REG-X-08 Especificaciones Pagina 30