BMA253
Data sheet
Page 26
4.7 Interrupt controller
The BMA253 is equipped with eight programmable interrupt engines. Each interrupt can be
independently enabled and configured. If the trigger condition of an enabled interrupt is fulfilled,
the corresponding status bit is set to ´1´ and the selected interrupt pin is activated. The BMA253
provides two interrupt pins, INT1 and INT2; interrupts can be freely mapped to any of these
pins. The state of a specific interrupt pin is derived from a logic ´or´ combination of all interrupts
mapped to it.
The interrupt status registers are updated when a new data word is written into the acceleration
data registers. If an interrupt is disabled, all active status bits associated with it are immediately
reset.
4.7.1 General features
An interrupt is cleared depending on the selected interrupt mode, which is common to all
interrupts. There are three different interrupt modes: non-latched, latched, and temporary. The
mode is selected by the (0x21) latch_int bits according to Table 10.
Table 10: Interrupt mode selection
(0x21)
Interrupt mode
latch_int
0000b
0001b
0010b
0011b
0100b
0101b
0110b
0111b
1000b
1001b
1010b
1011b
1100b
1101b
1110b
1111b
non-latched
temporary, 250ms
temporary, 500ms
temporary, 1s
temporary, 2s
temporary, 4s
temporary, 8s
latched
non-latched
temporary, 250µs
temporary, 500µs
temporary, 1ms
temporary, 12.5ms
temporary, 25ms
temporary, 50ms
latched
An interrupt is generated if its activation condition is met. It can not be cleared as long as the
activation condition is fulfilled. In the non-latched mode the interrupt status bit and the selected
pin (the contribution to the ´or´ condition for INT1 and/or INT2) are cleared as soon as the
activation condition is no more valid. Exceptions to this behavior are the new data, orientation,
and flat interrupts, which are automatically reset after a fixed time.
BST-BMA253-DS000-01 | Revision 1.0 | August 2015
Bosch Sensortec
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such 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.
BOSCH [ Bosch Sensortec GmbH ]
