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AN2960 Datasheet(PDF) 25 Page - STMicroelectronics |
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AN2960 Datasheet(HTML) 25 Page - STMicroelectronics |
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25 / 41 page  AN2960 Free-fall and wake-up registers Doc ID 15557 Rev 1 25/41 8 Free-fall and wake-up registers The following sections describe the registers that are involved in the generation of the interrupt signals associated with inertial wake-up and free-fall events. 8.1 HP_FILTER_RESET (23h) Dummy register. A reading at this address forces the high-pass filter to recover instantaneously the dc level of the acceleration signal provided to its inputs. After the above reading, the output of the high-pass filter is zero. 8.2 FF_WU_CFG_1 (30h) Free-fall and wake-up configuration register for interrupt source 1. . XX XX XX XX AOI LIR ZHIE ZLIE YHIE YLIE XHIE XLIE AOI And/Or combination of interrupt events. Default value: 0 (0: OR combination of interrupt events; 1: AND combination of interrupt events) LIR Latch interrupt request to FF_WU_SRC reg with the FF_WU_SRC reg cleared by reading FF_WU_SRC_1 reg. Default value: 0 (0: interrupt request not latched; 1: interrupt request latched) ZHIE Enable interrupt generation on Z high event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold) ZLIE Enable interrupt generation on Z low event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold) YHIE Enable interrupt generation on Y high event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold) YLIE Enable interrupt generation on Y low event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold) XHIE Enable interrupt generation on X high event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value higher than preset threshold) XLIE Enable interrupt generation on X low event. Default value: 0 (0: disable interrupt request; 1: enable interrupt request on measured accel. value lower than preset threshold) |
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