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AN4504 Fiches technique(PDF) 23 Page - STMicroelectronics |
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AN4504 Fiches technique(HTML) 23 Page - STMicroelectronics |
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23 / 41 page ![]() DocID026419 Rev 1 23/41 AN4504 Interrupt generation 41 The threshold module which is used by the system to detect any no-move or wake-up event is defined by the INT1_THS register. The threshold value is expressed over 7 bits as an unsigned number and is symmetrical around the zero-g level. XH (YH, ZH) is true when the unsigned angular rate value of the X (Y, Z) channel is higher than INT1_THS. Similarly, XL (YL, ZL) low is true when the unsigned angular rate value of the X (Y, Z) channel is lower than INT1_THS. Refer to Figure 10 for more details. Figure 10. NM_WU_CFG high and low 5.5.1 Wake-up Wake-up interrupt refers to a specific configuration of the INT1_CFG register that allows interrupt generation when the angular rate on the configured axis exceeds a defined threshold (Figure 11). Figure 11. Wake-up interrupt |
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