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LSM6DB0 数据表(PDF) 27 Page - STMicroelectronics |
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LSM6DB0 数据表(HTML) 27 Page - STMicroelectronics |
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27 / 66 page ![]() DocID025603 Rev 1 27/66 LSM6DB0 Accelerometer and gyroscope functionality 66 Figure 10. FIFO mode 7.2.3 Continuous mode Continuous mode (FIFO_CTRL (2Eh)(FMODE[2:0] = 110) provides a continuous FIFO update: as new data arrives, the older is discarded. A FIFO threshold flag FIFO_SRC (2Fh)(FTH) is asserted when the number of unread samples in FIFO is greater than or equal to FIFO_CTRL (2Eh)(FTH4:0). It is possible to route FIFO_SRC (2Fh)(FTH) to the INT1 pin by writing the INT_FTH bit to ‘1’ in register INT1_CTRL (0Ch). A full-flag interrupt can be enabled, INT1_CTRL (0Ch) (INT_ FSS5)= '1', when the FIFO becomes saturated and in order to read the contents all at once. If an overrun occurs, the oldest sample in FIFO is overwritten and the OVRN flag in FIFO_SRC (2Fh) is asserted. In order to empty the FIFO before it is full, it is also possible to pull from FIFO the number of unread samples available in FIFO_SRC (2Fh) (FSS[5:0]). Figure 11. Continuous mode x0 yi z0 y0 x1 y1 z1 x2 y2 z2 x31 y31 z31 xi,yi,zi x0 y0 z0 x1 y1 z1 x2 y2 z2 x31 y31 z31 xi,yi,zi x30 y30 z30 |
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