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VL53L1 データシート(PDF) 12 Page - STMicroelectronics |
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VL53L1 データシート(HTML) 12 Page - STMicroelectronics |
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12 / 35 page  Functional description VL53L1X 12/35 DocID031281 Rev 3 2.6 Power sequence 2.6.1 Power up and boot sequence There are two options available for device power up/boot. Option 1: the XSHUT pin is connected and controlled from the host. This option optimizes power consumption as the VL53L1X can be completely powered off when not used, and then woken up through a host GPIO (using the XSHUT pin). Hardware (HW) standby mode is defined as the period when the power supply is present and XSHUT is low. Figure 7. Power up and boot sequence Note: Boot duration is 1.2ms max. Option 2: the XSHUT pin is not controlled by the host, it is tied to the power supply value through the pull up resistor. When the XSHUT pin is not controlled, the power up sequence is presented in Figure 8. In this case, the device goes automatically to Software (SW) standby after boot, without entering HW standby. Figure 8. Power up and boot sequence with XSHUT not controlled Note: Boot duration is 1.2 ms max. Note: In all cases, XSHUT has to be raised only when the power supply is tied on. |
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