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VL6624 数据表(PDF) 13 Page - STMicroelectronics |
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VL6624 数据表(HTML) 13 Page - STMicroelectronics |
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13 / 106 page  VL6624/VS6624 Operational modes 13/106 4 Operational modes VL6624/VS6624 has a number of operational modes. The power down mode is entered and exited by driving the hardware CE signal. Transitions between all other modes are initiated by I²C transactions from the host system or automatically after time-outs. Figure 2. State machine at power -up and user mode transitions Power Down/Up The power down state is entered from all other modes when CE is pulled low or the supplies are removed. During the power-down state (CE = logic 0) ● The internal digital supply of the VL6624/VS6624 is shut down by an internal switch mechanism. This method allows a very low power-down current value. ● The device input / outputs are fail-safe, and consequently can be considered high impedance. Supplies Off Standby Power-Down CE pin LOW CE pin Pause Mode Supplies turned-off Supplies turned-on & CE pin LOW Supplies turned-off 1 Stop Mode Run Mode HIGH State Machine at power-up I2C controlled user mode transitions Uninitialised - Flashgun Note; Depending on the snapshot exit transition settings the device will revert to RUN or PAUSE state automatically after snapshot It is possible to enter any of the user modes direct from the uninitialised state via an I2C command System state changes Host initiated state changes Snapshot |
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