6.3

Device power up sequence

To power on the device:

•

Provide all the external supplies (VCORE, VDDIO, VANA) according to the device characteristics described

in Section 8: Electrical characteristics. As long as XSHUTDOWN is low, the device is in HW_STANDBY

state.

•

You can switch on the external supplies and CLKIN in any order.

•

Set XSHUTDOWN to high.

Figure 12. Power up sequence

The device has power-on-reset (POR) detection cells with hysteresis on VCORE and VDDIO power supplies.

POR is released after a typical delay of 20 μs on the rising edge.

Bursts with a duration of less than 2 μs (typical) are ignored.

Table 8. POR typical threshold

Supply

POR typical threshold rising edge (V) POR typical threshold falling edge (V)

VCORE

0.65

0.55

VDDIO

1.1

0.95

6.4

Device power down sequence

The power down sequence must be done as follows:

1. If the sensor is in STREAMING state, then set it to SW_STANDBY state and wait for the command to

complete.

2. Set XSHUTDOWN to low.

3. External supplies can be switched off in any order, as well as CLKIN.

VD66GY

Application schematic

DS13838 - Rev 7

page 21/37