VD5377 datasheet(52/88 Pages) STMICROELECTRONICS

52 / 88 page

Basic start-up information

VD5377

52/88

Doc ID 022952 Rev 2

Figure 22. Automatic mode to low power standby mode

Sensor in auto power mode with

“use standby pin” set.

Standby pin high - I2C unavailable

Set standby pin low

(I2C enabled)

Read register 0x05

Change bit 3 to 0 (host_config_done)

Write new value to register 0x05

Read register 0x05 until sensor goes

into software standby

that is, register 0x05[7:5] = 0x01

Write manual mode (bit[0] = 0) and

host_config_done (bit[3] = 1) to

Set standby pin high

Standby

Set standby pin low

Read register 0x05

Change bit 3 to 0 (host_config_done)

Write new value to register 0x05

Read register 0x05 until sensor goes

into software standby

that is, register 0x05[7:5] = 0x01

Write manual mode (bit[0] = 0) and

host_config_done (bit[3] = 1) to

Set standby pin high

Sensor could be in any of the

auto run/sleep modes

Set sensor in software standby mode

Wait until sensor goes into software

standby mode

Set sensor in manual run mode

Manual standby mode

(typical current = 15 uA)

Set sensor in software standby mode

Wait until sensor goes into software

standby mode

Set sensor in manual run mode

I2C disabled

Sensor in manual run mode

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