AN4506 datasheet(11/47 Pages) STMICROELECTRONICS

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AN4506

Reading angular rate data

DocID026442 Rev 2

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2.5

Switching modes

The delay in order to switch modes is shown in Table 5.

Reading angular rate data

3.1

Startup sequence

Once the device is powered up, it automatically downloads the calibration coefficients from

the embedded flash to the internal registers. When the boot procedure is completed, i.e.

after approximately 10 milliseconds, the device automatically enters Power-down mode. To

turn on the device and gather angular rate data, it is necessary to select Normal (or Low

ODR) mode and to enable at least one of the axes.

The following general-purpose sequence can be used to configure the device:

Table 5. Turn-on time

Starting mode

Target mode

Turn-on time - typ.

Power-down

Normal

100 ms

Power-down

Sleep

100 ms

Power-down

Self test

100 ms

Sleep

Normal

1/ODR: LPF2 disabled

6/ODR: LPF2 enabled

Sleep

Power-down

Immediate

Normal

Sleep

Immediate

Normal

Power-down

Immediate

Other settings change

1/ODR: LPF2 disabled

6/ODR: LPF2 enabled

Write CTRL2

Write CTRL3

Write CTRL4

Write CTRL6

Write Reference

Write IG_THS

Write IG_DURATION

Write IG_CFG

Write CTRL5

10. Write CTRL1

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