AN4506 datasheet(10/47 Pages) STMICROELECTRONICS

10 / 47 page

Operating modes

AN4506

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DocID026442 Rev 2

Table 4 shows the typical values of power consumption for the different operating modes.

Power consumption in Normal mode is independent of the selected ODR.

2.1

Power-down mode

When the device is in Power-down mode, almost all internal blocks of the device are

switched off to minimize power consumption. Digital interfaces (I2C and SPI) are still active

to allow communication with the device. The content of the configuration registers is

preserved and output data registers are not updated, therefore keeping the last data

sampled in memory before going into Power-down mode.

2.2

Sleep mode

While the device is in Sleep mode the driving circuitry making the moving mass of the

gyroscope oscillating is kept active. Turn-on time from Sleep mode to Normal mode is

drastically reduced.

2.3

Low ODR mode

In this mode low speed ODRs are enabled. After setting the Low_ODR bit to ‘1’ in the

LOW_ODR register (39h), three low-speed ODRs can be chosen through the DR1 and DR0

bits in the CTRL1 register: 12.5 Hz, 25 Hz and 50 Hz.

Refer to Table 3 for ODR and bandwidth configurations.

Data interrupt generation is active and configured through the IG_CFG register.

2.4

Normal mode

In Normal mode, data are generated at the data rate (ODR) selected through the DR bits.

Data interrupt generation is active and configured through the IG_CFG register.

Table 4. Power consumption

Operating mode

Power consumption (Vdd = 3 V)

Power-down

0.5 μA

Sleep

2.4 mA

Normal

4.8 mA

AN4506 Datasheet(PDF) 10 Page - STMicroelectronics