AN4650 datasheet(17/102 Pages) STMICROELECTRONICS

17 / 102 page

DocID027415 Rev 1

17/102

AN4650

Operating modes

102

Operating modes

The LSM6DS3 provides three possible operating configurations:



only accelerometer active and gyroscope in Power-Down;



only gyroscope active and accelerometer in Power-Down;



both accelerometer and gyroscope active with independent ODR.

After the power supply is applied, the LSM6DS3 performs a 20 ms boot procedure to load

the trimming parameters. After the boot is completed, both the accelerometer and the

gyroscope are automatically configured in Power-Down mode.

The accelerometer and the gyroscope can be independently configured in four different

power modes: Power-Down, Low-Power, Normal and High-Performance mode. They are

allowed to have different data rates without any limit. The gyroscope sensor can also be set

in Sleep mode to reduce its power consumption.

When both the accelerometer and gyroscope are on, the accelerometer is synchronized

with the gyroscope and the data rates of the two sensors are integer multiples of each other.

If the accelerometer and the gyroscope have been configured with the same output data

rate, the gyroscope data-ready signal (DRDY_G) is always subsequent to the

accelerometer data-ready signal (DRDY_XL); in this case, for synchronous reading of the

two sensors, it is convenient to use the gyroscope data-ready signal.

Referring to the LSM6DS3 datasheet, the output data rate (ODR_XL) bits of CTRL1_XL

used to select the power mode and the output data rate of the accelerometer sensor

(Table 3).

The output data rate (ODR_G) bits of CTRL2_G register and the High-Performance disable

(G_HM_MODE) bit of CTRL7_G register are used to select the power mode and output data

rate of the gyroscope sensor (Table 4).

Table 3. Accelerometer ODR and power mode selection

ODR_XL [3:0]

ODR [Hz] when

XL_HM_MODE = 1

ODR [Hz] when

XL_HM_MODE = 0

0000

Power Down

0001

13 Hz (Low Power)

13 Hz (High Performance)

0010

26 Hz (Low Power)

26 Hz (High Performance)

0011

52 Hz (Low Power)

52 Hz (High Performance)

0100

104 Hz (Normal mode)

104 Hz (High Performance)

0101

208 Hz (Normal mode)

208 Hz (High Performance)

0110

416 Hz (High Performance)

0111

833 Hz (High Performance)

1000

1.66 kHz (High Performance)

1001

3.33 kHz (High Performance)

1010

6.66 kHz (High Performance)

AN4650 Datasheet(PDF) 17 Page - STMicroelectronics

AN4650 Datasheet(HTML) 17 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL