LSM6DB0 Datasheet, PDF (23/66 Pages) STMicroelectronics – 3D accelerometer, 3D gyroscope and signal processor

LSM6DB0
Device operating modes
6.3
Table 11. Accelerometer turn-on time
ODR [Hz]
BW = 400 Hz⁽¹⁾ BW = 200 Hz⁽¹⁾ BW = 100 Hz⁽¹⁾
BW = 50 Hz⁽¹⁾
14.9
0
0
0
0
59.5
0
0
0
0
119
1
1
1
2
238
1
1
2
4
476
1
2
4
7
952
2
4
7
14
1. The table contains the number of samples to be discarded after switching between power-down mode
and normal mode.
Microprocessor operating modes
Several microprocessor operating modes are defined for the LSM6DB0:
 Reset mode
 Two low-power modes: low-power wait-for-interrupt (WFI) mode and high-power wait-
for-interrupt (WFI) mode
 Active mode
In reset mode the LSM6DB0 is in ultra-low-power consumption: no voltage regulators, nor
clocks are powered. The LSM6DB0 enters reset mode by asserting the external reset
signal.
While in low-power WFI mode, the LSM6DB0 CPU is stopped and the high-frequency
80 MHz RC oscillator is powered down. All peripherals, apart from one timer, are disabled.
The power consumption is about 800 μA with a 1 kHz clock.
In high-power WFI mode, the CPU is stopped and the high-frequency 80 MHz RC oscillator
is powered up. This mode allows a faster response time for an interrupt to wake up the
CPU. All peripherals are enabled and can wake up the CPU with an interrupt. The power
consumption in this mode is around 2 mA with an 80 MHz clock.
In active mode the LSM6DB0 is fully operational: all interfaces, including SPI, I²C, JTAG
and UART, are active as well as all internal power supplies together with the high-speed
frequency oscillator. The MCU core is also running.
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