LSM6DB0 Datasheet, PDF (31/66 Pages) STMicroelectronics – 3D accelerometer, 3D gyroscope and signal processor

LSM6DB0
Microprocessor functionality
8.3
Reset management
The device has an integrated brownout reset (BOR) circuit and an integrated power-on
reset (POR).
In the LSM6DB0, the BOR threshold is 1.5 V. When V_DD is below this threshold, the device
is in reset. The BOR is always active in the LSM6DB0 at power-on.
The POR circuit is activated when the LDO has stabilized. The startup time of the LSM6DB0
at power-on is typically 1 ms with the BOR active.
8.4
Boot mode
At startup, the LSM6DB0 boots from a reserved section of the Flash memory programmed
by ST during production. It is used to adjust accurately the oscillator frequencies and
contains manufacturing information. Any interference with this initialization sequence can
degrade the performance of the device. At the end of this sequence, the system boots from
the main Flash which contains the user’s program.
8.5
Clock management
Figure 15. Clock tree
1. Same clock supply for both I²C
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