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ADXL345 Datasheet(Arkusz danych) 8 Page - Analog Devices

Numer części ADXL345
Szczegółowy opis  Three-Axis, ±2/4/8/16g Digital Accelerometer
Pobierz  24 Pages
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Producent  AD [Analog Devices]
Strona internetowa  http://www.analog.com
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ADXL345
Preliminary Technical Data
Rev. PrA | Page 8 of 24
Auto Sleep Mode
Additional power can be saved by having the ADXL345
automatically switch to sleep mode during periods of inactivity.
To enable this feature set the THRESH_INACT register to an
acceleration value that signifies no activity (this value will
depend on the application), set TIME_INACT to an
appropriate inactivity time period (again, this will depend on
the application), and set the AUTO_SLEEP bit and the LINK bit
in the POWER_CTL register. Current consumption at the sub-
8Hz data rates used in this mode is typically 25 µA.
Standby Mode
For even lower power operation Standby Mode can be used. In
Standby Mode current consumption is reduced to 2µA (typical).
In this mode no measurements are made and communication
with the ADXL345 is limited to single-byte read or writes.
Standby Mode is entered by clearing the MEASURE bit (D3) in
the POWER_CTL register. Placing the device into Standby
Mode will preserve the contents of the FIFO.




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