FXLS8471Q Datasheet, PDF (40/75 Pages) Freescale Semiconductor, Inc – Linear Accelerometer

If any of the interrupt sources listed under the “Wake-from-Sleep” column is asserted, then the system will transition out of the
low sample rate Auto-Sleep mode to the user-specified fast sample rate provided the user-specified wake event function is
enabled in register CTRL_REG3.
If the Auto-Sleep interrupt is enabled, a transition from Active mode to Sleep mode and vice-versa will generate an interrupt.
If CTRL_REG3[fifo_gate] = 1, transitioning to Auto-Sleep mode will preserve the FIFO contents, set SYSMOD[fgerr] (FIFO Gate
error), and stop new acquisitions. The system will wait for the FIFO buffer to be emptied by the host application before new
samples can be acquired.
Acquire
Standby
No Sleep
SLP_COUNTER <
ASLP COUNT
SLP_COUNTER >
ASLP COUNT
Standby
Sleep
Active Mode
Auto-Sleep Mode
Figure 12. Auto-Sleep state transition diagram
FXLS8471Q
40
Sensors
Freescale Semiconductor, Inc.