Datasheet
MMA8652FC
Sensors
Freescale Semiconductor, Inc. 53
DR[2:0] bits select the Output Data Rate (ODR) for acceleration samples in WAKE mode. The default value is 000 for a data rate
of 800 Hz.
The ACTIVE bit selects between STANDBY mode and ACTIVE mode.
• The F_Read bit selects between normal and Fast Read mode.
When selected, the auto-increment counter will skip over the LSB data bytes.
Data read from the FIFO will skip over the LSB data, reducing the acquisition time.
• Note that F_READ can only be changed when FMODE = 00.
• The F_READ bit applies for both the output registers and the FIFO.
Table 95. SLEEP mode rates
ASLP_RATE1 ASLP_RATE0 Frequency (Hz) Notes
00 50
When the device is in Auto-SLEEP mode, the system ODR and the
data rate for all the system functional blocks are overridden by the data
rate set by the ASLP_RATE field.
0 1 12.5
1 0 6.25
1 1 1.56
Table 96. System output data-rate selection
DR2 DR1 DR0
ODR
(Hz)
Period
(ms)
Notes
0 0 0 800 1.25 default
0 0 1 400 2.5
0 1 0 200 5
0 1 1 100 10
1 0 0 50 20
1 0 1 12.5 80
1 1 0 6.25 160
1 1 1 1.56 640
Table 97. Full-Scale selection using ACTIVE bit
Active bit Mode
0 STANDBY (default)
1ACTIVE