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AMSR[2:0]
000
001
010
011
100
101
110
111
NAME
AMPD
AM64
AM32
AM16
AM8
AM4
AM2
AM1
DESCRIPTION
Tap Detection Mode and 120 Samples/Second Active and Auto-Sleep Mode
Tap Detection Sampling Rate : The device takes readings continually at a rate of nominally 3846 g-cell
measurements a second. It then filters these high speed measurements by maintaining continuous rolling averages of
the current and last g-cell measurements. The averages are updated every 260 μs to track fast moving accelerations.
Tap detection: itself compares the two filtered axis responses (fast and slow) described above for each axis. The
absolute (unsigned) difference between the fast and slow axis responses is compared against the tap detection delta
threshold value PDTH[4:0] in the PDET (0x09) register.
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 8.36 ms in Active
Mode and Auto-Sleep. The update rate is 120 samples per second. These measurements update the XOUT (0x00),
YOUT (0x01), and ZOUT (0x02) registers also.
64 Samples/Second Active and Auto-Sleep Mode
For portrait/landscape detection : The device takes and averages 32 g-cell measurements every
15.625 ms in Active Mode and Auto-Sleep. The update rate is 64 samples per second. These measurements update
the XOUT (0x00), YOUT (0x01), and ZOUT (0x02) registers also.
32 Samples/Second Active and Auto-Sleep Mode
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 31.25 ms in Active
Mode and Auto-Sleep. The update rate is 32 samples per second. These measurements update XOUT (0x00), YOUT
(0x01), and ZOUT (0x02) registers also.
16 Samples/Second Active and Auto-Sleep Mode
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 62.5 ms in Active
Mode and Auto-Sleep. The update rate is 16 samples per second. These measurements update the XOUT (0x00),
YOUT (0x01), and ZOUT (0x02) registers also.
8 Samples/Second Active and Auto-Sleep Mode
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 125 ms in Active
Mode and Auto-Sleep. The update rate is 8 samples per second. These measurements update the XOUT (0x00),
YOUT (0x01), and ZOUT (0x02) registers also.
4 Samples/Second Active and Auto-Sleep Mode
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 250 ms in Active
Mode and Auto-Sleep. The update rate is 4 samples per second. These measurements update the XOUT (0x00),
YOUT (0x01), and ZOUT (0x02) registers also.
2 Samples/Second Active and Auto-Sleep Mode
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 500 ms in Active
Mode and Auto-Sleep. The update rate is 2 samples per second. These measurements update the XOUT (0x00),
YOUT (0x01), and ZOUT (0x02) registers also.
1 Sample/Second Active and Auto-Sleep Mode
For portrait/landscape detection: The device takes and averages 32 g-cell measurements every 1000 ms in Active
Mode and Auto-Sleep. The update rate is 1 sample per second. These measurements update the XOUT (0x00), YOUT
(0x01), and ZOUT (0x02) registers also.
MMA7660FC
Sensors
19
Freescale Semiconductor, Inc.
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