FXLS8964AF datasheet(61/98 Pages) NXP

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NXP Semiconductors

FXLS8964AF

3-Axis Low-g Accelerometer

FXLS8964AF

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Objective data sheet

Rev. 2 — 30 October 2020

61 / 98

WAKE mode ODR (Hz)

WAKE mode

ODR Period (ms)

ASLP_COUNT Period (ms)

Max Inactivity Time (s)

163.84

12.5

327.68

6.25

160

655.36

3.125

320

1310.72

1.563

640

2621.44

0.781

1280

5242.54

Table 69. Auto-WAKE/SLEEP Interrupt Event Sources

Interrupt Event

Source

Event flag can clear auto-sleep timer?

Event flag can transition the device from

SLEEP to WAKE mode?

SRC_DRDY

SRC_OVF

SRC_BUF

Yes[1]

SRC_SDCD_OT

Yes

SRC_SDCD_WT

Yes

SRC_ORIENT

Yes

SRC_ASLP

No[2]

SRC_BOOT

[1]

When BUF_CONFIG2[WAKE_SRC_BUF] = 1, clearing the SRC_BUF event flag will reset the auto-sleep timer and prevent FXLS8964AF from entering

SLEEP mode. When BUF_CONFIG2[WAKE_SRC_BUF] = 0 (default), FXLS8964AF will enter SLEEP mode regardless of the state of the BUF_WMRK or

BUF_OVF event flags.

[2]

If the BUF_GATE bit is set to logic '1', it will prevent the output buffer from accepting new data after a WAKE-to-SLEEP or SLEEP-to-WAKE operating

mode transition until the host first empties the buffer contents. The BUF_GATE bit is useful for preventing acceleration data from different WAKE and

SLEEP mode ODRs from being mixed within the buffer.

13.21 INT_EN register (address 20h)

This register is used to enable and disable the various interrupt event generators

embedded within the device.

Note:

• When BT_MODE = VDD, the INT1/MOT_DET pin signals any mapped (and enabled)

interrupt(s) with a TPULSE-MOT ms active low pulse (open-drain output with external pull-

up).

• Any enabled interrupt will be signaled with a TPULSE-MOT ms pulse at the ODR rate until

the respective interrupt source flag is cleared.

• The INT2/BOOT_OUT pin only signals the boot process complete interrupt, signaled

by a TPULSE-BOOT2 ms active low pulse (open-drain with external pull-up). Any other

interrupt sources mapped to the INT2/BOOT_OUT pin are ignored.

FXLS8964AF Datasheet(PDF) 61 Page - NXP Semiconductors

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