FXLS8964AF datasheet(30/98 Pages) NXP

30 / 98 page

NXP Semiconductors

FXLS8964AF

3-Axis Low-g Accelerometer

FXLS8964AF

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Objective data sheet

Rev. 2 — 30 October 2020

30 / 98

Callout

Current

mode

Next mode

Transition criteria

EXT_TRIG

WAKE

BT_MODE = GND:

Signal a low to high state transition on the INT2/EXT_TRIG pin to initiate an

ADC conversion

BT_MODE = VDD:

The EXT_TRIG function is not available when BT_MODE = VDD; this

transition is not possible

WAKE

EXT_TRIG

BT_MODE = GND:

FXLS8964AF automatically return to the EXT_TRIG state once the

previously triggered measurement has completed.

BT_MODE = VDD:

The EXT_TRIG function is not available when BT_MODE = VDD; this

transition is not possible

Standby

WAKE

BT_MODE = GND:

Set

SENS_CONFIG1[ACTIVE] = 1

BT_MODE = VDD:

The

SENS_CONFIG1[ACTIVE] bit is set automatically after the BOOT

process completes when the INT1/MOT_DET pin is held high.

The host may also manually set this bit using the I2C or SPI interfaces to

resume motion detection mode after changing the device configuration (after

entering Standby mode from WAKE mode via register command)

WAKE

Standby

BT_MODE = GND:

Set

SENS_CONFIG1[ACTIVE] = 0

BT_MODE = VDD:

The

SENS_CONFIG1[ACTIVE] bit is cleared automatically when the

INT1/MOT_DET pin is brought low for ≥ TMOT_HIB ms; The host may also

manually clear this bit using the I2C or SPI interfaces in order to change the

default device configuration.

WAKE

SLEEP

When

ASLP_CNT ≥ 1, the device transitions to the SLEEP mode when

none of the configured AWS interrupt source(s) clear the Auto-Wake/Sleep

timer before it expires (host programmed

ASLP_CNT value is reached),

allowing the device to conserve energy by automatically using a lower ODR

and/or power (performance) mode.

SLEEP

WAKE

One or more of the configured AWS event sources triggers the exit from

SLEEP mode and entry into WAKE.

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