FXLS93421 datasheet(11/254 Pages) NXP

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NXP Semiconductors

FXLS9xxxx

Dual channel inertial sensor

9.2 Pin description: SPI or I2C mode

Pin Name

Definition

Description

VCC

Supply

NXP recommends that this pin be connected to VCC. Optionally, this pin can

be unterminated.

PCM1 / ARM1 Channel 1

PCM

Channel 1 Arm

This pin has multiplexed functions:

• When the channel 1 arming output is selected, the pin can be configured

as an open-drain, active low output with a pull-up current; or an open-drain,

active high output with a pull-down current.

• When PCM mode is selected, this pin can be configured as a digital output

with PCM signal proportional to the channel 1 sensor data.

If unused, or in I2C mode, NXP recommends that this pin be unterminated.

3, 4, 5, 6

TEST

Test Pin

NXP recommends that these pins be unterminated. Optionally, this pin can be

tied to VSS.

7, 14

VSS

Supply Return This pin is the supply return node.

SS_B

Slave select

In SPI mode, this input pin provides the slave select for the SPI port. An

internal pull-up device is connected to this pin.

In I2C mode, this pin must be connected to VBUF with an external pull-up

resistor as shown in Figure 6.

SCLK/SCL

SPI Clock

In SPI mode, this input pin provides the serial clock. An internal pull-down

device is connected to this pin.

In I2C mode, this input pin provides the serial clock. This pin must be

connected to VBUF with an external pull-up resistor as shown in Figure 6.

MOSI

SPI Data In

In SPI mode, this pin functions as the serial data input to the SPI port. An

internal pull-down device is connected to this pin.

In I2C mode, NXP recommends that this pin be unterminated. Optionally, this

pin can be connected to VSS.

MISO/SDA

SPI Data Out

In SPI mode, this pin functions as the serial data output.

In I2C mode, this pin functions as the serial data input/output. This pin must be

connected to VBUF with an external pull-up resistor as shown in Figure 6.

PCM0 / ARM0 Channel 0

PCM

Channel 0 Arm

This pin has multiplexed functions:

• When the channel 0 arming output is selected, the pin can be configured

as an open-drain, active low output with a pull-up current; or an open-drain,

active high output with a pull-down current.

• When PCM mode is selected, this pin can be configured as a digital output

with PCM signal proportional to the channel 0 sensor data.

If unused, or in I2C mode, NXP recommends that this pin be unterminated.

13, 15, 16 VCC

Supply

This pin is connected to the supply for the device. An external capacitor must

be connected between this pin and VSS as shown in Figure 5 and Figure 6.

PAD

Die Attach Pad This pin is the die attach flag, and must be connected to VSS. See Section 16

for die attach pad connection details.

Table 9. Device pinout: SPI or I2C mode

FXLS9xxxx

All information provided in this document is subject to legal disclaimers.

Product data sheet

Rev. 6 — 8 February 2021

11 / 254

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