FXLS93421 datasheet(171/254 Pages) NXP

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NXP Semiconductors

FXLS9xxxx

Dual channel inertial sensor

Condition

exception

PDCM

enabled?

Description

Device response

VBUF Error

N/A

VBUF < VBUF_UV_F

• Response Current Deactivated

• VBUFUV_ERR set, PDCM Status set as specified in

Section 12.4.2.2

• The device ignores commands in CRM

Internal Regulator

Error

N/A

Internal regulator under-

voltage condition

• The device is held in Reset

• No response to DSI commands

• If activated, BUSSW_L is deactivated

• The device must be reinitialized when the internal

regulator returns above the threshold

OTP Error

Detection Fault

(Factory Array)

N/A

Error detected in factory

programmed OTP array.

• Periodic Data Collection Mode response data set to

error response

• F_OTP_ERR set, PDCM Status set as specified in

Section 12.4.2.2

OTP Error

Detection Fault

(User Array)

N/A

Error detected in User

programmed OTP array and

the LOCK_U bit is set.

• Periodic Data Collection Mode response data set to

error response

• U_OTP_ERR set, PDCM Status set as specified in

Section 12.4.2.2

N/A

User R/W Array

Error Detection

Fault

Yes

Error detected in user read

write registers and the

ENDINIT bit is set.

• Periodic Data Collection Mode response data set to

error response

• U_RW_ERR set, PDCM Status set as specified in

Section 12.4.2.2

ST activated during

initialization

• Internal self-test circuitry enabled

• Self-test Activation Incomplete status cleared

• Sensor Data Registers (SNSDATAx_x) contain self-test

active data

• ST_ACTIVE set

Self-test

Activated

Yes

ST activated in Periodic Data

Collection Mode

• Periodic Data Collection Mode sensor response data

normal

• Self-test Activation ignored

In initialization, before Self-

test

• Normal Responses to Command and Response Mode

Self-test Never

Activated after

Reset

Yes

In PDCM, Self-test

incomplete

• Periodic Data Collection Mode sensor response data

normal

• ST_INCMPLT set, PDCM Status set as specified in

Section 12.4.2.2

Table 257. Exception conditions and response...continued

12.7.1 Daisy chain and discovery mode error handling

Table 258 shows the effect of internal failure modes on the discovery and daisy chain

initialization procedures.

FXLS9xxxx

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

Product data sheet

Rev. 6 — 8 February 2021

171 / 254

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