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FXLS93421 Datasheet(PDF) 116 Page - NXP Semiconductors

Part # FXLS93421
Description  Dual channel inertial sensor
PDF  254 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

FXLS93421 Datasheet(HTML) 116 Page - NXP Semiconductors

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NXP Semiconductors
FXLS9xxxx
Dual channel inertial sensor
aaa-030615
PS15 Internal self-test
Complete Internal Fixed
Capacitor self-test
Suspend the Offset
Cancellation Filter
ST Disabled
Sample DSP Output
Captured 16 Sensor
Readings?
Enable Positive self-test
Delay 8.192 ms
Sample DSP Output
Calculate ST+ =
STPOSAVG - OffsetAVG
Disable self-test
Delay 8.192 ms
Disable self-test
Delay 8.192 ms
Enable Digital self-test
Delay 19.5 ms
Sample DSP Output
Increment ST_RPT
Sample DSP Output
Reset Offset Cancellation
Delay 106 ms
Disable self-test
Delay 512 µs
no
yes
no
yes
no
Delay 512 µs
Set REPEAT_ST
Captured 16 Sensor
Readings?
no
Delay 512 µs
Captured 16 Sensor
Readings?
REPEAT_ST
Set?
no
yes
yes
no
no
yes
Delay 512 µs
Captured 16
Sensor Readings?
DST
within Specification
Limits?
ST_RPT at max?
no
no
Exit
yes
Enable Negative self-test
Delay 8.192 ms
no
Delay 512 µs
Captured 16 Sensor
Readings?
yes
Self-test failed.
SET ST_ERROR
Self-test failed.
SET ST_ERROR
yes
Sample DSP Output
Sample DSP Output
ST+ within
Specification Limits?
no
no
Increment ST_RPT
yes
ST_RPT at max?
Exit
yes
OC - within
Programmed Limits?
Self-test passed.
Clear ST_ERROR
Exit
yes
ST_RPT at max?
Self-test failed.
SET ST_ERROR
Exit
Fixed Cap Test Pass?
Self-test failed.
SET ST_ERROR
Exit
Delay tPSI5ST_START
no
yes
Set REPEAT_ST
yes
ST- within
Specification Limits?
no
yes
Increment ST_RPT
Calculate ST- =
STNEGAVG - OffsetAVG
Figure 20. PSI5 self-test procedure
If the ST_ERROR flag in the CHx_STAT register is set once this test is complete, the
device will exit PSI5 initialization phase 2 with a self-test error and the self-test error
message are transmitted instead of sensor data. In this case, the ST_ER-ROR bit can
only be cleared by a device reset.
FXLS9xxxx
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2021. All rights reserved.
Product data sheet
Rev. 6 — 8 February 2021
116 / 254



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