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FXLS93421 Datasheet(PDF) 107 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) 107 Page - NXP Semiconductors

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NXP Semiconductors
FXLS9xxxx
Dual channel inertial sensor
of these capacitors. A monitor circuit is incorporated to ensure predict-able operation if
the connection to the external VBUF capacitor becomes open. If the external capacitor is
not present, the regulator voltage will fall below the threshold specified in Section 10.4
causing the VBUF_ERR bit to be set in the DEVSTAT1 register.
The VBUF capacitor is tested synchronous to the protocol transmissions as shown in the
diagrams in Figure 12, Figure 13, and Figure 14.
11.4.1.1 VBUF capacitance monitor timing, DSI3
aaa-030606
tD_CAPTEST
tD_CAPTEST
tCAPTST_TIME
tCAPTST_TIME
capacitor present
capacitor open
time
BUS_I
Cap_Test
VBUF
VBUF_UV_f
VBUF_ERR
Figure 12. VBUF capacitor monitor timing, DSI3
11.4.1.2 VBUF capacitance monitor timing, PSI5
aaa-030607
tP_CAPTEST
tP_CAPTEST
tCAPTST_TIME
tCAPTST_TIME
capacitor present
capacitor open
time
BUS_I
Cap_Test
VBUF
VBUF_UV_f
VBUF_ERR
Figure 13. VBUF capacitor monitor timing, PSI5 synchronous mode
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
107 / 254



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