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L9679E 데이터시트(PDF) 80 Page - STMicroelectronics

부품명 L9679E
상세설명  Automotive battery cut-off circuit and airbag system expansion IC
PDF  127 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679E 데이터시트(HTML) 80 Page - STMicroelectronics

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Figure 19. High-level loop diagnostic flow 2
Low level diagnostic is selected (bit 15
of LPDIAGREQ is low) OR an invalid
high level diagnostic is selected OR we
are in DEP_ENABLED state
End of setting time
End of setting time
End of conversion
Store result in ADCRESC
End of conversion
Store result in ADCRESD
Off time elapsed AND new
diagnostic request is
SQUIB/PYROSWITCH
RESISTANCE RANGE test
Resistance test
setting time = 304µs/1200µs
TIP = 0
Resistance range test time elapsed
Latch HSR_HI, HSR_LO flags
TIP = 1
TIP = 1
Enable ISINK
Enable ISRC
BYPASS ISRC on SRx
TIP = 1
Enable VRCM
Enable ISINK
Enable ISRC on SFx
Enable ISINK
TIP = 1
Off time elapsed AND new
diagnostic request is
SQUIB/PYROSWITCH
RESISTANCE measure test
Off time = 24µs
New high level diagnostic request
(bit 15 of LPDIAGREQ is high)
Wait enough time to
be sure that all
currents and voltages
supplies start in OFF state
Resistance range test
setting time = 152µs/600µs
SQUIB/PYROSWITCH
RES RANGE TEST
DIAG_OFF
WAIT_OFF
Resistance test
setting time = 304µs/1200µs
RES MEAS SETTLE2
RES MEAS CONV12
GADG0903181457PS
SQUIB/PYROSWITCH
RES MEAS CONV1
SQUIB/PYROSWITCH
SQUIB/PYROSWITCH
RES MEAS SETTLE2
SQUIB/PYROSWITCH
L9679E
Deployment drivers
DS12485 - Rev 8
page 80/127



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