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L9679P Datasheet(PDF) 170 Page - STMicroelectronics

Part # L9679P
Description  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  279 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 170 Page - STMicroelectronics

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Deployment drivers
L9679P
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DS11627 Rev 7
Figure 37. High level loop diagnostic flow 2
GAPGPS01644
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 ADCRESA
End of conversion
Store result in ADCRESB
Off time elapsed AND new
diagnostic request is SQUIB
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 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 RES RANGE
TEST
DIAG_OFF
WAIT_OFF
SQUIB RES MEAS
SETTLE1
Resistance test
setting time = 304μs/1200μs
SQUIB RES MEAS
SETTLE2
SQUIB RES MEAS
CONV1
SQUIB RES MEAS
CONV12



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