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L9679P Datenblatt(PDF) 203 Page - STMicroelectronics

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

L9679P Datenblatt(HTML) 203 Page - STMicroelectronics

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DS11627 Rev 7
203/279
L9679P
Safing logic
278
Figure 59. Safing engine diagnostic logic
A configurable mask for each internal ARMxINT signal is available for all of the integrated
deployment loops. The un-masked ARMxINT signal for each loop will enable the respective
loop drivers.
Activation of VSF (regulation rail for High Side Safing FET) occurs upon ARMxINT. Actual
High Side Safing FET activation still requires microcontroller signal.
L9679P is able to provide arming signals to external deployment loops by means of four
discrete output ARMx pins.
SPI Decode /
Threshold
Compare
SCLK_RS
MOSI_RS
MISO_RS
CS_RS
SAF_CS0
SAF_CS1
SAF_CS2
SAF_CS3
Pulse
Stretch
DS_TEST(VSF)
DIAG STATE
DSTEST(ARM1)
ARM1REQ
DSTEST(ARM2)
ARM2REQ
DSTEST(ARM3)
ARM3REQ
DSTEST(ARM4)
ARM4REQ
ARMING STATE
DSTEST(PULSE)
PULSE_TEST1
PULSE_TEST12
GAPGPS02298



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