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L9679P Datasheet(PDF) 196 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) 196 Page - STMicroelectronics

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Safing logic
L9679P
196/279
DS11627 Rev 7
Figure 54. Safing engine threshold comparison
N
COMPARE
N
N
Y
Y
N
Y
ARMP_TH
POS_COUNT[i] =
ARMP_TH?
POS_COUNT[i]>
N
Y
=1?
Valdat[i]
Y
+ ADD_VAL
POS_COUNT[i]
POS_COUNT[i]=
SAF_THRESH[i]
i=1
E
i = 14
i = i+1
N
Y
i = N?
N
Y
L9679?
i=10 &
Y
F
valdat[i] = 0
Match[i] = 0
N=17 (L9680)
N=17 (L9679)
N=5 (L9678)
Y
POS_COUNT[i]=0
- SUB_VAL
POS_COUNT[i]
POS_COUNT[i]=
< 0?
POS_COUNT[i]
Y
ARMN_TH
NEG_COUNT[i] =
ARMN_TH?
NEG_COUNT[i]>
Y
+ ADD_VAL
NEG_COUNT[i]
NEG_COUNT[i]=
SAF_THRESH[i]
N
Y
NEG_COUNT[i]=0
- SUB_VAL
NEG_COUNT[i]
NEG_COUNT[i]=
< 0?
NEG_COUNT[i]
N
< 0?
POS_COUNT[i]
NEG_COUNT[i]=0
N
< 0?
NEG_COUNT[i]
Y
- SUB_VAL
NEG_COUNT[i]
NEG_COUNT[i]=
- SUB_VAL
POS_COUNT[i]
POS_COUNT[i]=
POS_COUNT[i]=0
= 1?
NO_DATA
POS_COUNT[i]=0
NEG_COUNT[i]=0
N
GAPGPS02295



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