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L9679P Datasheet(PDF) 194 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) 194 Page - STMicroelectronics

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Safing logic
L9679P
194/279
DS11627 Rev 7
Figure 52. Safing engine - Validate data flow chart
i=1
C
i = Safing Record index:
1: SR1
2: SR2
3: SR3
4: SR4
Outputs to COMBINE
function:
CC[i]
valdat[i]
valCC[i]
VALDAT
LIMEN[i]=1?
LIMSEL[i]=1?
Abs
(dataresult[i])
< 120d?
Abs
(dataresult[i])
< 480d?
Y
Y
N
N
N
valdat[i] = 0
valCC[i]=0
valdat[i] = 1
valCC[i]=1
valdat[i] = 0
valCC[i]=0
valdat[i] = 1
valCC[i]=1
valdat[i] = 1
valCC[i]=1
i=10 &
L9679?
D
Y
N
Y
N
N=5 (L9678)
N=17 (L9679)
N=17 (L9680)
N
Y
Match[i]=1 &
COMB[i]=0
CC[i]=1?
Y
i<Z &
COMB[i]=1
N
Y
Mod(i,2)
Checks for combinable
records.
Z=5, L9678
Z=9, L9679
Z=13, L9680
Checks for odd indices
Y
N
Y
N
Match[i]=1 &
MatchCC[i+1]=1
Match[i]=1 &
MatchCC[i-1]=1
CC[i]=1
N
N
Y
Y
i = N?
Y
N
i = i+1
i = 14
GAPGPS02293



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