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L9680 Datasheet(PDF) 201 Page - STMicroelectronics

Part # L9680
Description  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  286 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9680 Datasheet(HTML) 201 Page - STMicroelectronics

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DS11615 Rev 7
201/286
L9680
Safing logic
285
Figure 53. Safing engine – 16-bit Message decoding flow chart
CC[i] = 0?
CS[i] =
cs_active?
IF[i] = 1?
N
Y
Y
N
Y
match[i]=1
match[i]=0
i++
Y
N
N
Outputs to VALDAT function :
dataresult[i]
match[i]
B
C
EN_SAF(i)
= 1?
Y
N
MSGDEC16
RESPTARG[i]=
MISO &
RESPMASK[i]
req_ok[i]
= 1?
N
Y
dataresult[i] =
MISO &
DATAMASK [i]
REQTARG[i]=
MOSI &
REQMASK[i]?
Y
N
req_ok[i]=1
req_ok[i]=0
REQTARG[i]=
MOSI &
REQMASK[i]?
Y
N
i = Safing Record index:
1: SR1
2: SR2
3: SR3
4: SR4
N=5 (L9678)
N=17 (L9679, L9680)
i = N?
match[i]=0
Y
N
RESPTARG[i]=
MISO &
RESPMASK[i]
dataresult[i] =
MISO &
DATAMASK [i]
Match[i]=1
match[i]=0
req_ok[i]=0
N
Y
i=10?
i=14
Y
L9679 skips 16-bit
records 10-13
N
GAPG0911151501PS



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