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L9679P 数据表(PDF) 33 Page - STMicroelectronics

部件名 L9679P
功能描述  Automotive advanced airbag IC for mid/high end applications
PDF  272 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

L9679P 数据表(HTML) 33 Page - STMicroelectronics

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L9679P
Start-up and power control
271
6.2.5
Power-up and power-down sequences
The behaviour of the IC during normal power-up and power-down is shown in Figure 6 to
Figure 9. The following sequences represent just a subset of all possible power-up and
power-down scenarios. In Figure 6 a normal IC power-up controlled by the state of the
WAKEUP pin is shown.
Figure 6. Normal power-up sequence
VBBAD
VBGOOD
VBAT _MON
WAKE UP
RESET_Hold_Time
<1ms
WU_on
VINT
POR
ERBSTSW
and
SYNCBSTSW
ERBOOST
VER
VCC
RESET
<50μA
VIN current
WU_mon
>1ms
VIN-Vdiode
0V
SYNCBOOST_OK
VIN-Vdiode
SYNCBOOST
SAT BCKSW
SATBUCK_OK
SATBUCK
VCCBCKSW
VCC_UV
<50μA
WU_off
VINT_UV
0V
0V
0V
0V
0V
SPI_SYS_CTL(ER_CUR_EN)=01
VIN
VINBAD
VINGOOD
SPI
command
GAPGPS02252



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