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L9678PTR Datenblatt(PDF) 25 Page - STMicroelectronics

Teilenummer L9678PTR
Bauteilbeschribung  Automotive user configurable airbag and battery cut-off IC
PDF  215 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9678PTR Datenblatt(HTML) 25 Page - STMicroelectronics

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DS11626 Rev 9
25/216
L9678P, L9678P-S
Start-up power control
214
4.2.5
Power-up and power-down sequence
The behavior of the IC during normal power-up and power-down is shown from Figure 5 to
Figure 8. The following sequences represent just a subset of all possible power-up and
power-down scenarios.
In Figure 5 a normal IC power-up controlled by the state of the WAKEUP pin is shown.
Figure 5. Normal power-up sequence - WAKEUP controlled
Watchdog
X
X
X
-
-
-
-
Diagnostics
X
X
X
-
-
-
-
DC sensor interface
X
X
X
-
-
-
-
GPO drivers
X
X
X
-
-
-
-
Safing logic
X
X
X
-
-
-
-
ISO9141
X
X
X
-
-
-
-
Table 4. Functions disabling by state (continued)
Function
Power
Off
Wake-up
monitor
Awake Start-up
Run
Power
mode
shutdown
ER
VIN current
VBAT
(VBATmon)
WAKEUP
VINT, CVDD
POR
ERBOOST
WU_mon
WU_on
VDD5
VDD3V3
VDD3V3_U
V
RESET
RESET
Hold Time
SPI ER
charge on
VER
VBGOOD
GAPGPS02863



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