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L9908 bảng dữ liệu(PDF) 19 Page - STMicroelectronics

tên linh kiện L9908
Giải thích chi tiết về linh kiện  Automotive 3-Phase motor gate driver unit
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L9908 bảng dữ liệu(HTML) 19 Page - STMicroelectronics

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4.2
Safe state activation
Depending on the safe state its activation is performed through one between two separate paths.
Figure 6. Safe states activation paths
Logic activation path: safe state activation is carried out entirely by the main logic.
This path is used to develop:
•
SAFE HIZ (except if determined by CLK1_TIME_OUT)
•
SAFE DIS
•
SAFE OFF
Damage protected activation path: in case of device failure where internal main logic integrity is compromised
L9908 implements an isolated Safe Switch Off structure which allows to activate an isolated Safe Switch Off
structure which can be activated through a separated path.
This path is used to develop:
•
SAFE OFF (only if determined by NDIS = 0)
•
CLK1_TIME_OUT
The Safe State activation through the damage protected path is signaled by setting the dedicated SPI read only
bit SAFE_STATE (GEN_STATUS1[2]).
L9908
Functional safety
DS13546 - Rev 5
page 19/152



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