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L9678P 데이터시트(PDF) 121 Page - STMicroelectronics

부품명 L9678P
상세설명  Automotive user configurable airbag IC
PDF  203 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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L9678P 데이터시트(HTML) 121 Page - STMicroelectronics

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L9678P, L9678P-S
Deployment drivers
202
Figure 27. Deployment timer diagnostic sequence
Loop diagnostics control and results registers
Diagnostic tests and channels for each test are controlled through the Loop Diagnostic
Request Register (LPDIAGREQ), diagnostic results are stored in the Loop Diagnostic
Status Register (LPDIAGSTAT).
6.5.2
High level diagnostic approach
In this approach, the test steps described in the sections below are coded into a dedicated
state machine that helps reducing the user intervention to a minimum.
The high-level diagnostic commands are contained in the LPDIAGREQ, LOOP_DIAG_SEL,
and LOOP_DIAG_CHSEL registers. These settings are described in the SPI Table for these
commands in Read/write register.
The high-level diagnostic response is available in the LPDIAGSTAT register. These are
described in the SPI Table for this command in Read/write register.
The concept is depicted in the following figures.



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