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L9924L датащи(PDF) 50 Page - STMicroelectronics

номер детали L9924L
подробное описание детали  Automotive vehicle conform truck car alternator regulator IC with LIN
PDF  84 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9924L датащи(HTML) 50 Page - STMicroelectronics

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Watchdog
L9924L
50/84
DocID028840 Rev 3
The following picture illustrates a typical watchdog refresh sequence.
Figure 23. Typical watchdog refresh sequence
6.1
Power stage watchdog handling
When a watchdog error occurs, the power stage is in the following conditions:
Excitation off
DFM off (the relevant SPI bits are cleared)
LIN TX off (the relevant SPI bit is cleared)
Lamp drivers:
–
on/off or off/on. The relevant outputs are conditioned by the relevant activation bits
in SPI register (L_HS_EN and L_LS_EN) that cannot be on at the same time and
with a default value of 1 for LS and 0 for HS. The effective lamp status is
conditioned by L_KEY status.
High current lamp drivers:
–
on/off or off/on. The relevant outputs are conditioned by the relevant activation bits
in SPI register (LHC_HS_EN and LHC_LS_EN) that cannot be on at the same
time and with a default value of 1 for LS and 0 for HS. The effective lamp status is
conditioned by LHC_KEY status.



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