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L9965P 데이터시트(PDF) 11 Page - STMicroelectronics

부품명 L9965P
상세설명  Automotive single channel pyro-fuse driver
PDF  104 Pages
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제조업체  STMICROELECTRONICS [STMicroelectronics]
홈페이지  http://www.st.com
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L9965P 데이터시트(HTML) 11 Page - STMicroelectronics

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Table 6. Device FSM
State
Purpose
Reached
from
Condition
Active resources
OFF
Device OFF
Any state
When the ERBST voltage falls below the
VPOR_TH threshold
None
DEEP-
SLEEP
Ultralow power
state for managing
long inactivity
periods or
implementing low-
power strategies
NORMAL
When CWUP is low, fault timeout
(tFAULT_HANDLING_TIMEOUT) is expired,
the SPI communication timeout
(tSPI_COMM_TIMEOUT) is expired and
ERBST is not working (ER CAP
charged)
OR
SPI SLEEP frames
Wake-up from cyclic wake-up pin
(CWUP)
Wake-up via peripheral SPI
Wake-up from fire enable inputs
(FENH/FENL)
OFF
When ERBST voltage rises above the
VPOR_TH threshold
Wake-up from cyclic wake-up pin
(CWUP)
Wake-up via peripheral SPI
DIAG
Diagnostic state
DEEP-
SLEEP
When CWUP is asserted
All resources are active in
NORMALAdditionally, all the
resources needed to perform the
diagnostic routine
NORMAL
When commanded via SPI
NORMAL
Normal operating
state
DEEP-
SLEEP
Wake-up from any of the enabled
sources (FENH or FENL or SPI valid
pattern)
All resources are active, except the
ones needed to perform the
diagnostic routine
ARM
All the enabled deploy conditions (FENH
and FENL) are deasserted
OR
Arming timeout (corresponding to
deployment time) expired
OR
FIRE_GOOD
DIAG
Diagnostic routine over
ARM
Prepare to deploy
NORMAL
or DIAG
At least one deploy condition asserted
between FENH, FENL or SPI ARM
frame
All resources active in NORMAL,
except the ones needed to perform
the diagnostic routine
L9965P
Functional description
DS14702 - Rev 4
page 11/104



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