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L9965TS Datasheet(PDF) 12 Page - STMicroelectronics

Part # L9965TS
Description  Automotive SPI to isolated SPI transceiver
PDF  62 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9965TS Datasheet(HTML) 12 Page - STMicroelectronics

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5
Functional description
5.1
Device functional states
The following figure shows all possible L9965T and L9965TS states.
Figure 5. L9965T/TS functional state mode (FSM)
Table 7. Device functional states
State
Purpose
Reached
from
Condition
Active
resources
OFF
Device OFF
Any state
When VB voltage falls below the POR threshold
None
DEEPSLEEP
Ultra-low power
state for
managing long
inactivity
periods
NORMAL
•
GO2SLP command received AND no
CYCLIC_WAKEUP timer enabled
(GEN_CFG5.WAKEUP_CYCLIC_ENB=0)
•
OSC STUCK detected
•
V5V_OT detected
Wake up Via VIF
Wake up via SPI
Target
CYCLIC_
WAKEUP
•
OSC STUCK detected
•
V5V_OT detected
OFF
VB > POR threshold + hysteresis
CYCLIC_COUNT
Performs count
in order to
cyclically wake-
up the system
CYCLIC_
WAKEUP
CYCLIC_WAKEUP routine finished without internal fault
detected
Wake up Via VIF
Wake up via SPI
Target
Cyclic wakeup
timer as
configured
during NORMAL
mode
NORMAL
GO2SLP command validated AND CYCLIC_WAKEUP
timer enabled
(GEN_CFG5.WAKEUP_CYCLIC_ENB=1)
L9965T/L9965TS
Functional description
DS14987 - Rev 1
page 12/62



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