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L9965P Datasheet(PDF) 12 Page - STMicroelectronics

Part # L9965P
Description  Automotive single channel pyro-fuse driver
PDF  104 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9965P Datasheet(HTML) 12 Page - STMicroelectronics

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3.1.1
SPI SLEEP commands
To force the device to go in a DEEP-SLEEP state, the following procedure shall be implemented:
1. MCU writes 0x77 into the SPECIAL_KEY register to enter partial go-to-sleep;
2. MCU writes 0xCC into the SPECIAL_KEY register to confirm go-to-sleep.
3.1.2
Diagnostics summary
This section describes in detail the enable/masking of all the diagnostic features implemented in the device,
according to the functional state.
Note:
Many diagnostics may be subject to user-defined configurations and/or enable. The following table assumes that
all diagnostics have been enabled in the device configuration.
Table 7. Diagnostics summary
State
ERBST
OV
PS
UV/OV
FENx
decoder
diag
Deployment
autoretry
Diag
routine
Oscillator
monitor
Reference
monitor
GND
loss
Config
integrity
check
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
DEEP
‑SLEEP
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
DIAG
AON
AON
AON
OFF
OD/CYC
AON
AON
AON
AON
NORMAL
AON
AON
AON
OFF
OFF
AON
AON
AON
AON
ARM
AON
AON
AON
AON
OFF
AON
AON
AON
AON
Note:
•
AON → Diagnostic always-on and running
•
OD → Diagnostic available on-demand
•
CYC → Diagnostic cyclically activated by internal timer
•
OFF → Diagnostic disabled/masked
3.2
Power management
The IC is supplied by ERBST pin, which is then used to generate all the internal regulated supplies.
The IC is usually supplied by an isolated DC/DC converter feeding from the 12 V LV supply (reinforced isolation);
alternatively by an isolated DC/DC converter from the HV battery pack.
3.2.1
Power management electrical parameters
All parameters are tested and guaranteed in the following conditions, unless otherwise noted: all supplies
according to the Table 3; TJ according to the Table 2.
L9965P
Functional description
DS14702 - Rev 4
page 12/104



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