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VNF1248F Datasheet(PDF) 64 Page - STMicroelectronics

Part # VNF1248F
Description  High-side switch controller with intelligent fuse protection for 12 V, 24 V and 48 V automotive applications
PDF  79 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

VNF1248F Datasheet(HTML) 64 Page - STMicroelectronics

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13.7
Self-test mode
This state is dedicated to execution of in-application checks performed by device on some key functionality. For
details, refer to dedicated section in this document.
The following figure summarizes main device functions status depending on device control states.
Table 62. Device functionalities status vs device states
Device
functionalities
Device states
Power
‑on
Stand-by
Unlocked
Locked
Self-test
Fail-safe
Output
Off
Off
See Table 24
See Table 24
See Table 24(1)
See Table 25
Bypass
Off
Off/On
See Table 24
See Table 24
See Table 24
See Table 25
V3V3
Internal LDO
Internal PRE-
REG
Internal LDO or
external regulator
Internal LDO or
external regulator
Internal LDO or
external regulator
Internal LDO or
external regulator
Device configuration
POR
Default
RAM
(frozen)
RAM
NVM or RAM(2)
RAM
NVM or RAM(2)
RAM REGs access
No access
No access
R/W/C
Control: R/W
Config.: R/W(3)
Status: R/C
R/W/C
Control: R/W(4)
Config.: R/W(4)
Status: R/C
SPI I/F
Inactive
Inactive
Active
Active
Active
Active
Channel protections
Inactive
Inactive(5)
Active
Active
Active(6)
Active
Device protections
Active
Inactive
Active
Active
Active
Active
Diag
Low/High
High
Low/High
Low/High
Low/High
Low/High
Cap. charge
Disabled
Disabled
Enabled
Enabled
Disabled
Enabled/Disabled(4)
1. Output off in case of stuck-on self-test execution.
2. Defined by dedicated option bit in the NVM.
3. Writable if NVM is used, otherwise is read-only.
4. Depending on fail-safe mode configuration.
5. Bypass fault protection active if bypass is on.
6. Specific protection inactive, depending on which self-test is executed.
VNF1248F
Functional description
DS14109 - Rev 7
page 64/79



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