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L4969UR-E Datasheet(PDF) 39 Page - STMicroelectronics

No. de pieza L4969UR-E
Descripción Electrónicos  System voltage regulator with fault tolerant low speed CAN transceiver
PDF  46 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L4969UR-E Datasheet(HTML) 39 Page - STMicroelectronics

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L4969UR-E, L4969URD-E
Control and status registers
Doc ID 022587 Rev 2
39/46
4.11
ADR 15: SYS system status register
Figure 28.
ADR 15: SYS system status register
The lower 6 bit of this register can be used to analyze the reason of startup (after NRESET
low). This information is valid until the first Watchdog-Acknowledge, and will then be
reinitialized to 000001.
STF
OTF
WNDF
STAT
NCRC
UCF
WAKE
NPOR
D7
D0
CRC-Checking
disabled
Warm start
after failure of
Window watchdog
Reserved
status flag
(test only)
Warm start
after < 7 missing
Ack during Startup
Warm start
after V1
Overtemp failure
Warm start
after 7 missing
Ack during Startup
Warm start
after leaving
prog. Sleep mode
Cold Start
after low VS



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