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ST72321R7-Auto Datasheet(PDF) 42 Page - STMicroelectronics

Part # ST72321R7-Auto
Description  PLL for 2x frequency multiplication
PDF  243 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72321R7-Auto Datasheet(HTML) 42 Page - STMicroelectronics

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Supply, reset and clock management
ST72321xx-Auto
42/243
Doc ID 13829 Rev 1
6.5.5
Internal watchdog RESET
The RESET sequence generated by an internal Watchdog counter overflow is shown in
Figure 13.
Starting from the Watchdog counter underflow, the device RESET pin acts as an output that
is pulled low during at least tw(RSTL)out.
Figure 13.
RESET sequences
VDD
RUN
RESET PIN
EXTERNAL
WATCHDOG
Active Phase
VIT+(LVD)
VIT-(LVD)
th(RSTL)in
tw(RSTL)out
RUN
th(RSTL)in
Active
WATCHDOG UNDERFLOW
tw(RSTL)out
RUN
RUN
RUN
RESET
RESET
SOURCE
SHORT EXT.
RESET
LVD
RESET
LONG EXT.
RESET
WATCHDOG
RESET
INTERNAL RESET (256 or 4096 TCPU)
VECTOR FETCH
tw(RSTL)out
Phase
Active
Phase
Active
Phase
DELAY



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