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SPC56EL54x Datasheet(PDF) 134 Page - STMicroelectronics

Part # SPC56EL54x
Description  Dual issue five-stage pipeline core
PDF  165 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPC56EL54x Datasheet(HTML) 134 Page - STMicroelectronics

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Electrical characteristics
SPC56ELx, SPC564Lx
134/165
DocID15457 Rev 12
3.20.5
External watchdog window
If the application design requires the use of an external watchdog the data provided in
Section 3.20
can be used to determine the correct positioning of the trigger window for the
external watchdog. Figure 21 shows the relationships between the minimum and the
maximum duration of a given reset sequence and the position of an external watchdog
trigger window.
Figure 21. Reset sequence - External watchdog trigger window position
3.21
AC timing characteristics
AC Test Timing Conditions: Unless otherwise noted, all test conditions are as follows:
TJ = –40 to 150 °C
Supply voltages as specified in Table 10
Input conditions: All Inputs: tr, tf = 1 ns
Output Loading: All Outputs: 50 pF
3.21.1
RESET pin characteristics
The SPC56ELx/SPC564Lx implements a dedicated bidirectional RESET pin.
External Watchdog Window Closed
Earliest
Application
Start
Latest
Application
Start
Internal Reset Sequence
Start condition (signal or voltage rail)
External Watchdog Window Open
TReset, min
TReset, max
TWDStart, min
TWDStart, max
External Watchdog Window Closed
External Watchdog Window Open
Basic Application Init
Basic Application Init
Application time required to
prepare watchdog trigger
Watchdog needs to be triggered within this window
Watchdog trigger
Application Running
Application Running



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