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SPC564L54L5 Datasheet(PDF) 129 Page - STMicroelectronics

Part # SPC564L54L5
Description  32-bit Power Architecture® microcontroller for automotive SIL3/ASILD chassis and safety applications
PDF  160 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

SPC564L54L5 Datasheet(HTML) 129 Page - STMicroelectronics

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SPC56XL60/54
Electrical characteristics
Doc ID 15457 Rev 8
129/160
External reset via RESET
Figure 19 shows the voltage thresholds that determine the start of the reset sequences
initiated by the assertion of RESET as specified in Table 33.
Figure 19. Reset sequence start via RESET assertion
3.19.5
External watchdog window
If the application design requires the use of an external watchdog the data provided in
Section 3.19, Reset sequence can be used to determine the correct positioning of the
trigger window for the external watchdog. Figure 20 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 20. Reset sequence - External watchdog trigger window position
TReset, max starts here
TReset, min starts here
RESET_B
0.65 * VDD_HV_IO
t
V
0.35 * VDD_HV_IO
RESET
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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