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MPC5673K Datasheet(PDF) 109 Page - Freescale Semiconductor, Inc

Part # MPC5673K
Description  Microcontroller is a 32-bit embedded controller designed for advanced
PDF  140 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MPC5673K Datasheet(HTML) 109 Page - Freescale Semiconductor, Inc

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Electrical characteristics
MPC5675K Microcontroller Data Sheet, Rev. 4
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
109
3.21.4.3
External Reset via RESET
Figure 29 shows the voltage thresholds that determine the start of the reset sequences initiated by the
assertion of RESET as specified in Table 59.
Figure 29. Reset sequence start via RESET assertion
3.21.5
External watchdog window
If the application design requires the use of an external watchdog the data provided in Section 3.21, Reset
sequence, can be used to determine the correct positioning of the trigger window for the external
watchdog. Figure 30 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 30. Reset sequence—external watchdog trigger window position
0.65 × VDD_HV_IO
RESET_SUP
V
t
TReset, min starts here
TReset, max starts here
0.352 × VDD_HV_IO
Internal Reset Sequence
Start condition (signal or voltage rail)
Earliest
Application
Start
Latest
Application
Start
Application time required
to prepare watchdog trigger
TWDStart, min
TWDStart, max
TReset, min
TReset, max
Watchdog needs to be triggered within this window
External Watchdog window open
External Watchdog window open
External Watchdog window closed
Basic Application Init
Basic Application Init
Application Running
Application Running
Watchdog Trigger
External Watchdog window closed



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