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| TLE6363 Datasheet, PDF (14/28 Pages) Infineon Technologies AG – Multifunctional Voltage Regulator and Watchdog | |||
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TLE 6363
Definition
TWD = 128 x tCYL
tSR = 64 x tCYL
tCW = 32 x tCYL
tOW = 32 x tCYL
Closed Window
Open Window
tWDR = 64 x tCYL
Definition
Worst Case
fOSC = fOSCmax
fOSC = fOSCmin
Reset start delay time after window
watchdog time-out
Reset duration time after window
watchdog time-out
t ECW
tEOW = end of open window
tCW+OWmin = (tCW + tOW) (1 - â)
tCWmax = tCW (1 + â)
tWD*
t OWmin
Example with:
tCYL = 1 ms
â = 10% (oscillator deviation)
tOWmin results to:
tOWmin = 32 ms - 0.1 x (32 ms + 64 ms)
tOWmin = 22.4 ms
* recommended watchdog trigger time
AET02951
Closed window Open window
Watchdog
trigger signal
Open window Closed window
WDI
Valid
WDI
Indifferent
WDI
Not valid
t ECW
= Watchdog decoder sample point
t EOW
AET02952
Figure 4 Window Watchdog Definitions
Data Sheet V 1.1
14
2000-11-8
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