TLE6368_06 Datasheet, PDF (15/59 Pages) Infineon Technologies AG – Multi-Voltage Processor Power Supply

TLE 6368 / SONIC
Perfect triggering after Power on Reset
V _{Q_LDO1}
V _Rth1
1V
t
R1
t_RES
t
W atchdog
w indow
t_CW
t_SR
CW OW CW OW CW
CW OW
t
CS
t
1)
2)
2)
2)
ERR
t
Incorrect triggering
W atchdog
w indow
CW OW
t
CS
w ith W D-
trig = 1
t
3)
4)
1) W atchdog enable com m and w ith no trigger: D 0D 9D 14D 15=0100
2) W atchdog trigger: D 15=1
3) Pretrigger
4) M issing trigger
Legend:
O W = O pen window
CW = Closed w indow
Figure 7 Window watchdog timing
Figure 7 gives some timing information about the window watchdog. Looking at the
upper signals the perfect triggering of the watchdog is shown. When the 5V linear
regulator Q_LDO1 reaches its reset threshold, the reset delay time has to run off before
Data Sheet
15
Rev. 2.2, 2006-12-01