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4929B–AUTO–01/07
ATA6264 [Preliminary]
The trigger watchdog cycle can be set to the following retrigger times:
•4 ms
•8 ms
• 16 ms (default)
•32 ms
•64 ms
•128 ms
Cyclic phase:
Between two trigger commands a different SPI command must be seen by the SPI decoder
Figure 16-3. Watchdog Trigger Functional Principle (Successful Watchdog Trigger)
Serial
interface
communication
chip
internal
trigger
window
t_retrigger
t_retrigger
t_retrigger
RESQ
t
t
t
inactive
Additional
SPI-CMD
Trg Wdg CMD
Trg Wdg CMD
Additional
SPI-CMD
Trg Wdg CMD
Additional
SPI-CMD
Trg Wdg CMD
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