MC68HC912D60 Datasheet, PDF (141/432 Pages) Freescale Semiconductor, Inc – M68HC12 Microcontrollers

Freescale Semiconductor, Inc.
I/O Ports with Key Wake-up
Key Wake-Up Input Filter
this time interval is shorter than t_KWSP, the majority voting logic may treat
the two consecutive pulses as a single valid pulse.
The filter is shared by all the KWU pins. Hence any valid triggering level
on any KWU pin is seen by the filter. The timing specification applies to
the input of the filter.
Glitch, filtered out, no STOP wake-up
Valid STOP Wake-Up pulse
t_KWSTP min.
t_KWSTP max.
Minimum time interval between pulses to be recognized as single pulses
t_KWSP
Figure 11-1. STOP Key Wake-up Filter (falling edge trigger) timing
68HC(9)12D60 — Rev 4.0
MOTOROLA
I/O Ports with Key Wake-up
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