Specifications

Capture Units
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6.8 Capture Units
Capture units enable logging of transitions on capture input pins. There are six
capture units, three is each EV module. Capture Units 1, 2, and 3 are associat-
ed with EVA and Capture Units 4, 5, and 6 are associated with EVB. Each cap-
ture unit is associated with a capture input pin.
Each EVA capture unit can choose GP timer 2 or 1 as its time base; however,
CAP1 and CAP2 cannot choose a different timer between themselves as their
timebase. Each EVB capture unit can choose GP timer 4 or 3 as its time base;
however, CAP4 and CAP5 cannot choose a different timer between them-
selves as their timebase.
The value of the GP timer is captured and stored in the corresponding 2-level-
deep FIFO stack when a specified transition is detected on a capture input pin
(CAPx). Figure 6–27 shows a block diagram of an EVA capture unit and
Figure 6–28 shows a block diagram of an EVB capture unit.