ECAPx
PSout
div 2
PSout
div 4
PSout
div 6
PSout
div 8
PSout
div 10
0
1
/n
5
ECCTL1[EVTPS]
prescaler [5 bits]
(counter)
By−pass
Event prescaler
ECAPx pin
(from GPIO)
PSout
Capture Mode Description
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SPRUI07–March 2020
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Enhanced Capture (eCAP)
5.5.1 Event Prescaler
• An input capture signal (pulse train) can be prescaled by N = 2-62 (in multiples of 2) or can bypass the
prescaler.
This is useful when very high frequency signals are used as inputs. Figure 5-5 shows a functional
diagram and Figure 5-6 shows the operation of the prescale function.
Figure 5-5. Event Prescale Control
A When a prescale value of 1 is chosen ( ECCTL1[13:9] = 0,0,0,0,0 ), the input capture signal bypasses the prescale
logic completely.
Figure 5-6. Prescale Function Waveforms
5.5.2 Edge Polarity Select and Qualifier
Functionality and features include:
• Four independent edge polarity (rising edge/falling edge) selection muxes are used, one for each
capture event.
• Each edge (up to 4) is event qualified by the Modulo4 sequencer.
• The edge event is gated to its respective CAPx register by the Mod4 counter. The CAPx register is
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