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
www.ti.com
Enhanced Capture (eCAP) Module
15.3.2.2.1 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 15-103 shows a
functional diagram and Figure 15-104 shows the operation of the prescale function.
Figure 15-103. Event Prescale Control
(1) When a prescale value of 1 is chosen (ECCTL1[13:9] = 0000) the input capture signal by-passes the
prescale logic completely.
Figure 15-104. Prescale Function Waveforms
1611
SPRUH73H–October 2011–Revised April 2013 Pulse-Width Modulation Subsystem (PWMSS)
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