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
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.
shows a
functional diagram and
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)
Copyright © 2011–2013, Texas Instruments Incorporated