Capture Function Diagram - Texas Instruments Concerto F28M35 Series Technical Reference Manual

Capture Mode Description
ECCTL2 [ SYNCI_EN, SYNCOSEL, SWSYNC]
SYNCIn
SYNCOut
32
APRD
shadow
32
32
32
to PIE
Registers: ECEINT, ECFLG, ECCLR, ECFRC
8.4.1 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.
diagram and Figure 8-5
794
C28 Enhanced Capture (eCAP) Module
Figure 8-3. Capture Function Diagram
CTRPHS
(phase register−32 bit)
CTR_OVF
OVF
TSCTR
(counter−32 bit)
Delta−mode
RST
32
CTR [0−31]
32
PRD [0−31]
LD1
CAP1
LD
(APRD active)
32
CMP [0−31]
32
LD2
CAP2
LD
(ACMP active)
32
ACMP
shadow
CAP3 LD3
LD
(APRD shadow)
LD4
CAP4
LD
(ACMP shadow)
Capture events
CEVT[1:4]
Interrupt
Trigger
and
CTR_OVF
Flag
CTR=PRD
control
CTR=CMP
shows the operation of the prescale function.
Copyright © 2012–2019, Texas Instruments Incorporated
ECCTL2[CAP/APWM]
APWM mode
CTR [0−31]
PRD [0−31]
CMP [0−31]
CTR=PRD
CTR=CMP
ECCTL1 [ CAPLDEN, CTRRSTx]
Polarity
select
Polarity
select
Event
qualifier
Polarity
select
Polarity
select
Edge Polarity Select
4
ECCTL1[CAPxPOL]
4
Continuous /
Oneshot
Capture Control
ECCTL2 [ RE−ARM, CONT/ONESHT, STOP_WRAP]
SPRUH22I – April 2012 – Revised November 2019
PWM
compare
logic
ECAPx
Event
Prescale
ECCTL1[EVTPS]
Figure 8-4 shows a functional
Submit Documentation Feedback
www.ti.com