Texas Instruments TMS320C6745 DSP - 13.2.2 Capture Mode Description; Capture Function Diagram

TSCTR
(counter-32bit)
RST
CAP1
(APRDactive)
LD
CAP2
(ACMP active)
LD
CAP3
(APRDshadow)
LD
CAP4
(ACMP shadow)
LD
Continuous/
Oneshot
CaptureControl
LD1
LD2
LD3
LD4
32
32
PRD[0-31]
CMP [0-31]
CTR[0-31]
ECAPx
Interrupt
Trigger
and
Flag
control
toInterrupt
Controller
CTR=CMP
32
32
32
32
32
ACMP
shadow
Event
Prescale
CTRPHS
(phaseregister-32bit)
SYNCOut
SYNCIn
Event
qualifier
Polarity
select
Polarity
select
Polarity
select
Polarity
select
CTR=PRD
CTR_OVF
4
PWM
compare
logic
CTR[0-31]
PRD[0-31]
CMP [0-31]
CTR=CMP
CTR=PRD
CTR_OVF
OVF
APWMmode
Delta-mode
SYNC
4
Captureevents
CEVT[1:4]
APRD
shadow
32
32
MODE SELECT
ECCTL2[SYNCI_EN,SYNCOSEL,SWSYNC]
ECCTL2[CAP/APWM]
EdgePolaritySelect
ECCTL1[CAPxPOL]
ECCTL1[EVTPS]
ECCTL1[CAPLDEN,CTRRSTx]
ECCTL2 [ RE-ARM, CONT/ONESHT, STOP_WRAP]
Registers:ECEINT,ECFLG,ECCLR,ECFRC
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SPRUH91D–March 2013–Revised September 2016
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Enhanced Capture (eCAP) Module
13.2.2 Capture Mode Description
Figure 13-3 shows the various components that implement the capture function.
Figure 13-3. Capture Function Diagram