Texas Instruments TMS320 2833 Series

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 PIE
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
www.ti.com Capture Mode Description
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SPRUI07–March 2020
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Enhanced Capture (eCAP)
5.5 Capture Mode Description
Figure 5-4 shows the various components that implement the capture function.
Figure 5-4. eCAP Block Diagram