TMS320F28335, TMS320F28334, TMS320F28332
TMS320F28235, TMS320F28234, TMS320F28232
SPRS439I–JUNE 2007–REVISED MARCH 2011
www.ti.com
4.5 Enhanced CAP Modules (eCAP1/2/3/4/5/6)
The 2833x/2823x device contains up to six enhanced capture (eCAP) modules. Figure 4-6 shows a
functional block diagram of a module.
CTRPHS
(Phase Register - 32-bit)
APWM Mode
SYNCIn
CTR_OVF
OVF
CTR [0-31]
PRD [0-31]
CMP [0-31]
TSCTR
(Counter - 32-bit)
SYNCOut
PWM
Compare
Logic
Delta Mode
RST
32
CTR=PRD
CTR=CMP
CTR [0-31]
PRD [0-31]
32
32
LD1
CAP1
(APRD Active)
Polarity
Select
eCAPx
LD
APRD
Shadow
32
CMP [0-31]
32
Polarity
Select
LD2
32
CAP2
(ACMP Active)
LD
Event
Qualifier
ACMP
Shadow
Event
Prescale
32
Polarity
Select
LD3
LD4
32
32
CAP3
(APRD Shadow)
LD
CAP4
(ACMP Shadow)
Polarity
Select
LD
4
Capture Events
4
CEVT[1:4]
Interrupt
Trigger
and
Flag
Control
Continuous/
One-Shot
Capture Control
to PIE
CTR_OVF
CTR=PRD
CTR=CMP
Figure 4-6. eCAP Functional Block Diagram
74
Peripherals
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