TMS320F28027_16 Datasheet, PDF (108/138 Pages) Texas Instruments – Piccolo Microcontrollers

TMS320F28027, TMS320F28026, TMS320F28023, TMS320F28022
TMS320F28021, TMS320F28020, TMS320F280200
SPRS523K – NOVEMBER 2008 – REVISED JUNE 2016
www.ti.com
6.9.8 Enhanced Capture Module (eCAP1)
The device contains an enhanced capture (eCAP) module. Figure 6-38 shows a functional block diagram
of a module.
SYNCIn
SYNCOut
CTRPHS
(phase register−32 bit)
TSCTR
OVF
(counter−32 bit)
RST
CTR_OVF
Delta−mode
32
32
CTR [0−31]
PRD [0−31]
APWM mode
CTR [0−31]
PRD [0−31]
CMP [0−31]
PWM
compare
logic
CTR=PRD
CTR=CMP
32
CAP1
(APRD active)
LD
LD1
APRD
shadow
32
32
CMP [0−31]
32
CAP2
(ACMP active)
LD
LD2
32 ACMP
shadow
Event
qualifier
32
CAP3
(APRD shadow)
LD
LD3
Polarity
select
Polarity
select
Polarity
select
Event
Prescale
eCAPx
32
CAP4
(ACMP shadow)
LD
LD4
4
Capture events
CEVT[1:4]
Polarity
select
4
to PIE
Interrupt
Trigger
and
Flag
control
CTR_OVF
CTR=PRD
CTR=CMP
Continuous /
Oneshot
Capture Control
Copyright © 2016, Texas Instruments Incorporated
Figure 6-38. eCAP Functional Block Diagram
The eCAP module is clocked at the SYSCLKOUT rate.
The clock enable bits (ECAP1 ENCLK) in the PCLKCR1 register turn off the eCAP module individually (for
low power operation). Upon reset, ECAP1ENCLK is set to low, indicating that the peripheral clock is off.
108 Detailed Description
Copyright © 2008–2016, Texas Instruments Incorporated
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