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eCAP Registers
381
SPRUI07–March 2020
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Enhanced Capture (eCAP)
5.8.2.8 ECCTL2 Register (Offset = 15h) [reset = 6h]
ECCTL2 is shown in Figure 5-25 and described in Table 5-11.
Return to the Summary Table.
Capture Control Register 2
Figure 5-25. ECCTL2 Register
15 14 13 12 11 10 9 8
RESERVED APWMPOL CAP_APWM SWSYNC
R-0h R/W-0h R/W-0h R-0/W1S-0h
7 6 5 4 3 2 1 0
SYNCO_SEL SYNCI_EN TSCTRSTOP REARM STOP_WRAP CONT_ONESH
T
R/W-0h R/W-0h R/W-0h R-0/W1S-0h R/W-3h R/W-0h
Table 5-11. ECCTL2 Register Field Descriptions
Bit Field Type Reset Description
15-11 RESERVED R 0h
Reserved
10 APWMPOL R/W 0h
APWM output polarity select. This is applicable only in APWM
operating mode.
Reset type: SYSRSn
0h (R/W) = Output is active high (Compare value defines high time)
1h (R/W) = Output is active low (Compare value defines low time)
9 CAP_APWM R/W 0h
CAP/APWM operating mode select
Reset type: SYSRSn
0h (R/W) = ECAP module operates in capture mode. This mode
forces the following configuration:
- Inhibits TSCTR resets via CTR = PRD event
- Inhibits shadow loads on CAP1 and 2 registers
- Permits user to enable CAP1-4 register load
- CAPx/APWMx pin operates as a capture input
1h (R/W) = ECAP module operates in APWM mode. This mode
forces the following configuration:
- Resets TSCTR on CTR = PRD event (period boundary
- Permits shadow loading on CAP1 and 2 registers
- Disables loading of time-stamps into CAP1-4 registers
- CAPx/APWMx pin operates as a APWM output
8 SWSYNC R-0/W1S 0h
Software-forced Counter (TSCTR) Synchronizer. This provides the
user a method to generate a synchronization pulse through software.
In APWM mode, the synchronization pulse can also be sourced from
the CTR = PRD event.
Reset type: SYSRSn
0h (R/W) = Writing a zero has no effect. Reading always returns a
zero
1h (R/W) = Writing a one forces a TSCTR shadow load of current
ECAP module and any ECAP modules down-stream providing the
SYNCO_SEL bits are 0,0. After writing a 1, this bit returns to a
zero.
Note: Selection CTR = PRD is meaningful only in APWM mode
however, you can choose it in CAP mode if you find doing so
useful.
7-6 SYNCO_SEL R/W 0h
Sync-Out Select
Reset type: SYSRSn
0h (R/W) = Select sync-in event to be the sync-out signal (pass
through)
1h (R/W) = Select CTR = PRD event to be the sync-out signal
2h (R/W) = Disable sync out signal
3h (R/W) = Disable sync out signal
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