Datasheet

www.ti.com

eCAP Registers

Table 32-8. ECAP Control Register 2 (ECCTL2) Field Descriptions (continued)

Bits Field Value Description

3 REARM One-Shot Re-Arming Control, wait for stop trigger. Note: The re-arm function is valid in one shot or

continuous mode.

0 Has no effect (reading always returns a 0)

1 Arms the one-shot sequence as follows:

1) Resets the Mod4 counter to zero

2) Unfreezes the Mod4 counter

3) Enables capture register loads

2-1 STOP_WRAP Stop value for one-shot mode. This is the number (between 1-4) of captures allowed to occur

before the CAP(1-4) registers are frozen, capture sequence is stopped.

Wrap value for continuous mode. This is the number (between 1-4) of the capture register in which

the circular buffer wraps around and starts again.

0 Stop after Capture Event 1 in one-shot mode.

Wrap after Capture Event 1 in continuous mode.

1h Stop after Capture Event 2 in one-shot mode.

Wrap after Capture Event 2 in continuous mode.

2h Stop after Capture Event 3 in one-shot mode.

Wrap after Capture Event 3 in continuous mode.

3h Stop after Capture Event 4 in one-shot mode.

Wrap after Capture Event 4 in continuous mode.

Notes: STOP_WRAP is compared to Mod4 counter and, when equal, 2 actions occur:

• Mod4 counter is stopped (frozen)

• Capture register loads are inhibited

In one-shot mode, further interrupt events are blocked until re-armed.

0 CONT_ONESHT Continuous or one-shot mode control (applicable only in capture mode)

0 Operate in continuous mode

1 Operate in one-shot mode

1667

SPNU562–May 2014 Enhanced Capture (eCAP) Module

Submit Documentation Feedback