To Next Page

To Previous Page

eCAP

7 - 42 TMS320F2837xD Microcontroller Workshop - Control Peripherals

eCAP Module Block Diagram

– Capture Mode

32-Bit

Time-Stamp

Counter

Capture 1

Event

Prescale

Polarity

Select 1

Polarity

Select 2

Polarity

Select 3

Polarity

Select 4

Capture 2

Capture 3

Capture 4

Event Logic

ECAPx

CAP1POL

CAP2POL

CAP3POL

CAP4POL

PRESCALE

CPUx.SYSCLK

The eCAP module captures signal transitions on a dedicated input pin and sequentially loads a

32-bit time-base counter value in up to four 32-bit time-stamp capture registers (CAP1 – CAP4).

By using a 32-bit counter, rollover is minimized. Independent edge polarity can be configured as

rising or falling edge, and the module can be run in either one-shot mode for up to four time-

stamp events or continuous mode to capture up to four time-stamp events operating as a circular

buffer. The capture input pin is routed through the Input X-Bar, allowing any GPIO pin on the

device to be used as the input. Also, the input capture signal can be pre-scaled and interrupts

can be generated on any of the four capture events. The time-base counter can be run in either

absolute or difference (delta) time-stamp mode. In absolute mode the counter runs continuously,

whereas in difference mode the counter resets on each capture

Texas Instruments TMS320F2837 D Series Workshop Guide And Lab Manual

Other manuals for Texas Instruments TMS320F2837 D Series