TMS320F28075PZP datasheet(104/192 Pages) TI

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7.11 Control Peripherals

Note

For the actual number of each peripheral on a specific device, see Table 5-1.

7.11.1 Enhanced Capture (eCAP)

The eCAP module can be used in systems where accurate timing of external events is important.

Applications for eCAP include:

• Speed measurements of rotating machinery (for example, toothed sprockets sensed through Hall sensors)

• Elapsed time measurements between position sensor pulses

• Period and duty cycle measurements of pulse train signals

• Decoding current or voltage amplitude derived from duty cycle encoded current/voltage sensors

The eCAP module includes the following features:

• 4-event time-stamp registers (each 32 bits)

• Edge-polarity selection for up to four sequenced time-stamp capture events

• Interrupt on either of the four events

• Single shot capture of up to four event timestamps

• Continuous mode capture of timestamps in a four-deep circular buffer

• Absolute time-stamp capture

• Difference (Delta) mode time-stamp capture

• All of the above resources dedicated to a single input pin

• When not used in capture mode, the eCAP module can be configured as a single-channel PWM output

(APWM).

The eCAP inputs connect to any GPIO input through the Input X-BAR. The APWM outputs connect to GPIO pins

through the Output X-BAR to OUTPUTx positions in the GPIO mux. See Section 6.4.2 and Section 6.4.3.

Figure 7-44 shows the block diagram of an eCAP module.

TMS320F28076, TMS320F28075

SPRS902J – OCTOBER 2014 – REVISED FEBRUARY 2021

www.ti.com

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TMS320F28075PZP Datasheet(PDF) 104 Page - Texas Instruments