TMS320F28379D Datasheet, PDF (115/212 Pages) Texas Instruments – Dual-Core Delfino Microcontrollers

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5.9 Control Peripherals
TMS320F28379D, TMS320F28377D
TMS320F28376D, TMS320F28375D, TMS320F28374D
SPRS880F – DECEMBER 2013 – REVISED NOVEMBER 2015
NOTE
For the actual number of each peripheral on a specific device, see Table 3-1.
5.9.1 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 4.5.2 and
Section 4.5.3.
Figure 5-45 shows the block diagram of an eCAP module.
Copyright © 2013–2015, Texas Instruments Incorporated
Specifications 115
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