• State
  • Locked Locked
  • Replies 3 replies
  • Subscribers 83 subscribers
  • Views 538 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

How many eCAP ports does TMS320F28027 have?

Xiaoyong Zhu
Prodigy 20 points

Other Parts Discussed in Thread: TMS320F28027

Hi, I'm using TMS320F28027 currently.In my design, I'd like to use 2 eCAP ports to capture two waveforms. But I found that this chip have only one eCAP port(Port 25 or port 40, in PQFP package), which I'm not very sure. Could anyone tell me how many eCAP ports does TMS320F28027 have? If it has more than one eCAP port, which related registers should I config? 

Best regards.

  • 0
    TI__Guru 61235 points

    Xiaoyong,

    TMS320F28027 has one eCAP module.  This can be seen in the device datasheet, SPRS523D, p.5, Table 2-1.  I think your confusion stems from the fact that the eCAP input can be multiplexed onto two different pins: #25 and #40 (on the 48-pin package).  But, there is still only one eCAP module.

    If you need two eCAP modules, you should look at the TMS320F280x devices, such as TMS320F2802-60.  Alternately, you might be able to use the F28027 single eCAP if you don't need both capture units active at the same time.  You could connect the two signals to pins #25 and #40, and then use the GPIO mux registers to flip between the two.

    Regards,

    David

  • 0
    Genius 4925 points

    Hello,

    TMS320F28027 has indeed only one eCAP. If you need more, you need to upgrade to another processor. see the parametric search page

    http://focus.ti.com/paramsearch/docs/parametricsearch.tsp?sectionId=95&tabId=1220&familyId=916&family=mcu

    Best regards

    Andreas

  • 0 in reply to David M. Alter
    Prodigy 20 points

    Thank you for your kind answer~