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Snir123's avatar
Snir123
Icon for New Contributor rankNew Contributor
1 year ago

5M80ZE64I5N I/O

Hi all,

I am currently working on a design involving the CPLD 5M80ZE64I5N. In the datasheet, I observe a wide range of I/O voltages that seem to depend on the type of technology (LVTTL, LVCMOS, etc.).

  1. How is the technology defined? Which parameters determine the I/O minimum and maximum voltages?

Additionally, I plan to connect a USB-Blaster to the CPLD for programming purposes. One of the pins on the USB-Blaster is labeled VCCTRGT. This voltage, supplied by me to the USB-Blaster, can vary over a wide range (0-5.5V).

  1. How can I determine the exact voltage for the target? Where in the datasheet can I find this information?

Thanks ahead.

https://datasheet.ciiva.com/1412/mv51003-1412740.pdf?src-supplier=Digikey

Board Debug

4 Replies

  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    Hi,


    I think for Question 1, the technology defined by the I/O supply voltage (VCCIO) and the associate input and output voltage levels which is VIH, VIL, VOH and VOL. Each I/O standards is designed to be compatible with certain voltage levels and electrical characteristics to ensure proper communication between devices. For example, 3.3V LVCMOS have the maximum 4.0V for the logic high input voltage and minimum 1.7V to be recognized as input high. Else, for the input low, they need 0.8V for the maximum and -0.5V as minimum voltage level to be recognized as input low. This I/O standards must be supply with minimum 3.0V and maximum 3.6V to be able behave correctly.


    For Question 2, I seem not found the VCCTRGT pin that you mentioned. Can you help to clarify back on this? I give you the pin connection guidelines for Max V device from below link:

    https://www.intel.com/content/www/us/en/content-details/654129/max-v-device-family-pin-connection-guidelines.html?wapkw=max%20v%20pin%20connection&DocID=654129


    Regards,

    Aqid


    • Snir123's avatar
      Snir123
      Icon for New Contributor rankNew Contributor
      1 year ago

      For Question 2 :

      I found an updated datasheet of the USB Blaster, there you can find the recommended VCC(TRGT) -

  • AqidAyman_Altera's avatar
    AqidAyman_Altera
    Icon for Regular Contributor rankRegular Contributor
    1 year ago

    Since the answer has been provided and we do not receive any response from you on the previous question/reply/answer that we have provided, please login to ‘https://supporttickets.intel.com’, view details of the desire request, and post a feed/response within the next 15 days to allow me to continue to support you. After 15 days, this thread will be transitioned to community support. The community users will be able to help you on your follow-up questions.