Given that microcontrollers can be reprogrammed multiple times, does this apply to CPLDs as well? In particular, I am interested in Xilinx's CoolRunner-II. Until now, I was positive about the re-programability, but after looking at the specs at one of the stores, I got confused:

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So, does it mean that I can program it only once?


1 Answer 1


No, and it probably illustrates the risk of looking at something that's been transcribed from a list or whatever rather than the original source.

The original datasheet you linked (primary source of information) lists the endurance at 1,000 erase/write cycles minimum (page 14).

  • \$\begingroup\$ That's a relief... Thank you. In general, re-probrammability is the known feature for all CPLDs, right? \$\endgroup\$
    – Nazar
    May 30, 2014 at 16:41
  • \$\begingroup\$ Nope. Actel (for one) has an antifuse technology that is one-time nonvolatile. You're perhaps unlikely to run into it unless you're doing military or space stuff. pldworld.com/_actel/html/digital.library/q1_2003/PDFs/… \$\endgroup\$ May 30, 2014 at 16:47
  • \$\begingroup\$ One more thing, please. Just to make sure I understand the specsheet right: the VCC must be 1.8V only, while the IO voltages can be up to 3.3V? \$\endgroup\$
    – Nazar
    May 30, 2014 at 16:53
  • 4
    \$\begingroup\$ Go to the data sheet and look at "IO Banking". The answer is yes. \$\endgroup\$ May 30, 2014 at 17:08
  • \$\begingroup\$ I wonder if "reprogrammability support" is talking about the ability of the chip to have one part of it reprogram another? A few programmable logic devices have such abilities; they can be very handy in some cases, though I've never had occasion to use one personally. \$\endgroup\$
    – supercat
    May 30, 2014 at 18:31

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