Working with a coolrunner2 CPLD. Is there a way to erase whatever has been programmed into the CPLD, without using JTAG?
CPLD erase??
Started by ●March 21, 2007
Reply by ●March 21, 20072007-03-21
On Mar 21, 8:34 am, mtsuka...@gmail.com wrote:> Working with a coolrunner2 CPLD. Is there a way to erase whatever has > been programmed into the CPLD, without using JTAG?As far as I know, the only way to erase/program Xilinx CPLDs is via JTAG. -Dave Pollum
Reply by ●March 21, 20072007-03-21
mtsuka...@gmail.com wrote:> Working with a coolrunner2 CPLD. Is there a way to erase whatever has > been programmed into the CPLD, without using JTAG?Unless you're storing crytographic keys in the CPLD, what's the point of erasing it without using JTAG? Dave Pollum wrote:> As far as I know, the only way to erase/program Xilinx CPLDs is via > JTAG.For erasure, thermite works too. A hammer may work but is not as certain.
Reply by ●March 22, 20072007-03-22
On Mar 21, 5:11 pm, Eric Smith <e...@brouhaha.com> wrote:> mtsuka...@gmail.com wrote: > > Working with a coolrunner2 CPLD. Is there a way to erase whatever has > > been programmed into the CPLD, without using JTAG? > > Unless you're storing crytographic keys in the CPLD, what's the point > of erasing it without using JTAG? > > Dave Pollum wrote: > > As far as I know, the only way to erase/program Xilinx CPLDs is via > > JTAG. > > For erasure, thermite works too. A hammer may work but is not as certain.well... the CPLD I'm using is in a BGA package (which means I can't attach leads to the pins), and another device on the JTAG chain got stuck in reset, so the chain 'broke' and couldn't be accessed. That's why I was asking