Unable to scan JTAG chain

I am using max 7000s series cpld.i am using altera byte blaster cable.
i am getting error as "unable to scan device chain .cann't scan jtag
chain".
what is meaning of this error?
what i need to do,to programme CPLD

On May 16, 6:57 am, mohan <kulka...@math.net> wrote:
> I am using max 7000s series cpld.i am using altera byte blaster cable.
> i am getting error as "unable to scan device chain .cann't scan jtag
> chain".
> what is meaning of this error?
> what i need to do,to programme CPLD


This message indicates that the byte blaster hardware is unable
to determine the devices in your chain.  The chain is a loop
going from the byte-blaster to TDI of the first device,
through that device to its TDO to TDI of the next device ...
finally back to the byte-blaster from the last TDO.  Usually
the message means there is a mis-connection somewhere
or a device that is missing power.  The mis-connection
may also be in one of the bused signals, TMS, TCK.

I'm not familiar with the byte blaster as I generally work
with Xilinx or Lattice, but there could also be an issue
of power getting to the byte-blaster itself or an issue
with its connection to your computer.  The error
message is not very specific.

HTH
Gabor

On May 16, 6:11 pm, Gabor <g...@alacron.com> wrote:
> On May 16, 6:57 am, mohan <kulka...@math.net> wrote:
>
> > I am using max 7000s series cpld.i am using altera byte blaster cable.
> > i am getting error as "unable to scan device chain .cann't scan jtag
> > chain".
> > what is meaning of this error?
> > what i need to do,to programme CPLD
>
> This message indicates that the byte blaster hardware is unable
> to determine the devices in your chain.  The chain is a loop
> going from the byte-blaster to TDI of the first device,
> through that device to its TDO to TDI of the next device ...
> finally back to the byte-blaster from the last TDO.  Usually
> the message means there is a mis-connection somewhere
> or a device that is missing power.  The mis-connection
> may also be in one of the bused signals, TMS, TCK.
>
> I'm not familiar with the byte blaster as I generally work
> with Xilinx or Lattice, but there could also be an issue
> of power getting to the byte-blaster itself or an issue
> with its connection to your computer.  The error
> message is not very specific.
>
> HTH
> Gabor


I am having a doubt,if the altera cpld is jtag compatible,can i use
xilinx parallel IV cable to programme altera device using quartus II
tool?