Virtex II Pro XC2VP100
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Virtex II Pro XC2VP100

 
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rmanand
Guest
Posted: Mon Dec 19, 2005 5:15 pm    Post subject: Virtex II Pro XC2VP100 Reply with quote
Hi friends

The Virtex II pro (XC2VP100) device is not Configuring through Impact7.1


When i try to check with CRO what is happeing at the BOUNDARY SCAN SIGNAL
TDO ,TDI,TCK ,TMS

I found TDI,TMS,TDI signals are okay .THE TDO is always stuck a
one(pulled up by 220 ohm resisitor preferred by xilinix).

The prog Pin is pulled up to 3.3V through 4.7k.The Init pin is pulled u
to 3.3v through 4.7k.These all are xilinx reccomendation.

I could not understand what will be reason for the TDO is always high a
one and how to solve the problem.


The impact is always throughing Impact -583 error.
Expeting your valuabe replies

Thanks in advance
Back to top
Nitro
Guest
Posted: Tue Dec 20, 2005 4:07 am    Post subject: Re: Virtex II Pro XC2VP100 Reply with quote
Hello,

What cable are you using for programming? If it is a cable IV, Is it
powered (LED is green not yellow)? Is this the only device in the chain?
The cable IV needs power on pin 2 of the cable to match the IO supply of the
device to be programmed.
Check your mode control bits. I have programmed the V2P40 using both JTAG
and serial with the mode bits set for serial slave.
I would try a larger resistor and see if your symptoms change. (The Virtex
Pro spec states >200 ohms.) Try a 1K or 2K?

I am not familiar with the CRO acronym. Did you look at the timing and
levels with a scope? We had trouble with the TDO->TDI on one part in the
chain and the signals were not passing at 5MHz. Dropping the cable speed
helped but fixing the path (missing a pullup) got us running reliably.

Regards,
Bart

On Mon, 19 Dec 2005 10:52:37 -0600, rmanand wrote:

Quote:


Hi friends

The Virtex II pro (XC2VP100) device is not Configuring through Impact7.1e


When i try to check with CRO what is happeing at the BOUNDARY SCAN SIGNALS
TDO ,TDI,TCK ,TMS

I found TDI,TMS,TDI signals are okay .THE TDO is always stuck at
one(pulled up by 220 ohm resisitor preferred by xilinix).

The prog Pin is pulled up to 3.3V through 4.7k.The Init pin is pulled up
to 3.3v through 4.7k.These all are xilinx reccomendation.

I could not understand what will be reason for the TDO is always high at
one and how to solve the problem.


The impact is always throughing Impact -583 error.
Expeting your valuabe replies

Thanks in advance

Back to top
rmanand
Guest
Posted: Tue Dec 20, 2005 9:15 am    Post subject: Re: Virtex II Pro XC2VP100 Reply with quote
Hi

Thanks for your reply.

I am using CABLE parallel III . Actually two device is in the
chain.Both are not detected.So checking the First device.

I have set the control bit 101(m2,m1,m0).I have tired 1 1 1 combinatio
also .But no use.

I have already used 1.2K but Nochange .So i came down to 220 oh
resisitor.I will try to use 2k

I have checked TCK and TMS .TDI levels .It is okay.But TDO is logi
high always.Now the cable speed is 200khz only

Expecting your reply

Thanks in advance


Quote:
Hello,

What cable are you using for programming? If it is a cable IV, Is it
powered (LED is green not yellow)? Is this the only device in th
chain?
The cable IV needs power on pin 2 of the cable to match the IO supply o
the
device to be programmed.
Check your mode control bits. I have programmed the V2P40 using bot
JTAG
and serial with the mode bits set for serial slave.
I would try a larger resistor and see if your symptoms change. (Th
Virtex
Pro spec states >200 ohms.) Try a 1K or 2K?

I am not familiar with the CRO acronym. Did you look at the timing and
levels with a scope? We had trouble with the TDO->TDI on one part i
the
chain and the signals were not passing at 5MHz. Dropping the cabl
speed
helped but fixing the path (missing a pullup) got us running reliably.

Regards,
Bart

On Mon, 19 Dec 2005 10:52:37 -0600, rmanand wrote:



Hi friends

The Virtex II pro (XC2VP100) device is not Configuring throug
Impact7.1e


When i try to check with CRO what is happeing at the BOUNDARY SCA
SIGNALS
TDO ,TDI,TCK ,TMS

I found TDI,TMS,TDI signals are okay .THE TDO is always stuck at
one(pulled up by 220 ohm resisitor preferred by xilinix).

The prog Pin is pulled up to 3.3V through 4.7k.The Init pin is pulle
up
to 3.3v through 4.7k.These all are xilinx reccomendation.

I could not understand what will be reason for the TDO is always hig
at
one and how to solve the problem.


The impact is always throughing Impact -583 error.
Expeting your valuabe replies

Thanks in advance





Back to top
Antti Lukats
Guest
Posted: Wed Dec 21, 2005 12:16 am    Post subject: Re: Virtex II Pro XC2VP100 Reply with quote
"rmanand" <murugs_india@yahoo.com> schrieb im Newsbeitrag
news:r-udneWS_pGnJzreRVn_vQ@giganews.com...
Quote:
Hi

Thanks for your reply.

I am using CABLE parallel III . Actually two device is in the
chain.Both are not detected.So checking the First device.

I have set the control bit 101(m2,m1,m0).I have tired 1 1 1 combination
also .But no use.

I have already used 1.2K but Nochange .So i came down to 220 ohm
resisitor.I will try to use 2k

I have checked TCK and TMS .TDI levels .It is okay.But TDO is logic
high always.Now the cable speed is 200khz only

Expecting your reply

Thanks in advance


you are out of luck sitting on mal functioning board and/or FPGA

what you describe is 'broken' JTAG chain, this is the point where
you can not do any further testing until you get something non stuck 1
out of the TDO. unless that works the JTAG testing can not be done.

the m2m1m0 do not matter.
virtually nothing matters, as long as the JTAG pins are connected
to correct pads and FPGA is powered up correctly, then you
should see something.

just use impact debug mode, set 1111 to IR scan and click scan IR
until you then at least one 0 in the response you are out of luck.

check schematics, PCB power etc..
do it again
do it again
until you get the jtag scan working

if you have 2 devices in the chain you can not check the
JTAG unless both of them work so check TDO of the
first device first if that toggles and the TDO of the second
device not then error is with first.

but you can not detect 1 out of 2, it will be either
2 or nothing, in your case nothing

Antti
Back to top
Duane Clark
Guest
Posted: Wed Dec 21, 2005 1:16 am    Post subject: Re: Virtex II Pro XC2VP100 Reply with quote
rmanand wrote:
Quote:
Hi

Thanks for your reply.

I am using CABLE parallel III . Actually two device is in the
chain.Both are not detected.So checking the First device.

Do you have a pullup resistor on the TDI/TDO chain between the FPGAs? It
is needed, apparently only on the V2Pro devices (I use 150ohms).

Quote:
...

Hi friends

The Virtex II pro (XC2VP100) device is not Configuring through
Impact7.1e

When i try to check with CRO what is happeing at the BOUNDARY
SCAN SIGNALS TDO ,TDI,TCK ,TMS

I found TDI,TMS,TDI signals are okay .THE TDO is always stuck at
one(pulled up by 220 ohm resisitor preferred by xilinix).

The prog Pin is pulled up to 3.3V through 4.7k.The Init pin is
pulled up to 3.3v through 4.7k.These all are xilinx
reccomendation.

I could not understand what will be reason for the TDO is always
high at one and how to solve the problem.


The impact is always throughing Impact -583 error. Expeting your
valuabe replies
Back to top
rmanand
Guest
Posted: Wed Dec 21, 2005 9:15 am    Post subject: Re: Virtex II Pro XC2VP100 Reply with quote
Quote:
rmanand wrote:
Hi

Thanks for your reply

I checked the both device .TDO of the fist pin low without Pull u
with pull up it is high.It is not toggeled.

The second FPGA is also same

I have read somewhere, If TDO is high , FPGAS are in Reset state.Wha
Can be cause for the Reset.

I have checked the powersupply connections,The connection is okay Upt
the last PTH nearer to the pad .

I have put the Devices in Master slave mode.The CCK is coming out.S
device is okay.

We have two board.One board is working fine after adding TDo pul
up 220 ohm resistor.One board is the problem.


Please give your Valuable suggestion

Thanks and Regards
Muruganand.

Quote:
you are out of luck sitting on mal functioning board and/or FPGA

what you describe is 'broken' JTAG chain, this is the point where
you can not do any further testing until you get something non stuck 1
out of the TDO. unless that works the JTAG testing can not be done.

the m2m1m0 do not matter.
virtually nothing matters, as long as the JTAG pins are connected
to correct pads and FPGA is powered up correctly, then you
should see something.

just use impact debug mode, set 1111 to IR scan and click scan IR
until you then at least one 0 in the response you are out of luck.

check schematics, PCB power etc..
do it again
do it again
until you get the jtag scan working

if you have 2 devices in the chain you can not check the
JTAG unless both of them work so check TDO of the
first device first if that toggles and the TDO of the second
device not then error is with first.

but you can not detect 1 out of 2, it will be either
2 or nothing, in your case nothing

Antti




Quote:

Hi friends

The Virtex II pro (XC2VP100) device is not Configuring through
Impact7.1e

When i try to check with CRO what is happeing at the BOUNDARY
SCAN SIGNALS TDO ,TDI,TCK ,TMS

I found TDI,TMS,TDI signals are okay .THE TDO is always stuck at
one(pulled up by 220 ohm resisitor preferred by xilinix).

The prog Pin is pulled up to 3.3V through 4.7k.The Init pin is
pulled up to 3.3v through 4.7k.These all are xilinx
reccomendation.

I could not understand what will be reason for the TDO is always
high at one and how to solve the problem.


The impact is always throughing Impact -583 error. Expeting your
valuabe replies
Back to top
rmanand
Guest
Posted: Wed Dec 21, 2005 9:15 am    Post subject: Re: Virtex II Pro XC2VP100 Reply with quote
rmanand wrote:
Hi

Thanks for your reply.

Quote:
Do you have a pullup resistor on the TDI/TDO chain between the FPGAs
It
is needed, apparently only on the V2Pro devices (I use 150ohms).

Yeah i am suing 220 ohm resistor.Xilinx reccomends >200 ohm.so i di
not go below 200 ohm.





Quote:
...

Hi friends

The Virtex II pro (XC2VP100) device is not Configuring through
Impact7.1e

When i try to check with CRO what is happeing at the BOUNDARY
SCAN SIGNALS TDO ,TDI,TCK ,TMS

I found TDI,TMS,TDI signals are okay .THE TDO is always stuck at
one(pulled up by 220 ohm resisitor preferred by xilinix).

The prog Pin is pulled up to 3.3V through 4.7k.The Init pin is
pulled up to 3.3v through 4.7k.These all are xilinx
reccomendation.

I could not understand what will be reason for the TDO is always
high at one and how to solve the problem.


The impact is always throughing Impact -583 error. Expeting your
valuabe replies
Back to top
 
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