problem with XC18v01 and Spartan XCS20XL

D

Dennis Binder

Guest
Hello,

we encounter problems with a XC18v01.
In which way is it possible, that the prom loses
information ?
Most time everything works fine. But after delivering
the mashine to the customer, the content of the XC18v01 has changed.
We have no idea how this can happen.
All the JTAG-Signals of the prom are left open and we supply the
whole electronic with two seperated external power-supplies (3.3V 5V).
3.3V for FPGA and Prom.
5V for the digital electronic which interfaces to the FPGA.

I would be glad if anybody can help !

Dennis
 
Hello,
One of the possibility could be due to interference on the JTAG port you can
try the following to see if it resolves the problem:
1. Provide a pull up on the JTAG pins
2. Use the security bit, by which the contents cannot be read or changed,
the device can only be erased.

Regards
Sandeep
"Dennis Binder" <dennis.binder@ipm.fhg.de> wrote in message
news:bmgeum$bvb$1@news.BelWue.DE...
Hello,

we encounter problems with a XC18v01.
In which way is it possible, that the prom loses
information ?
Most time everything works fine. But after delivering
the mashine to the customer, the content of the XC18v01 has changed.
We have no idea how this can happen.
All the JTAG-Signals of the prom are left open and we supply the
whole electronic with two seperated external power-supplies (3.3V 5V).
3.3V for FPGA and Prom.
5V for the digital electronic which interfaces to the FPGA.

I would be glad if anybody can help !

Dennis
Click to expand...
 
thanks for your advice,
we will try this out.

greetings
dennis

Sandeep Kulkarni schrieb:
Hello,
One of the possibility could be due to interference on the JTAG port you can
try the following to see if it resolves the problem:
1. Provide a pull up on the JTAG pins
2. Use the security bit, by which the contents cannot be read or changed,
the device can only be erased.

Regards
Sandeep
"Dennis Binder" <dennis.binder@ipm.fhg.de> wrote in message
news:bmgeum$bvb$1@news.BelWue.DE...

Hello,

we encounter problems with a XC18v01.
In which way is it possible, that the prom loses
information ?
Most time everything works fine. But after delivering
the mashine to the customer, the content of the XC18v01 has changed.
We have no idea how this can happen.
All the JTAG-Signals of the prom are left open and we supply the
whole electronic with two seperated external power-supplies (3.3V 5V).
3.3V for FPGA and Prom.
5V for the digital electronic which interfaces to the FPGA.

I would be glad if anybody can help !

Dennis
Click to expand...
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top