Answers Database
Coolrunner/XPLA : How do I use the TDO as an output pin?
Record #8328
Product Family: Software
Product Line: CoolRunner
Product Part: XPLA ISP
Product Version: 4.04
Problem Title:
Coolrunner/XPLA : How do I use the TDO as an output pin?
Problem Description:
Urgency : Standard
General Description : How does one go about using the
TDO pin as an output pin in the Coolrunner devices?
Solution 1:
1. In order to use TDO as an output on the Coolrunner devices,
assign the desired signal to the pin number where TDO is.
2. Then, in the XPLA Pro GUI, click on Properties -> Show.
Make sure that the option "Reserve ISP pins" is unchecked.
3. Then click "Save As Default" and then click "Hide".
4. Once this is done, the design can be re-fit and the
desired signal will be mapped to the TDO pin.
If the "Reserve ISP pins" option is left checked off,
the tool will produce an error message in the .LOG file
which says:
FATAL ERROR 3229: Invalid pin specification or attribute for
pin <TDO pin number>
and the signal locked to the TDO pin will be routed to a different\
pin and the JEDEC file will still be created.
End of Record #8328 - Last Modified: 01/03/00 11:44 |
