Answers Database
XBLOX 5.x: internal error 20224, representation_error
Record #738
Product Family: Software
Product Line: XACT FPGA
Product Part: xblox
Problem Title:
XBLOX 5.x: internal error 20224, representation_error
Problem Description:
Urgency: Standard
General Description:
XBLOX may issue the following error on designs with very wide data paths.
*** XBLOX: ERROR 20224:
INTERNAL ERROR
Please contact Xilinx Technical Support. Please provide the
following details to the support personnel. This information
will be needed by the software developers.
1. representation_error(is(_529,+(*(268435455,16),15)),2,
'integer overflow')
This can be caused by having binary counters with a COUNT_TO value of
greater than 31 bits. XBLOX represents this COUNT_TO value as a signed
32-bit integer; therefore, the maximum COUNT_TO value is 2^31-1.
Solution 1:
As a workaround, cascade two half-sized COUNTERs. Although this provides a
valid solution, please note that this does reduces the performance somewhat
(especially in XC4000 designs), due to the break in the carry chain.
End of Record #738 - Last Modified: 05/24/99 11:43 |
