Answers Database
PAR 1.4: ERROR: x52ap:111 5200 Design uses to many TBUF's or BUFT's
Record #2583
Product Family: Software
Product Line: FPGA Implementation
Product Part: par
Product Version: 1.4
Problem Title:
PAR 1.4: ERROR: x52ap:111 5200 Design uses to many TBUF's or BUFT's
Problem Description:
Urgency: Standard
ERROR:x52ap:111 - This design contains 64 three-state (TBUF) output signals. However, the target dev
ice can only accommodate a maximum of 60 three-state signals. Please either reduce the number of th
ree-state signals in your design accordingly, or retarget your design to a larger XC5200 device.
This can be seen when you move a design that used to place and route in XACT, but when moved to M1 i
ssues the error.
This is the result of a software change. In a 5200 CLB there are 4 Logic Cells. Each of these Logic
Cells can drive a BUFT which in turn drives a Longline. In Xact the software would allow you to use
all 4 of these BUFT's. However, M1 only allows you drive 3 of the 4.
Solution 1:
If the design uses more than 75% of the BUFT's you will need to modify the design or move to a large
r part.
If the design uses less than 75% of the BUFT's the error is the result of user constraining to many
BUFT's to a certain row or column. The user will need to adjust his constraints accordingly.
This will be fixed in M1.5.
End of Record #2583 - Last Modified: 04/30/98 14:36 |
