Continue to Site

Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

What's the reason for XST warnings about overused bonded IOBs?

Status
Not open for further replies.
5

555lin

Junior Member level 3
Junior Member level 3
Joined
Aug 19, 2005
Messages
26
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Activity points
1,638
Guys, tell me please in which case should I list all the signals in the process and
in which case not all of them?

After synthesis in XST I got number of bonded IOBs overused 133%. I don't
quite understand what can be the reason for this.
 

Re: XST warning question

The number of IOB's is related to the number of pins you will use. Thus it is determined by the number of input/output signals in the top level module.

The number of pins you will use is a design choice, so either you are asking for too many pins for the chip you're using, or your chip is too small for your design.
 

    5

    555lin

    Points: 2
    Helpful Answer Positive Rating
Re: XST warning question

check the device manual or data sheet...
in your design number of input and outputs are greater than the
available i/o pins on device.........
 

XST warning question

You may need to remove some unnecessary IO pins or simply use a larger FPGA chip.
 

Status
Not open for further replies.

Similar threads

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Back
Top