If the buffer is enabled, the output is the same as the input. If the buffer is disabled, the output is assigned a floating value (z). HDL Example 4.10 Tristate Buffer SystemVerilog module tristate(input logic [
You wouldn't be struggling with this IP issue if your tri-state buffer was inferred in your code. Quartus would simply implement the appropriate buffer from whatever FPGA family you're targeting. Cheers, Alex Translate 0 Kudos Copy link Reply ...
Warning (13035): Inserted always-enabled tri-state buffer between "VGAController:vgaController|dataH" and its non-tri-state driver. Error (13076): The node "VGAController:vgaController|dataH" has multiple drivers due to the non-tri-state driver "SDRAMController8Bit:sdramController...
so either timequest is going wrong or is misled or may be it has different rules for tristate buffer- just a guess. I can imagine that a tristate buffer OE will trigger the buffer output (as if like a clock on a register). This is a point of transition that you ...
FPGA: Cyclone V GX (5CGXFC4F7M11I7) and the 32 bit tri-state bus is implemented on chip and is created by a simple standard VHDL code that is instantiated in my top level design. The output of the tri-state buffer feeds directly into the bi-directional data bus. The bi-directional...
I have a design where my data bus is tri-stated and everything seems to work correctly till the tri-state buffer. For some reason the output of the tri-state buffer is delayed by a clock from the input ? Could there be some Quartus setting that might be doing this ? Translate...
Warning (13035): Inserted always-enabled tri-state buffer between "VGAController:vgaController|dataH" and its non-tri-state driver. Error (13076): The node "VGAController:vgaController|dataH" has multiple drivers due to the non-tri-state driver "SDRAMController8Bit:sd...
You wouldn't be struggling with this IP issue if your tri-state buffer was inferred in your code. Quartus would simply implement the appropriate buffer from whatever FPGA family you're targeting. Cheers, Alex Translate 0 Kudos Copy link Reply ...
You wouldn't be struggling with this IP issue if your tri-state buffer was inferred in your code. Quartus would simply implement the appropriate buffer from whatever FPGA family you're targeting. Cheers, Alex Translate 0 Kudos Copy link Reply All forum topics Previous topic Next topic ...
It is possible to improve delay even further by merging the AND/OR functions of a tristate buffer. FIG. 7is a flowchart of processing performed in implementing a tristate bus on an FPGA in accordance with an example embodiment of the invention. In general, the process uses the number of ...