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 [3:0] a, input logic en, output tri [3:0] y); assign y = en ? a...
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 top...
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 ...
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:sdramCont...
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...
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 may need to control its timing. As you have no registers in the flash but constraints required for ...
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...
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 may need to control its timing. As you have no registers in the flash but constraints required for the flash signals then you...
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 ...