Bluespec Tristate Wrapper

[ayush mittal]

Hey I was working on a project in bluespec and I need to implement a open drain line bidirectional. For that I used tristate package but how do i go about converting z to 1 in bluespec .

[Jamey Hicks]

I tend to use an explicit IOBUF for these cases, so that I do not have to worry about synthesis doing the correct thing with 'z'.

An IOBUF has separate I, O, and T ports. It's a bit confusing because the I port is the input to the IOBUF but it's the signal you're going to send to the pin when you deassert the tristate signal T.

See page 36 of https://www.xilinx.com/support/documentation/user_guides/ug471_7Series_SelectIO.pdf for more details on the IOBUF.

There is a wrapper for IOBUF in the XilinxCells package, I believe.

Cheers,

Jamey

On Mon, Jun 26, 2017 at 8:19 AM ayush mittal <29a...@gmail.com> wrote:

Hey I was working on a project in bluespec and I need to implement a open drain line bidirectional. For that I used tristate package but how do i go about converting z to 1 in bluespec .

--
You received this message because you are subscribed to the Google Groups "connectal" group.
To unsubscribe from this group and stop receiving emails from it, send an email to connectal+...@googlegroups.com.
To post to this group, send email to conn...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.