mirror of https://github.com/openXC7/prjxray.git
21 lines
837 B
Markdown
21 lines
837 B
Markdown
# IOB18 Fuzzer
|
|
|
|
This fuzzer solves the bits related to the IO pads in the
|
|
high performance banks, which are present in most of the
|
|
Kintex and Virtex devices (a notable exception are K420T and K480T)
|
|
using bank numbers of 30 and above.
|
|
|
|
These banks have a maximum voltage of 1.8V which is the reason
|
|
why many of the BEL names end in 18 (as opposed to 33 for the
|
|
high range banks, which run on a maximum voltage of 3.3V).
|
|
|
|
Currently the focus is on supporting the most used IO standards;
|
|
On most boards, the high performance banks are connected to DDR3
|
|
memory and this mandates the support of single ended and differential
|
|
SSTL15.
|
|
Of course, all the LVCMOS variants and LVDS are a must have too.
|
|
|
|
Currently unsupported are digitally controlled impedance
|
|
(usually indicated by the regular IO standard names with a
|
|
_DCI and _T_DCI suffix).
|