Achronix Speedster22i User Macro Guide - Manual (Page 37)

I/O Cells IPAD_DIFF
Speedster Macro Cell Library www.achronix.com PAGE 20
IPAD_DIFF
Non-Registered Differential Input Pad
dout
pad
IPAD_DIFF
padn
Figure 1-10: IPAD_DIFF Logic Symbol
IOPAD is a non‐registered differential input pad with complementary input pads pad and
padn with output dout.
Table 1-22: Ports
Name Type Description
pad Device pad.
padn
Complement Device pad. The padn input must be driven with the logical
complement of the pad input.
dout Data output.
Table 1-23: Parameters
Parameter Defined Values Default Value
locationp
locationn
iostandard “LVDS”
pvt_comp “none”, “own” “none”
odt “off”, “on” “off”
termination “50”, “60”, “75”, “100”, “120”, “240” “50”
Table 1-24: Input Function Table
pad padn dout
input
input
output
“<pad_location>” ““
“<pad_location>” ““
See Table 1‐2
0 0 X
0 1 0
1 0 1
1 1 X
Z Z X