Achronix Speedster22i User Macro Guide - Manual (Page 60)

I/O Cells TPAD
Speedster Macro Cell Library www.achronix.com PAGE 43
TPAD
Non-Registered Tristate Output Pad
din pad
TPAD
oe
Figure 1-22: TPAD Logic Symbol
TPAD is an non‐registered tristate output pad.
Table 1-48: Ports
Name Type Description
din Data input.
oe
Output Enbale. The data at the din input is driven to the pad output when
the oe input is driven high. The pad output will be driven into high-
impedance mode when oe is low.
pad Device output pad.
Table 1-49: Parameters
Parameter Defined Values Default Value
location
iostandard “LVCMOS18”
drive
slew
open_drain “true”, “false” “false”
keepmode “pullup”, “pulldown”, “none” “none”
pvt_comp “none”, “own” “none”
Table 1-50: Output Function Table
din oe pad
Verilog Instantiation Template
TPAD #(.location(""),
.iostandard("LVCMOS18"),
.drive("16"),
.slew("slow"),
.open_drain(“false”),
.keepmode(“none”),
.pvt_comp("none"))
instance_name (.din(user_din), .oe(user_oe),
.pad(user_pad));
input
input
output
“” ““
See Table 1‐1
"2", "4", "6", "8", "12", "16" "16"
“fast”, “slow” “slow”
0 1 0
1 1 1
X 0 Z