
I/O Cells IOPAD_D
Speedster Macro Cell Library
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Table 1-8: Parameters
Parameter Defined Values Default Value
location
iostandard “LVCMOS18”
drive
txregmode
rxregmode
oeregmode
rstmode
rstvalue
slew
keepmode
hysteresis
open_drain “true”, “false” “false”
pvt_comp “none”, “own” “none”
odt “off ”, “on” “off ”
termination “50”, “60”, “75”, “100”
, “120”, “240” “50”
Table 1-9: Output Function Table (txregmode = ”reg”,
oeregmode = “reg”, rstmode = “async”)
din txdata_en oe oerstn txrstn txclk pad
Table 1-10: Output Function Table (txregmode = ”reg”, oeregmode = “reg”, rstmode = “sync”)
din txdata_en oe oerstn txrstn txclk oeclk pad
Table 1-11: Input Function table (rxregmode = “reg”)
pad rxdata_en rxclk dout
“<pad_location>” ““
See Table1‐1
"2", "4", "6", "8", "12", "16" "16"
“reg”, ”nonreg” “reg”
“reg”, ”nonreg” “reg”
“reg”, ”nonreg” “reg”
“sync”, “async” “async”
“low”, “high” “low”
“fast”, “slow” “slow”
"pullup", "pulldown", "none" “none”
"none", "schmitt" “none”
XXX0X
X
Z
X0
X11 Hold previous data
X1011 Z
01111 0
11111 1
X1011 Z
XXX0X Z
X0
X11Hold previous data
X1011 Z
01111 0
11111 1
X1011 Z
01 0
11 1
X1 X
Z1 X
X,Z
0 Hold previous data
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