Achronix Speedster22i User Macro Guide Uživatelský manuál stáhnout pdf (Strana 23)

I/O Cells IOPAD_D

Speedster Macro Cell Library

www.achronix.com PAGE 6

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 Table1‐1

"2", "4", "6", "8", "12", "16" "16"

“reg”, ”nonreg” “reg”

“sync”, “async” “async”

“low”, “high” “low”

“fast”, “slow” “slow”

"pullup", "pulldown", "none" “none”

"none", "schmitt" “none”

XXX0X

X11 Hold previous data

X1011 Z

01111 0

11111 1

X1011 Z

XXX0X Z

X11Hold previous data

X1011 Z

01111 0

11111 1

X1011 Z

01 0

11 1

X1 X

Z1 X

X,Z

0  Hold previous data

1 2 ... 18 19 20 21 22 23 24 25 26 27 28 ... 223 224

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