Achronix Speedster22i User Macro Guide Manuel d'utilisateur télécharger pdf (Page 19)

I/O Cells IOPAD

Speedster Macro Cell Library

www.achronix.com PAGE 2

IOPAD

Bidirectional I/O Pad

din

dout

pad

IOPAD

Figure 1-1: IOPAD Logic Symbol

IOPADisanasyn

chronousI/Opadwithactive‐highclockenable.

Table 1-3: Ports

Name Type Description

pad Bidirectional device pad.

din Data input.

dout Data output. T

he dout pin is driven with the value present on the pad pin.

Table 1-4: Parameters

Parameter Defined Values Default Value

location

iostandard “LVCMOS18”

drive

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 1-5: Output Function Table

din oe pad

Table 1-6: Input Function Table

pad dout

inout

input

output

“<pad_location>” ““

See Table1‐1

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

“fast”, “slow” “slow”

"pullup", "pulldown", "none" “none”

"none", "schmitt" “none”

X0 Z

11 1

1 2 ... 14 15 16 17 18 19 20 21 22 23 24 ... 223 224

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Achronix Speedster22i User Macro Guide Manuel d'utilisateur Page 19

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