Purpose: Indicates whether there is a fixed additional delay between the enable/disable time for a tristatable I/O. (A tristatable I/O is an I/O with three output states: high, low, and high impedance.) 2 ns delay on rising edge, 0 ns delay on falling edge.
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Families |
Supported |
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Fusion |
Yes |
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ProASIC3E |
Yes |
|
ProASIC3 |
Yes |
|
ProASIC PLUS |
No |
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Axcelerator |
No |
|
ProASIC |
No |
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SX-A |
No |
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SX |
No |
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RTSX-S |
No |
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eX |
No |
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MX |
No |
Values: You can set the skew for a clock to either on or off.
Default value: The default skew displayed in the I/O Attribute Editor is off.
Note: A Tri State or "tristatable" logic gate has three output states: high, low, and high impedance. In a high impedance state, the output acts like a resistor with infinite resistance, which means the output is disconnected from the rest of the circuit.