General Description:
Do CoolRunner devices have hysteresis on the inputs?
CoolRunner XPLA3 devices have 50 mV of hysteresis on all inputs.
CoolRunner-II devices have a minimum of 500mV hysteresis that can be selected on each pin (via the Schmitt_trigger attribute). This can be done via the User Constraints File (UCF) or through the Assign Package Pins process in ISE.
UCF Example:
Net datain schmitt_trigger;
AR# 10101 | |
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日付 | 12/15/2012 |
ステータス | アクティブ |
種類 | 一般 |