By default, unused I/O pins on a Virtex device will have their weak pull-down resistors activated (~ 50k-100k ohms to ground). In 3.1i Alliance and Foundation software, the user can instead specify that unused I/Os be either pulled up or left floating. This is accomplished through a hidden BitGen setting.
AR# 7939 | |
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Date | 04/24/2012 |
Status | Archive |
Type | General Article |