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KEEPER

KEEPER Symbol

XC3000
XC4000E
XC4000X
XC5200
XC9000
Spartan
SpartanXL
Virtex
N/A
N/A
N/A
N/A
N/A
N/A
N/A
Primitive

figures/x8718.gif

KEEPER is a weak keeper element used to retain the value of the net connected to its bidirectional O pin. For example, if a logic 1 is being driven onto the net, KEEPER drives a weak/resistive 1 onto the net. If the net driver is then tri-stated, KEEPER continues to drive a week/resistive 1 onto the net.

For additional information on using a KEEPER element with SelectI/O components, refer to the “SelectI/O Usage Rules” in the "IBUF_selectIO" section.

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