Spartan-3E FPGA Family: Functional Description
The wide multiplexers can be used by the automatic tools or
instantiated in a design using a component such as the
F5MUX. The symbol, signals, and function are described in
Figure 21, Table 12, and Table 13. The description is similar
for the F6MUX, F7MUX, and F8MUX. Each has versions
with a general output, local output, or both.
X-Ref Target - Figure 21
I0
I1
S
0
1
LO
O
DS312-2_35_021205
Figure 21: F5MUX with Local and General Outputs
Table 12: F5MUX Inputs and Outputs
Signal
I0
Function
Input selected when S is Low
Input selected when S is High
Select input
I1
S
LO
Local Output that connects to the F5 or FX CLB pins,
which use local feedback to the FXIN inputs to the
FiMUX for cascading
O
General Output that connects to the general-purpose
combinatorial or registered outputs of the CLB
Table 13: F5MUX Function
Inputs
Outputs
S
0
0
1
1
I0
1
I1
X
X
1
O
1
0
1
0
LO
1
0
0
X
X
1
0
0
DS312 (v4.2) December 14, 2018
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Product Specification
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XILINX [ XILINX, INC ]
