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F5_MUX

2-to-1 Lookup Table Multiplexer

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

figures/x4926n.gif

F5_MUX provides a multiplexer function in one half of a CLB. The output from the lookup table (LUT) in LC1 is connected to the I1 input of the F5_MUX. The output from the LUT in LC0 is connected to the I2 input. The direct input (DI) of LC0 is connected to the DI input of the F5_MUX. The output (O) reflects the state of the selected input. When Low, DI selects I1; when High, DI selects I2. Similarly, the F5_MUX can connect to the LUTs in LC2 and LC3. The F5_MUX can also implement any 5-input function in the top or bottom half of a CLB when the mapping of the function is controlled by F5MAP.

Inputs
Outputs
DI
I1
I2
O
0
1
X
1
0
0
X
0
1
X
1
1
1
X
0
0

Figure 5.3 F5_MUX Representation

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