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Libraries Guide
Chapter 7: Design Elements (LD to NOR16)

M2_1B2

2-to-1 Multiplexer with D0 and D1 Inverted

XC3000
XC4000E
XC4000X
XC5200
XC9000
Spartan
SpartanXL
Spartan2
Virtex
Macro
Macro
Macro
Macro
Macro
Macro
Macro
Macro
Macro

The M2_1B2 multiplexer chooses one data bit from two sources (D1 or D0) under the control of select input (S0). When S0 is Low, the output (O) reflects the state of !D0. When S0 is High, O reflects the state of !D1.

Inputs
Outputs
S0
D1
D0
O
1
1
X
0
1
0
X
1
0
X
1
0
0
X
0
1

Figure 7.18 M2_1B2 Implementation XC3000, XC4000E, XC4000X, XC5200, XC9000, Spartan, SpartanXL, Spartan2, Virtex