Libraries GuideChapter 7: Design Elements (LD to NOR16)
M8_1E
8-to-1 Multiplexer with Enable
XC3000
| XC4000E
| XC4000X
| XC5200
| XC9000
| Spartan
| SpartanXL
| Spartan2
| Virtex
|
|---|
Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
|
M8_1E is an 8-to-1 multiplexer with enable. When the enable input (E) is High, the M8_1E multiplexer chooses one data bit from eight sources (D7 - D0) under the control of the select inputs (S2 - S0). The output (O) reflects the state of the selected input as shown in the truth table. When E is Low, the output is Low.
Inputs
| Outputs
|
|---|
E
| S2
| S1
| S0
| D7 - D0
| O
|
|---|
0
| X
| X
| X
| X
| 0
|
1
| 0
| 0
| 0
| D0
| D0
|
1
| 0
| 0
| 1
| D1
| D1
|
1
| 0
| 1
| 0
| D2
| D2
|
1
| 0
| 1
| 1
| D3
| D3
|
1
| 1
| 0
| 0
| D4
| D4
|
1
| 1
| 0
| 1
| D5
| D5
|
1
| 1
| 1
| 0
| D6
| D6
|
1
| 1
| 1
| 1
| D7
| D7
|
Dn represents signal on the Dn input; all other data inputs are don't-cares (X).
|
Figure 7.22 M8_1E Implementation XC3000, XC4000E, XC4000X, XC5200, XC9000, Spartan, SpartanXL