Libraries GuideChapter 4: Design Elements (CAPTURE_SPARTAN2 to DECODE64)
D2_4E
2- to 4-Line Decoder/Demultiplexer with Enable
XC3000
| XC4000E
| XC4000X
| XC5200
| XC9000
| Spartan
| SpartanXL
| Spartan2
| Virtex
|
|---|
Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
| Macro
|
When the enable (EN) input of the D2_4E decoder/demultiplexer is High, one of four active-High outputs (D3 - D0) is selected with a 2-bit binary address (A1 - A0) input. The non-selected outputs are Low. Also, when the EN input is Low, all outputs are Low. In demultiplexer applications, the EN input is the data input.
Inputs
| Outputs
|
|---|
A1
| A0
| E
| D3
| D2
| D1
| D0
|
|---|
X
| X
| 0
| 0
| 0
| 0
| 0
|
0
| 0
| 1
| 0
| 0
| 0
| 1
|
0
| 1
| 1
| 0
| 0
| 1
| 0
|
1
| 0
| 1
| 0
| 1
| 0
| 0
|
1
| 1
| 1
| 1
| 0
| 0
| 0
|
Figure 4.54 D2_4E Implementation XC3000, XC4000E, XC4000X, XC5200, XC9000, Spartan, SpartanXL, Spartan2, Virtex