xc4020e-xl Xilinx Corp., xc4020e-xl Datasheet - Page 17
xc4020e-xl
Manufacturer Part Number
xc4020e-xl
Description
Xc4000e And Xc4000x Series Field Programmable Gate Arrays
Manufacturer
Xilinx Corp.
Datasheet
1.XC4020E-XL.pdf
(68 pages)
- Current page: 17 of 68
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May 14, 1999 (Version 1.6)
Figure 15: Simplified Block Diagram of XC4000E IOB
Figure 16: Simplified Block Diagram of XC4000X IOB (shaded areas indicate differences from XC4000E)
Clock Enable
Output Clock
Input Clock
Enable
Output
Clock
Clock
Clock
Input
Out
R
Out
T
I
I
1
2
I
I
T
1
2
XC4000E and XC4000X Series Field Programmable Gate Arrays
Output MUX
Flip-Flop
D
CE
Q
CE
Latch
Flop/
Flip-
Q
D
0
1
Flip-Flop/
CE
Q
Latch
Flip-Flop
D
CE
D
Q
Delay
Capture
Latch
Fast
Slew Rate
Control
Delay
Buffer
Input
Q
Latch
D
G
Delay
Output
Buffer
Buffer
Input
Slew Rate
Pull-Down
Output
Control
Buffer
Pull-Up/
Passive
Pull-Down
Passive
Pull-Up/
X6704
Pad
X5984
Pad
6-21
6
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