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參數(shù)資料
| 型號(hào)： | XCS30XL-4VQ84I |
| 廠商： | Xilinx, Inc. |
| 英文描述： | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| 中文描述： | 斯巴達(dá)和Spartan - xL的家庭現(xiàn)場(chǎng)可編程門陣列 |
| 文件頁(yè)數(shù)： | 11/82頁(yè) |
| 文件大?。?/td> | 863K |
| 代理商： | XCS30XL-4VQ84I |
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Spartan and Spartan-XL Families Field Programmable Gate Arrays
DS060 (v1.6) September 19, 2001
Product Specification
1-800-255-7778
R
3-State Long Line Drivers
A pair of 3-state buffers is associated with each CLB in the
array. These 3-state buffers (BUFT) can be used to drive
signals onto the nearest horizontal longlines above and
below the CLB. They can therefore be used to implement
multiplexed or bidirectional buses on the horizontal lon-
glines, saving logic resources.
There is a weak keeper at each end of these two horizontal
longlines. This circuit prevents undefined floating levels.
However, it is overridden by any driver.
The buffer enable is an active High 3-state (i.e., an active
Low enable), as shown in Table 11.
Three-State Buffer Example
Figure 18 shows how to use the 3-state buffers to imple-
ment a multiplexer. The selection is accomplished by the
buffer 3-state signal.
Pay particular attention to the polarity of the T pin when
using these buffers in a design. Active High 3-state (T) is
identical to an active Low output enable, as shown in
Figure 17: Detail of Spartan/XL Dedicated Carry Logic
01
M
0
1
01
M
0
1
M
0
3
M
1
M
I
G1
G4
F2
F1
F3
COUT
COUT0
G2
G3
F4
CIN
DS060_17_080400
TO
FUNCTION
GENERATORS
M
Table 11: Three-State Buffer Functionality
IN
T
OUT
X1
Z
IN
0
IN
Figure 18: 3-state Buffers Implement a Multiplexer
DN
DC
DB
DA
ABC
N
Z = (DA A) + (DB B) + (DC C) + (DN N)
~100 k
"Weak Keeper"
DS060_18_080400
BUFT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XCS30XL-4VQG100C | 功能描述:IC SPARTAN-XL FPGA 30K 100-VQFP RoHS:是 類別:集成電路 (IC) >> 嵌入式 - FPGA（現(xiàn)場(chǎng)可編程門陣列） 系列:Spartan®-XL 標(biāo)準(zhǔn)包裝:40 系列:Spartan® 6 LX LAB/CLB數(shù):3411 邏輯元件/單元數(shù):43661 RAM 位總計(jì):2138112 輸入/輸出數(shù):358 門數(shù):- 電源電壓:1.14 V ~ 1.26 V 安裝類型:表面貼裝 工作溫度:-40°C ~ 100°C 封裝/外殼:676-BGA 供應(yīng)商設(shè)備封裝:676-FBGA（27x27） |
| XCS30XL-4VQG100I | 制造商:Xilinx 功能描述:XLXXCS30XL-4VQG100I IC SYSTEM GATE |
| XCS30XL-5BG100C | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS30XL-5BG100I | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS30XL-5BG144C | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
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