- 您現在的位置：買賣IC網 > PDF目錄375015 > XCS40-5VQ100I (Xilinx, Inc.) Spartan and Spartan-XL Families Field Programmable Gate Arrays PDF資料下載
參數資料
| 型號： | XCS40-5VQ100I |
| 廠商： | Xilinx, Inc. |
| 英文描述： | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| 中文描述： | 斯巴達和Spartan - xL的家庭現場可編程門陣列 |
| 文件頁數： | 19/82頁 |
| 文件大小： | 623K |
| 代理商： | XCS40-5VQ100I |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁
Spartan and Spartan-XL Families Field Programmable Gate Arrays
DS060 (v1.6) September 19, 2001
Product Specification
www.xilinx.com
1-800-255-7778
19
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
Table 11
.
Figure 17:
Detail of Spartan/XL Dedicated Carry Logic
0
1
0
1
M
M
0
1
0
1
M
0
1
M
M
0
3
1
M
M
I
G1
G4
F2
F1
F3
C
OUT
C
OUT0
G2
G3
F4
CIN
DS060_17_080400
TO
FUNCTION
GENERATORS
M
M
M
Table 11:
Three-State Buffer Functionality
IN
T
OUT
X
1
Z
IN
0
IN
Figure 18:
3-state Buffers Implement a Multiplexer
D
N
D
C
D
B
D
A
A
B
C
N
Z = (D
A
A) + (D
B
B) + (D
C
C) + (D
N
N)
~100 k
"Weak Keeper"
DS060_18_080400
BUFT
BUFT
BUFT
BUFT
相關PDF資料 |
PDF描述 |
|---|---|
| XCS05XL-3TQ256C | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS05XL-3TQ256I | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS05XL-3TQ280C | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS05XL-3TQ280I | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS05XL-3TQ84C | Spartan and Spartan-XL Families Field Programmable Gate Arrays |
相關代理商/技術參數 |
參數描述 |
|---|---|
| XCS40-5VQ144C | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS40-5VQ144I | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS40-5VQ208C | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS40-5VQ208I | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
| XCS40-5VQ240C | 制造商:XILINX 制造商全稱:XILINX 功能描述:Spartan and Spartan-XL Families Field Programmable Gate Arrays |
發(fā)布緊急采購，3分鐘左右您將得到回復。