- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄383705 > OR2T04A-2PS160I (Electronic Theatre Controls, Inc.) Field-Programmable Gate Arrays PDF資料下載
參數(shù)資料
| 型號： | OR2T04A-2PS160I |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | FPGA |
| 英文描述： | Field-Programmable Gate Arrays |
| 中文描述： | 現(xiàn)場可編程門陣列 |
| 文件頁數(shù)： | 20/192頁 |
| 文件大?。?/td> | 3148K |
| 代理商： | OR2T04A-2PS160I |
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頁第19頁當前第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頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁第111頁第112頁第113頁第114頁第115頁第116頁第117頁第118頁第119頁第120頁第121頁第122頁第123頁第124頁第125頁第126頁第127頁第128頁第129頁第130頁第131頁第132頁第133頁第134頁第135頁第136頁第137頁第138頁第139頁第140頁第141頁第142頁第143頁第144頁第145頁第146頁第147頁第148頁第149頁第150頁第151頁第152頁第153頁第154頁第155頁第156頁第157頁第158頁第159頁第160頁第161頁第162頁第163頁第164頁第165頁第166頁第167頁第168頁第169頁第170頁第171頁第172頁第173頁第174頁第175頁第176頁第177頁第178頁第179頁第180頁第181頁第182頁第183頁第184頁第185頁第186頁第187頁第188頁第189頁第190頁第191頁第192頁
20
Lucent Technologies Inc.
Data Sheet
June 1999
ORCA Series 2 FPGAs
Programmable Logic Cells
(continued)
XL Lines.
The long XL lines run vertically and horizon-
tally the height and width of the array, respectively.
There are a total of eight XL lines per PLC: four hori-
zontal (HXL[3:0]) and four vertical (VXL[3:0]). Each
PLC column has four XL lines, and each PLC row has
four XL lines. Each of the XL lines connects to the two
PICs at either end. The Series 2, which consists of a
18 x 18 array of PLCs, contains 72 VXL and 72 HXL
lines. They are intended primarily for global signals
which must travel long distances and require minimum
delay and/or skew, such as clocks.
There are three methods for routing signals onto the XL
lines. In each PLC, there are two long-line drivers: one
for a horizontal XL line, and one for a vertical XL line.
Using the long-line drivers produces the least delay.
The XL lines can also be driven directly by PFU outputs
using the BIDI lines. In the third method, the XL lines
are accessed by the bidirectional buffers, again using
the BIDI lines.
XH Lines
. Four by half (XH) lines run horizontally and
four XH lines run vertically in each row and column in
the array. These lines travel a distance of one-half the
PLC array before being broken in the middle of the
array, where they connect to the interquad block (dis-
cussed later). They also connect at the periphery of the
FPGA to the PICs, like the XL lines. The XH lines do
not twist like XL lines, allowing nibble-wide buses to be
routed easily.
Two of the three methods of routing signals onto the
XL lines can also be used for the XH lines. A special
XH line driver is not supplied for the XH lines.
Clock Lines.
For a very fast and low-skew clock (or
other global signal tree), clock lines run the entire
height and width of the PLC array. There are two hori-
zontal clock lines per PLC row (CKL, CKR) and two
vertical clock lines per PLC column (CKT, CKB). The
source for these clock lines can be any of the four I/O
buffers in the PIC. The horizontal clock lines in a row
(CKL, CKR) are driven by the left and right PICs,
respectively. The vertical clock lines in a column (CKT,
CKB) are driven by the top and bottom PICs, respec-
tively.
The clock lines are designed to be a clock spine. In
each PLC, there is a fast connection available from the
clock line to the long-line driver (described earlier).
With this connection, one of the clock lines in each PLC
can be used to drive one of the four XL lines perpendic-
ular to it, which, in turn, creates a clock tree.
This feature is discussed in detail in the Clock Distribu-
tion Network section.
Minimizing Routing Delay
The CIP is an active element used to connect two lines.
As an active element, it adds significantly to the resis-
tance and capacitance of a net, thus increasing the
net’s delay. The advantage of the X1 line over a X4 line
is routing flexibility. A net from PLC db to PLC cb is eas-
ily routed by using X1 lines. As more CIPs are added to
a net, the delay increases. To increase speed, routes
that are greater than two PLCs away are routed on the
X4 lines because a CIP is located only in every fourth
PLC. A net that spans eight PLCs requires seven X1
lines and six CIPs. Using X4 lines, the same net uses
two lines and one CIP
All routing resources in the PLC can carry 4-bit buses.
In order for data to be used at a destination PLC that is
in data path mode, the data must arrive unscrambled.
For example, in data path operation, the least signifi-
cant bit 0 must arrive at either A[0] or B[0]. If the bus is
to be routed by using either X4 or XL lines (both of
which twist as they propagate), the bus must be placed
on the appropriate lines at the source PLC so that the
data arrives at the destination unscrambled. The
switching lines provide the most efficient means of con-
necting adjacent PLCs. Signals routed with these lines
have minimum propagation delay.
發(fā)布緊急采購，3分鐘左右您將得到回復。