- 您现在的位置：买卖IC网 > PDF目录299576 > OR3T55-4BA352 FPGA, 324 CLBS, 40000 GATES, 80 MHz, PBGA352 PDF资料下载
参数资料
| 型号： | OR3T55-4BA352 |
| 元件分类： | FPGA |
| 英文描述： | FPGA, 324 CLBS, 40000 GATES, 80 MHz, PBGA352 |
| 封装： | PLASTIC, BGA-352 |
| 文件页数： | 155/210页 |
| 文件大小： | 2138K |
| 代理商： | OR3T55-4BA352 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页第151页第152页第153页第154页当前第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页第181页第182页第183页第184页第185页第186页第187页第188页第189页第190页第191页第192页第193页第194页第195页第196页第197页第198页第199页第200页第201页第202页第203页第204页第205页第206页第207页第208页第209页第210页
Lucent Technologies Inc.
49
Preliminary Data Sheet, Rev. 1
September 1998
ORCA Series 3 FPGAs
Clock Distribution Network (continued)
Clock Sources to the PLC Array
The source of a clock that is globally available to the
PLC array can be from any user I/O pad, any of the
ExpressCLK
pads, or an internally generated source.
System Clock
As described in the Programmable Input/Output Cells
section, PICs are grouped in adjacent pairs. Any one of
the eight pads in a PIC pair can drive a clock spine in a
row or column. For PIC pairs on the top of the chip, the
column associated with the left PIC has the clock
spine, for pairs on the bottom, the right PIC column has
the spine. The top PIC of the pair sources the spine
from the left side of the array, and the bottom PIC of the
pair sources the spine from the right side of the array.
Clock delay and skew are minimized by having a single
clock buffer per pair of PICs. The clock spine for each
pair can also be driven by one of the four PIC switching
segments (pSW) in each PIC of the pair. This allows a
signal generated in the PLC array to be routed onto the
global clock spine network. The system clock output of
the programmable clock manager (PCM) may also be
routed to the global system clock spines via the pSW
segments. Figure 33 shows the clock spine multiplex-
ing structure for a pair of PICs on the top of the array.
Fast Clock
The Fast Clock spines are sourced to the PLC array
from each side of the device by the ExpressCLK pads
via the CLKCNTRL function block (described in the
Special Function Blocks section). The ExpressCLK and
Fast Clock source from the pads is shown in Figure 34
and will be described further in the ExpressCLK Inputs
subsection.
Figure 33. PIC System Clock Spine Generation
Clocks in the PICs
Because the Series 3 FPGAs have latches and FFs in
the I/Os, it is necessary to have clock signal distribution
to the PIOs as well as in the PLC array. The system
clock, the Fast Clock, and the ExpressCLK are avail-
able for PIO clocking.
PIC System Clock
There are five local system clock lines in each PIC.
Much like the sources for a clock in the PFU, two of the
local PIC clocks are generated within the PIC from long
lines. One is generated from the set of ten PIC long
lines (pxL) that runs parallel to the PICs on a side, and
the other is generated from the set of ten long lines (xL)
from the PLC array that terminate in the PIC. Another
local PIC system clock route comes from the set of ten
xL lines in the adjacent PLC that is parallel to the side
of the array on which the PIC resides. The fourth local
PIC system clock route comes from the set of ten long
lines (xL) from the PLC array that terminate in the adja-
cent PIC that is not part of the same PIC pair. Much like
the E1 signals in the PLCs that are used to distribute a
local clock to the PFU source, the fifth local clock line in
each PIC comes from local PSW signals. This clock
signal for each PIC is shown in Figure 33. One of these
five local PIC system clocks is selected for the system
clock signal in the PIO. It is used as the PIO system
clock for both input and output clocking as selected
within the PIO. All PIOs in a PIC share the same sys-
tem clock.
PIC ExpressCLK
The ExpressCLK signal used at the PIC latches/FFs
comes from the CLKCNTRL function block that resides
in the middle of the side on which the PIC resides. The
ExpressCLK
output from the CLKCNTRL block is
divided into two signals, although the same Express-
CLK
source from the pads or the programmable clock
manager (PCM) feeds both signals. One ExpressCLK
signal goes to the PICs on the right of (above) the
CLKCNTRL block, and the other ExpressCLK signal
goes to the PICs on the left of (below) the CLKCNTRL
block on that side.
PAD A
PAD B
PAD C
PAD D
PSW[4]
PSW[5]
PSW[6]
PSW[7]
PA
D
A
PA
D
B
PA
D
C
PA
D
PS
W
[4
]
PS
W
[5
]
PS
W
[6
]
PS
W
[7
]
TO LOCAL CLOCKS
SPINE
5-5800(F)
相关PDF资料 |
PDF描述 |
|---|---|
| OR3T80-4BA352I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA352 |
| OR3T80-4BA352 | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA352 |
| OR3T125-4BC432I | FPGA, 784 CLBS, 92000 GATES, 80 MHz, PBGA432 |
| OR3T80-4BC432I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA432 |
| OR3C80-4BC600I | FPGA, 484 CLBS, 58000 GATES, 80 MHz, PBGA600 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| OR3T55-4PS208I | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field Programmable Gate Array (FPGA) |
| OR3T55-4PS240I | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Field Programmable Gate Array (FPGA) |
| OR3T55-5BA256 | 制造商:AGERE 制造商全称:AGERE 功能描述:3C and 3T Field-Programmable Gate Arrays |
| OR3T55-5BA256I | 制造商:AGERE 制造商全称:AGERE 功能描述:3C and 3T Field-Programmable Gate Arrays |
| OR3T55-5BA352 | 制造商:AGERE 制造商全称:AGERE 功能描述:3C and 3T Field-Programmable Gate Arrays |
发布紧急采购，3分钟左右您将得到回复。