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參數(shù)資料
| 型號： | XC3042A-7TQ144C |
| 廠商： | XILINX INC |
| 元件分類： | FPGA |
| 英文描述： | Field Programmable Gate Arrays (XC3000A/L, XC3100A/L) |
| 中文描述： | FPGA, 144 CLBS, 2000 GATES, 113 MHz, PQFP144 |
| 封裝： | PLASTIC, TQFP-144 |
| 文件頁數(shù)： | 15/50頁 |
| 文件大?。?/td> | 474K |
| 代理商： | XC3042A-7TQ144C |
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2-117
option is available to assure symmetry. The oscillator
circuit becomes active early in the configuration process to
allow the oscillator to stabilize. Actual internal connection
is delayed until completion of configuration. In Figure 17
the feedback resistor R1, between the output and input,
biases the amplifier at threshold. The inversion of the
amplifier, together with the R-C networks and an AT-cut
series resonant crystal, produce the 360-degree phase
shift of the Pierce oscillator. A series resistor R2 may be
included to add to the amplifier output impedance when
needed for phase-shift control, crystal resistance match-
ing, or to limit the amplifier input swing to control clipping
at large amplitudes. Excess feedback voltage may be
corrected by the ratio of C2/C1. The amplifier is designed
to be used from 1 MHz to about one-half the specified CLB
toggle frequency. Use at frequencies below 1 MHz may
require individual characterization with respect to a series
of conflicting levels on a common line. Each horizontal
Longline is also driven by a weak keeper circuit that
prevents undefined floating levels by maintaining the pre-
vious logic level when the line is not driven by an active
buffer or a pull-up resistor. Figure 16 shows 3-state buff-
ers, Longlines and pull-up resistors.
Crystal Oscillator
Figure 16 also shows the location of an internal high speed
inverting amplifier which may be used to implement an on-
chip crystal oscillator. It is associated with the auxiliary
buffer in the lower right corner of the die. When the
oscillator is configured by MakeBits and connected as a
signal source, two special user IOBs are also configured to
connect the oscillator amplifier with external crystal oscil-
lator components as shown in Figure 17. A divide by two
X1245
Figure 16
.
XACT Development System
. An extra large view of possible interconnections in the lower right corner of the XC3020.
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| XC3164A-3PQ160C | Field Programmable Gate Arrays (XC3000A/L, XC3100A/L) |
| XC3164A-3PQ160I | Field Programmable Gate Arrays (XC3000A/L, XC3100A/L) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| XC3042A-7TQ144I | 制造商:XILINX 制造商全稱:XILINX 功能描述:Field Programmable Gate Arrays (XC3000A/L, XC3100A/L) |
| XC3042A-7VQ100C | 功能描述:IC FIELD PROG GATE ARRAY 100 PIN RoHS:否 類別:集成電路 (IC) >> 嵌入式 - FPGA（現(xiàn)場可編程門陣列） 系列:XC3000A/L 產(chǎn)品變化通告:XC4000(E,L) Discontinuation 01/April/2002 標準包裝:24 系列:XC4000E/X LAB/CLB數(shù):100 邏輯元件/單元數(shù):238 RAM 位總計:3200 輸入/輸出數(shù):80 門數(shù):3000 電源電壓:4.5 V ~ 5.5 V 安裝類型:表面貼裝 工作溫度:-40°C ~ 100°C 封裝/外殼:120-BCBGA 供應(yīng)商設(shè)備封裝:120-CPGA（34.55x34.55） |
| XC3042A-7VQ100I | 制造商:Xilinx 功能描述: |
| XC3042B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| XC3042L | 制造商:XILINX 制造商全稱:XILINX 功能描述:Field Programmable Gate Arrays |
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