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    參數(shù)資料
    型號: XC4028XL-3HQ304C
    廠商: Xilinx Inc
    文件頁數(shù): 18/68頁
    文件大小: 0K
    描述: IC FPGA C-TEMP 3.3V 3SPD 304HQFP
    產(chǎn)品變化通告: XC4000(XL,XLA,E) Discontinuation 15/Nov/2004
    標(biāo)準(zhǔn)包裝: 12
    系列: XC4000E/X
    LAB/CLB數(shù): 1024
    邏輯元件/單元數(shù): 2432
    RAM 位總計: 32768
    輸入/輸出數(shù): 256
    門數(shù): 28000
    電源電壓: 3 V ~ 3.6 V
    安裝類型: 表面貼裝
    工作溫度: 0°C ~ 85°C
    封裝/外殼: 304-BFQFP 裸露焊盤
    供應(yīng)商設(shè)備封裝: 304-PQFP(40x40)
    R
    May 14, 1999 (Version 1.6)
    6-29
    XC4000E and XC4000X Series Field Programmable Gate Arrays
    6
    Table 14: Routing per CLB in XC4000 Series Devices
    Programmable Switch Matrices
    The horizontal and vertical single- and double-length lines
    intersect at a box called a programmable switch matrix
    (PSM). Each switch matrix consists of programmable pass
    transistors used to establish connections between the lines
    For example, a single-length signal entering on the right
    side of the switch matrix can be routed to a single-length
    line on the top, left, or bottom sides, or any combination
    thereof, if multiple branches are required. Similarly, a dou-
    ble-length signal can be routed to a double-length line on
    any or all of the other three edges of the programmable
    switch matrix.
    Single-Length Lines
    Single-length lines provide the greatest interconnect exi-
    bility and offer fast routing between adjacent blocks. There
    are eight vertical and eight horizontal single-length lines
    associated with each CLB. These lines connect the switch-
    ing matrices that are located in every row and a column of
    CLBs.
    Single-length lines are connected by way of the program-
    mable switch matrices, as shown in Figure 28. Routing
    connectivity is shown in Figure 27.
    Single-length lines incur a delay whenever they go through
    a switching matrix. Therefore, they are not suitable for rout-
    ing signals for long distances. They are normally used to
    conduct signals within a localized area and to provide the
    branching for nets with fanout greater than one.
    x5994
    Quad
    Single
    Double
    Long
    Direct
    Connect
    Long
    CLB
    Long
    Global
    Clock
    Long
    Double Single
    Global
    Clock
    Carry
    Chain
    Direct
    Connect
    Figure 25: High-Level Routing Diagram of XC4000 Series CLB (shaded arrows indicate XC4000X only)
    XC4000E
    XC4000X
    Vertical Horizontal Vertical Horizontal
    Singles
    8
    Doubles
    4
    Quads
    0
    12
    Longlines
    6
    10
    6
    Direct
    Connects
    00
    2
    Globals
    4
    0
    8
    0
    Carry Logic
    2
    0
    1
    0
    Total
    24
    18
    45
    32
    Six Pass Transistors
    Per Switch Matrix
    Interconnect Point
    Singles
    Double
    Singles
    Double
    X6600
    Figure 26: Programmable Switch Matrix (PSM)
    Product Obsolete or Under Obsolescence
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