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    參數(shù)資料
    型號: XC3S250E-4CPG132C
    廠商: Xilinx Inc
    文件頁數(shù): 11/227頁
    文件大?。?/td> 0K
    描述: IC SPARTAN-3E FPGA 250K 132CSBGA
    產(chǎn)品培訓(xùn)模塊: FPGAs Spartan3
    標(biāo)準(zhǔn)包裝: 360
    系列: Spartan®-3E
    LAB/CLB數(shù): 612
    邏輯元件/單元數(shù): 5508
    RAM 位總計(jì): 221184
    輸入/輸出數(shù): 92
    門數(shù): 250000
    電源電壓: 1.14 V ~ 1.26 V
    安裝類型: 表面貼裝
    工作溫度: 0°C ~ 85°C
    封裝/外殼: 132-TFBGA,CSPBGA
    供應(yīng)商設(shè)備封裝: 132-CSPBGA(8x8)
    其它名稱: 122-1518
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    Spartan-3E FPGA Family: Functional Description
    DS312 (v4.1) July 19, 2013
    Product Specification
    108
    Bitstream Generator (BitGen) Options
    For additional information, refer to the “Configuration
    Bitstream Generator (BitGen) Settings” chapter in UG332.
    Various Spartan-3E FPGA functions are controlled by
    specific bits in the configuration bitstream image. These
    values are specified when creating the bitstream image with
    the Bitstream Generator (BitGen) software.
    Table 69 provides a list of all BitGen options for Spartan-3E
    FPGAs.
    Table 69: Spartan-3E FPGA Bitstream Generator (BitGen) Options
    Option Name
    Pins/Function
    Affected
    Values
    (default)
    Description
    ConfigRate
    CCLK,
    Configuration
    1, 3, 6,
    12, 25, 50
    Sets the approximate frequency, in MHz, of the internal oscillator using for Master
    Serial, SPI, and BPI configuration modes. The internal oscillator powers up at its lowest
    frequency, and the new setting is loaded as part of the configuration bitstream. The
    software default value is 1 (~1.5 MHz) starting with ISE 8.1, Service Pack 1.
    StartupClk
    Configuration,
    Startup
    Cclk
    Default. The CCLK signal (internally or externally generated) controls the startup
    sequence when the FPGA transitions from configuration mode to the user mode. See
    UserClk
    A clock signal from within the FPGA application controls the startup sequence when the
    FPGA transitions from configuration mode to the user mode. See Start-Up. The FPGA
    application supplies the user clock on the CLK pin on the STARTUP_SPARTAN3E
    primitive.
    Jtag
    The JTAG TCK input controls the startup sequence when the FPGA transitions from the
    configuration mode to the user mode. See Start-Up.
    UnusedPin
    Unused I/O
    Pins
    Pulldown
    Default. All unused I/O pins and input-only pins have a pull-down resistor to GND.
    Pullup
    All unused I/O pins and input-only pins have a pull-up resistor to the VCCO_# supply
    for its associated I/O bank.
    Pullnone
    All unused I/O pins and input-only pins are left floating (Hi-Z, high-impedance,
    three-state). Use external pull-up or pull-down resistors or logic to apply a valid signal
    level.
    DONE_cycle
    DONE pin,
    Configuration
    Startup
    1, 2, 3, 4,
    5, 6
    Selects the Configuration Startup phase that activates the FPGA’s DONE pin. See
    GWE_cycle
    All flip-flops,
    LUT RAMs, and
    SRL16 shift
    registers, Block
    RAM,
    Configuration
    Startup
    1, 2, 3, 4,
    5, 6
    Selects the Configuration Startup phase that asserts the internal write-enable signal to
    all flip-flops, LUT RAMs and shift registers (SRL16). It also enables block RAM read and
    write operations. See Start-Up.
    Done
    Waits for the DONE pin input to go High before asserting the internal write-enable signal
    to all flip-flops, LUT RAMs and shift registers (SRL16). Block RAM read and write
    operations are enabled at this time.
    Keep
    Retains the current GWE_cycle setting for partial reconfiguration applications.
    GTS_cycle
    All I/O pins,
    Configuration
    1, 2, 3, 4,
    5, 6
    Selects the Configuration Startup phase that releases the internal three-state control,
    holding all I/O buffers in high-impedance (Hi-Z). Output buffers actively drive, if so
    configured, after this point. See Start-Up.
    Done
    Waits for the DONE pin input to go High before releasing the internal three-state control,
    holding all I/O buffers in high-impedance (Hi-Z). Output buffers actively drive, if so
    configured, after this point.
    Keep
    Retains the current GTS_cycle setting for partial reconfiguration applications.
    LCK_cycle
    DCMs,
    Configuration
    Startup
    NoWait
    The FPGA does not wait for selected DCMs to lock before completing configuration.
    0, 1, 2, 3,
    4, 5, 6
    If one or more DCMs in the design have the STARTUP_WAIT attribute set to TRUE, the
    FPGA waits for such DCMs to acquire their respective input clock and assert their
    LOCKED output. This setting selects the Configuration Startup phase where the FPGA
    waits for the DCMs to lock.
    DonePin
    DONE pin
    Pullup
    Internally connects a pull-up resistor between DONE pin and VCCAUX. An external
    330
    Ω pull-up resistor to VCCAUX is still recommended.
    Pullnone
    No internal pull-up resistor on DONE pin. An external 330
    Ω pull-up resistor to VCCAUX
    is required.
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