參數(shù)資料
    型號(hào): STPCE1DDBI
    英文描述: Microprocessor
    中文描述: 微處理器
    文件頁(yè)數(shù): 8/87頁(yè)
    文件大?。?/td> 1356K
    代理商: STPCE1DDBI
    GENERAL DESCRIPTION
    8/87
    Release 1.3 - January 29, 2002
    This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.
    1.4. CLOCK TREE
    The STPC Elite integrates many features and
    generates all its clocks from a single 14MHz
    oscillator. This results in multiple clock domains as
    described in
    Figure 1-2
    .
    The speed of the PLLs is either fixed (DEVCLK),
    either programmable by strap option (HCLK)
    either programmable by software (GPCLK,
    MCLK). When in synchronized mode, MCLK
    speed is fixed to HCLKO speed and HCLKI is
    generated from MCLKI.
    Figure 1-2. STPC Elite clock architecture
    IPC
    SDRAM controller
    North Bridge
    14.31818 MHz
    XTALO
    XTALI
    OSC14M
    (14MHz)
    ISACLK
    1/4
    GPCLK
    PLL
    GPCLK
    1/2
    HCLK
    PLL
    PCICLKI
    PCICLKO
    South Bridge
    1/2
    1/3
    HCLK
    MCLK
    PLL
    MCLKI
    MCLKO
    CPU
    x1
    x2
    Local Bus
    Host
    ISA
    HCLKI
    HCLKO
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