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    參數(shù)資料
    型號: LPC2923FBD100
    廠商: NXP SEMICONDUCTORS
    元件分類: 微控制器/微處理器
    英文描述: ARM9 microcontroller with CAN, LIN, and USB
    中文描述: 32-BIT, FLASH, 125 MHz, RISC MICROCONTROLLER, PQFP100
    封裝: 14 X 14 MM, 1.40 MM HEIGHT, PLASTIC, MS-026, SOT407-1, LQFP-100
    文件頁數(shù): 19/84頁
    文件大?。?/td> 551K
    代理商: LPC2923FBD100
    LPC2921_23_25_3
    All information provided in this document is subject to legal disclaimers.
    NXP B.V. 2010. All rights reserved.
    Product data sheet
    Rev. 03 — 14 April 2010
    19 of 84
    NXP Semiconductors
    LPC2921/2923/2925
    ARM9 microcontroller with CAN, LIN, and USB
    The index sector is a special sector in which the JTAG access protection and sector
    security are located. The address space becomes visible by setting the FS_ISS bit and
    overlaps the regular flash sector’s address space.
    Note that the index sector, once programmed, cannot be erased. Any flash operation must
    be executed out of SRAM (internal or external).
    6.8.3
    Flash bridge wait-states
    To eliminate the delay associated with synchronizing flash-read data, a predefined
    number of wait-states must be programmed. These depend on flash memory response
    time and system clock period. The minimum wait-states value can be calculated with the
    following formulas:
    Synchronous reading:
    (1)
    Asynchronous reading:
    (2)
    Remark:
    If the programmed number of wait-states is more than three, flash-data reading
    cannot be performed at full speed (i.e. with zero wait-states at the AHB bus) if speculative
    reading is active.
    6.8.4
    Pin description
    The flash memory controller has no external pins. However, the flash can be programmed
    via the JTAG pins, see
    Section 6.6.3
    .
    6.8.5
    Clock description
    The flash memory controller is clocked by CLK_SYS_FMC, see
    Section 6.7.2
    .
    16
    17
    18
    0
    1
    2
    3
    4
    5
    6
    8
    8
    8
    64
    64
    64
    64
    64
    64
    64
    0x2000 A000
    0x2000 C000
    0x2000 E000
    0x2001 0000
    0x2002 0000
    0x2003 0000
    0x2004 0000
    0x2005 0000
    0x2006 0000
    0x2007 0000
    yes
    yes
    yes
    yes
    no
    no
    no
    no
    no
    no
    yes
    yes
    yes
    yes
    yes
    yes
    no
    no
    no
    no
    yes
    yes
    yes
    yes
    yes
    yes
    yes
    yes
    yes
    yes
    Table 10.
    Flash memory
    sector number
    Flash sector overview
    …continued
    Sector size (kB)
    Flash memory
    address
    LPC2921
    LPC2923
    LPC2925
    WST
    t
    t
    t
    tclk sys
    )
    )
    ------------------
    >
    1
    WST
    t
    t
    tclk sys
    )
    )
    ---------------------
    >
    1
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