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  • 參數資料
    型號: S29PL-J60BFW010
    廠商: Spansion Inc.
    元件分類: FLASH
    英文描述: CMOS 3.0 Volt-only, Simultaneous-Read/Write Flash Memory with Enhanced VersatileIO Control
    中文描述: CMOS 3V電壓供電,同步讀/寫Flash存儲器并有增強VersatileIO控制
    文件頁數: 52/96頁
    文件大?。?/td> 827K
    代理商: S29PL-J60BFW010
    50
    S29PL-J
    S29PL-J_00_A9 September 22, 2006
    D a t a
    S h e e t
    ( A d v a n c e
    I n f o r m a t i o n )
    13.5
    Temporary Sector Unprotect
    This feature allows temporary unprotection of previously protected sectors to change data in-system. The
    Sector Unprotect mode is activated by setting the RESET# pin to V
    ID
    . During this mode, formerly protected
    sectors can be programmed or erased by selecting the sector addresses. Once V
    ID
    is removed from the
    RESET# pin, all the previously protected sectors are protected again.
    Figure 13.2 on page 50
    shows the
    algorithm, and
    Figure 21.1 on page 81
    shows the timing diagrams, for this feature. While PPB lock is set, the
    device cannot enter the Temporary Sector Unprotection Mode.
    Figure 13.2
    Temporary Sector Unprotect Operation
    Notes:
    1. All protected sectors unprotected (If WP#/ACC = V
    IL
    , upper two and lower two sectors will remain protected).
    2. All previously protected sectors are protected once again
    13.6
    Secured Silicon Sector Flash Memory Region
    The Secured Silicon Sector feature provides a Flash memory region that enables permanent part
    identification through an Electronic Serial Number (ESN) The 128-word Secured Silicon sector is divided into
    64 factory-lockable words that can be programmed and locked by the customer. The Secured Silicon sector
    is located at addresses 000000h-00007Fh in both Persistent Protection mode and Password Protection
    mode. Indicator bits DQ6 and DQ7 are used to indicate the factory-locked and customer locked status of the
    part.
    The system accesses the Secured Silicon Sector through a command sequence (see the
    Enter/Exit Secured
    Silicon Sector Command Sequence
    on page 56
    ). After the system has written the Enter Secured Silicon
    Sector command sequence, it may read the Secured Silicon Sector by using the addresses normally
    occupied by the boot sectors. This mode of operation continues until the system issues the Exit Secured
    Silicon Sector command sequence, or until power is removed from the device. Once the Enter SecSi Sector
    Command sequence has been entered, the standard array cannot be accessed until the Exit SecSi Sector
    command has been entered or the device has been reset. On power-up, or following a hardware reset, the
    device reverts to sending commands to the normal address space.
    Note that the ACC function and unlock
    bypass modes are not available when the Secured Silicon Sector is enabled.
    START
    Perform Erase or
    Program Operations
    RESET# = V
    IH
    Temporary Sector
    Unprotect Completed
    (Note 2)
    RESET# = V
    ID
    (Note 1)
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