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  • 參數(shù)資料
    型號(hào): DA28F160S5-70
    廠商: INTEL CORP
    元件分類: DRAM
    英文描述: 16 Characters x 2 Lines, 5x7 Dot Matrix Character and Cursor
    中文描述: 2M X 8 FLASH 5V PROM, 70 ns, PDSO56
    封裝: 16 X 23.70 MM, SSOP-56
    文件頁數(shù): 26/50頁
    文件大?。?/td> 1220K
    代理商: DA28F160S5-70
    28F160S5, 28F320S5
    E
    26
    ADVANCE INFORMATION
    This two-step command sequence of setup followed
    by execution ensures that block contents are not
    accidentally erased. An invalid Full Chip Erase
    command sequence will result in both Status
    Register bits SR.4 and SR.5 being set to 1. Also,
    reliable full chip erasure can only occur when
    V
    CC
    = V
    CC1/2
    and V
    PP
    = V
    PPH
    .
    In the absence these
    voltages, block contents are protected against
    erasure.
    If full chip erase is attempted while V
    PP
    V
    PPLK
    , SR.3 and SR.5 will be set to 1.
    When WP# =
    V
    IL
    , only unlocked blocks are erased.
    Full chip
    erase cannot be suspended.
    4.8
    Write to Buffer Command
    To program the flash device via the write buffers, a
    Write to Buffer command sequence is initiated. A
    variable number of bytes or words, up to the buffer
    size, can be written into the buffer and programmed
    to the flash device. First, the Write to Buffer setup
    command is issued along with the Block Address.
    At this point, the eXtended Status Register
    information is loaded and XSR.7 reverts to the
    “buffer available” status. If XSR.7 = 0, no write
    buffer is available. To retry, continue monitoring
    XSR.7 by issuing the Write to Buffer setup
    command with the Block Address until XSR.7 = 1.
    When XSR.7 transitions to a “1,” the buffer is ready
    for loading.
    Now a Word/Byte count is issued at an address
    within the block. On the next write, a device start
    address is given along with the write buffer data.
    For maximum programming performance and lower
    power, align the start address at the beginning of a
    Write Buffer boundary. Subsequent writes must
    supply additional device addresses and data,
    depending on the count. All subsequent addresses
    must lie within the start address plus the count.
    After the final buffer data is given, a Write Confirm
    command is issued. This initiates the WSM to begin
    copying the buffer data to the flash memory. If a
    command other than Write Confirm is written to the
    device, an “Invalid Command/Sequence” error will
    be generated and Status Register bits SR.5 and
    SR.4 will be set to “1.” For additional buffer writes,
    issue another Write to Buffer setup command and
    check XSR.7. The write buffers can be loaded while
    the WSM is busy as long as XSR.7 indicates that a
    buffer is available. Refer to Figure 6 for the Write to
    Buffer flowchart.
    If an error occurs while writing, the device will stop
    programming, and Status Register bit SR.4 will be
    set to a “1” to indicate a program failure. Any time a
    media failure occurs during a program or an erase
    (SR.4 or SR.5 is set), the device will not accept any
    more Write to Buffer commands. Additionally, if the
    user attempts to write past an erase block boundary
    with a Write to Buffer command, the device will
    abort programming. This will generate an “Invalid
    Command/Sequence” error and Status Register bits
    SR.5 and SR.4 will be set to “1.” To clear SR.4
    and/or SR.5, issue a Clear Status Register
    command.
    Reliable buffered programming can only occur
    when V
    CC
    = V
    CC1/2
    and V
    PP
    = V
    PPH
    . If programming
    is attempted while V
    V
    , Status Register bits
    SR.4 and SR.5 will be set to “1.” Programming
    attempts with invalid V
    and V
    voltages produce
    spurious results and should not be attempted.
    Finally, successful programming requires that the
    corresponding Block Lock-Bit be cleared, or WP# =
    V
    IH
    . If a buffered write is attempted when the
    corresponding Block Lock-Bit is set and WP# = V
    IL
    ,
    SR.1 and SR.4 will be set to “1.”
    4.9
    Byte/Word Program Command
    Byte/Word programming is executed by a two-cycle
    command sequence. Byte/Word Program setup
    (standard 40H or alternate 10H) is written, followed
    by a second write that specifies the address and
    data (latched on the rising edge of WE#). The WSM
    then takes over, controlling the program and verify
    algorithms internally. After the write sequence is
    written, the device automatically outputs Status
    Register data when read. The CPU can detect the
    completion of the program event by analyzing STS
    in level RY/BY# mode or Status Register bit SR.7.
    When programming is complete, Status Register bit
    SR.4 should be checked. If a programming error is
    detected, the Status Register should be cleared.
    The internal WSM verify only detects errors for “1”s
    that do not successfully program to “0”s. The CUI
    remains in read Status Register mode until it
    receives another command. Refer to Figure 7 for
    the Word/Byte Program flowchart.
    Also, Reliable byte/word programming can only
    occur when V
    CC
    = V
    CC1/2
    and V
    PP
    = V
    PPH
    .
    In the
    absence of this high voltage, contents are protected
    against programming.
    If a byte/word program is
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