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              • 您現(xiàn)在的位置:買賣IC網(wǎng) > PDF目錄385798 > S29GL064N11TFI070 (Spansion Inc.) 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology PDF資料下載
              參數(shù)資料
              型號(hào): S29GL064N11TFI070
              廠商: Spansion Inc.
              英文描述: 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology
              中文描述: 64兆,32兆位3.0伏只頁面模式閃存具有110納米MirrorBit工藝技術(shù)
              文件頁數(shù): 34/79頁
              文件大?。?/td> 2191K
              代理商: S29GL064N11TFI070
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              34
              S29GL-N MirrorBit
              Flash Family
              S29GL-N_01_09 November 16, 2007
              D a t a
              S h e e t
              8.14
              Password Sector Protection
              The Password Sector Protection method allows an even higher level of security than the Persistent Sector
              Protection method. There are two main differences between the Persistent Sector Protection and the
              Password Sector Protection methods:
              When the device is first powered on, or comes out of a reset cycle, the PPB Lock Bit is set to the locked
              state, or the freeze state, rather than cleared to the unlocked state, or the unfreeze state.
              The only means to clear and unfreeze the PPB Lock Bit is by writing a unique 64-bit Password to the
              device.
              The Password Sector Protection method is otherwise identical to the Persistent Sector Protection method.
              A 64-bit password is the only additional tool utilized in this method.
              The password is stored in a one-time programmable (OTP) region outside of the flash memory. Once the
              Password Protection Mode Lock Bit is set, the password is permanently set with no means to read, program,
              or erase it. The password is used to clear and unfreeze the PPB Lock Bit. The Password Unlock command
              must be written to the flash, along with a password. The flash device internally compares the given password
              with the pre-programmed password. If they match, the PPB Lock Bit is cleared to the
              unfreezed state
              , and the
              PPB bits can be altered. If they do not match, the flash device does nothing. There is a built-in 2 μs delay for
              each
              password check
              after the valid 64-bit password is entered for the PPB Lock Bit to be cleared to the
              “unfreezed state”. This delay is intended to thwart any efforts to run a program that tries all possible
              combinations in order to crack the password.
              8.15
              Password and Password Protection Mode Lock Bit
              In order to select the Password Sector Protection method, the customer must first program the password.
              The factory recommends that the password be somehow correlated to the unique Electronic Serial Number
              (ESN) of the particular flash device. Each ESN is different for every flash device; therefore each password
              should be different for every flash device. While programming in the password region, the customer may
              perform Password Read operations. Once the desired password is programmed in, the customer must then
              set the Password Protection Mode Lock Bit. This operation achieves two objectives:
              1. It permanently sets the device to operate using the Password Protection Mode. It is not possible to
              reverse this function.
              2. It also disables all further commands to the password region. All program, and read operations are
              ignored.
              Both of these objectives are important, and if not carefully considered, may lead to unrecoverable errors. The
              user must be sure that the Password Sector Protection method is desired when programming the Password
              Protection Mode Lock Bit. More importantly, the user must be sure that the password is correct when the
              Password Protection Mode Lock Bit is programmed. Due to the fact that read operations are disabled, there is
              no means to read what the password is afterwards. If the password is lost after programming the Password
              Protection Mode Lock Bit, there is no way to clear and unfreeze the PPB Lock Bit. The Password Protection
              Mode Lock Bit, once programmed, prevents reading the 64-bit password on the DQ bus and further password
              programming. The Password Protection Mode Lock Bit is not erasable. Once Password Protection Mode
              Lock Bit is programmed, the Persistent Protection Mode Lock Bit is disabled from programming, guaranteeing
              that no changes to the protection scheme are allowed.
              8.16
              64-bit Password
              The 64-bit Password is located in its own memory space and is accessible through the use of the Password
              Program and Password Read commands. The password function works in conjunction with the Password
              Protection Mode Lock Bit, which when programmed, prevents the Password Read command from reading
              the contents of the password on the pins of the device.
              相關(guān)PDF資料
              PDF描述
              S29GL064N11TFI072 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology
              S29GL064N11TFIV10 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology
              S29GL064N11TFIV12 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology
              S29GL064N11TFIV20 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology
              S29GL064N11TFIV22 64 Megabit, 32 Megabit 3.0-Volt only Page Mode Flash Memory Featuring 110 nm MirrorBit Process Technology
              相關(guān)代理商/技術(shù)參數(shù)
              參數(shù)描述
              S29GL064N11TFIV10 功能描述:閃存 64Mb 3V 110ns Parallel NOR 閃存 RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問時(shí)間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel
              S29GL064N11TFIV13 制造商:Spansion 功能描述:FLASH MEMORY - Trays
              S29GL064N11TFIV20 功能描述:閃存 64MB 2.7-3.6V 110ns Parallel NOR 閃存 RoHS:否 制造商:ON Semiconductor 數(shù)據(jù)總線寬度:1 bit 存儲(chǔ)類型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類型: 接口類型:SPI 訪問時(shí)間: 電源電壓-最大:3.6 V 電源電壓-最小:2.3 V 最大工作電流:15 mA 工作溫度:- 40 C to + 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體: 封裝:Reel
              S29GL064N11TFIV73 制造商:Spansion 功能描述:64M (4MX16) 3V REG, MIRRORBIT, FBGA63, IND - Tape and Reel
              S29GL064N11WEI039 制造商:Spansion 功能描述:S29GL064N KNOWN GOOD DIE IN WAFER FORM, 64 MBIT, - Trays
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