參數(shù)資料
型號(hào)： S29PL127J70
廠商： Spansion Inc.
英文描述： CMOS 3.0 Volt-only, Simultaneous Read/Write Flash Memory with Enhanced VersatileIO Control
中文描述： 3.0伏的CMOS只，同步讀/寫(xiě)閃存與增強(qiáng)VersatileIO控制記憶
文件頁(yè)數(shù)： 56/106頁(yè)
文件大?。?/td> 1997K
代理商： S29PL127J70
54
S29PL127J/S29PL129J/S29PL064J/S29PL032J
31107A62 April 7, 2005
P R E L I M I N A R Y
flash device; therefore each password should be different for every flash device.
While programming in the password region, the customer may perform Password
Verify operations.
Once the desired password is programmed in, the customer must then set the
Password Mode Locking Bit. This operation achieves two objectives:
Permanently sets the device to operate using the Password Protection Mode. It is
not possible to reverse this function.
Disables all further commands to the password region. All program, and read op-
erations 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 Protection
method is desired when setting the Password Mode Locking Bit. More importantly,
the user must be sure that the password is correct when the Password Mode
Locking Bit is set. Due to the fact that read operations are disabled, there is no
means to verify what the password is afterwards. If the password is lost after set-
ting the Password Mode Locking Bit, there will be no way to clear the PPB Lock bit.
The Password Mode Locking Bit, once set, prevents reading the 64-bit password
on the DQ bus and further password programming. The Password Mode Locking
Bit is not erasable. Once Password Mode Locking Bit is programmed, the Persis-
tent Sector Protection Locking Bit is disabled from programming, guaranteeing
that no changes to the protection scheme are allowed.
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 Verify commands (see “Password Verify
Command”). The password function works in conjunction with the Password
Mode Locking Bit, which when set, prevents the Password Verify command from
reading the contents of the password on the pins of the device.
Write Protect (WP#)
The Write Protect feature provides a hardware method of protecting the upper
two and lower two sectors without using V
ID
. This function is provided by the WP#
pin and overrides the previously discussed "
High Voltage Sector Protection
" sec-
tion method.
If the system asserts V
IL
on the WP#/ACC pin, the device disables program and
erase functions in the two outermost 4 Kword sectors on both ends of the flash
array independent of whether it was previously protected or unprotected.
If the system asserts V
IH
on the WP#/ACC pin, the device reverts the upper two
and lower two sectors to whether they were last set to be protected or unpro-
tected. That is, sector protection or unprotection for these sectors depends on
whether they were last protected or unprotected using the method described in
the "
High Voltage Sector Protection
" section.
Note that the WP#/ACC pin must not be left floating or unconnected; inconsistent
behavior of the device may result.
Persistent Protection Bit Lock
The Persistent Protection Bit (PPB) Lock is a volatile bit that reflects the state of
the Password Mode Locking Bit after power-up reset. If the Password Mode Lock
Bit is also set after a hardware reset (RESET# asserted) or a power-up reset, the
ONLY means for clearing the PPB Lock Bit in Password Protection Mode is to issue
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
S29PL127J70BAI000 功能描述:閃存 128Mb 3V 70ns 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(lèi)型:Flash 存儲(chǔ)容量:2 MB 結(jié)構(gòu):256 K x 8 定時(shí)類(lèi)型: 接口類(lèi)型:SPI 訪問(wèn)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
S29PL127J70BAI020 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 128MBIT 8MX16 70NS 64FBGA - Trays
S29PL127J70BFI000 制造商:Spansion 功能描述:SPZS29PL127J70BFI000 POWER MOSFET 30 V, 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 128MBIT 8MX16 70NS 80FBGA - Trays
S29PL127J70TAI130 制造商:Spansion 功能描述: 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 128MBIT 8MX16 70NS 56TSOP - Trays
S29PL127J70TFI130 制造商:Spansion 功能描述:FLASH PARALLEL 3V/3.3V 128MBIT 8MX16 70NS 56TSOP - Trays
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