- 您现在的位置：买卖IC网 > PDF目录270895 > S29GL256N80TFIV10 (Spansion Inc.) MirrorBit Flash Family PDF资料下载
参数资料
| 型号： | S29GL256N80TFIV10 |
| 厂商： | Spansion Inc. |
| 英文描述： | MirrorBit Flash Family |
| 中文描述： | MirrorBit闪存系列 |
| 文件页数： | 55/110页 |
| 文件大小： | 2624K |
| 代理商： | S29GL256N80TFIV10 |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页当前第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页
May 13, 2004 27631A4
S29GLxxxN MirrorBitTM Flash Family
49
Ad va nc e
Inform ati o n
Persistent Protection Bit Lock (PPB Lock Bit)
A global volatile bit. When set to the “freeze state”, the PPB bits cannot be
changed. When cleared to the “unfreeze state”, the PPB bits are changeable.
There is only one PPB Lock Bit per device. The PPB Lock Bit is cleared to the “un-
freeze state” after power-up or hardware reset. There is no command sequence
to unlock or “unfreeze” the PPB Lock Bit.
Configuring the PPB Lock Bit to the freeze state requires approximately 100ns.
Reading the PPB Lock Status bit requires the initial access time of the device.
Table 7. Sector Protection Schemes
Table 7 contains all possible combinations of the DYB bit, PPB bit, and PPB Lock
Bit relating to the status of the sector. In summary, if the PPB bit is set, and the
PPB Lock Bit is set, the sector is protected and the protection cannot be removed
until the next power cycle or hardware reset clears the PPB Lock Bit to “unfreeze
state”. If the PPB bit is cleared, the sector can be dynamically locked or unlocked.
The DYB bit then controls whether or not the sector is protected or unprotected.
If the user attempts to program or erase a protected sector, the device ignores
the command and returns to read mode. A program command to a protected sec-
tor enables status polling for approximately 1 s before the device returns to read
mode without having modified the contents of the protected sector. An erase
command to a protected sector enables status polling for approximately 50 s
after which the device returns to read mode without having erased the protected
sector. The programming of the DYB bit, PPB bit, and PPB Lock Bit for a given sec-
tor can be verified by writing a DYB Status Read, PPB Status Read, and PPB Lock
Status Read commands to the device.
The Autoselect Sector Protection Verification outputs the OR function of the DYB
bit and PPB bit per sector basis. When the OR function of the DYB bit and PPB bit
is a 1, the sector is either protected by DYB or PPB or both. When the OR function
of the DYB bit and PPB bit is a 0, the sector is unprotected through both the DYB
and PPB.
Persistent Protection Mode Lock Bit
Like the Password Protection Mode Lock Bit, a Persistent Protection Mode Lock Bit
exists to guarantee that the device remain in software sector protection. Once
programmed, the Persistent Protection Mode Lock Bit prevents programming of
Protection States
Sector State
DYB Bit
PPB Bit
PPB Lock Bit
Unprotect
Unfreeze
Unprotected – PPB and DYB are changeable
Unprotect
Freeze
Unprotected – PPB not changeable, DYB is
changeable
Unprotect
Protect
Unfreeze
Protected – PPB and DYB are changeable
Unprotect
Protect
Freeze
Protected – PPB not changeable, DYB is changeable
Protect
Unprotect
Unfreeze
Protected – PPB and DYB are changeable
Protect
Unprotect
Freeze
Protected – PPB not changeable, DYB is changeable
Protect
Unfreeze
Protected – PPB and DYB are changeable
Protect
Freeze
Protected – PPB not changeable, DYB is changeable
相关PDF资料 |
PDF描述 |
|---|---|
| S29GL256N90TFIV10 | MirrorBit Flash Family |
| S29GL256N10TFIV10 | MirrorBit Flash Family |
| S29GL256N80FFIV10 | MirrorBit Flash Family |
| S29AL008D55TFNR11 | SSR OCMOS FET 350MA NO 8-DIP |
| S29AL008D70TFNR11 | 8 Megabit (1 M x 8-Bit/512 K x 16-Bit) CMOS 3.0 Volt-only Boot Sector Flash Memory |
相关代理商/技术参数 |
参数描述 |
|---|---|
| S29GL256N90FFIR10 | 制造商:Spansion 功能描述:Flash Mem Parallel 3.3V 256M-Bit 32M x 8/16M x 16 90ns 64-Pin Fortified BGA Tray |
| S29GL256N90FFIR22 | 制造商:Spansion 功能描述: |
| S29GL256N90TFIR10 | 制造商:Spansion 功能描述:NOR Flash Parallel 3.3V 256Mbit 32M/16M x 8bit/16bit 90ns 56-Pin TSOP Tray 制造商:Spansion 功能描述:Flash - NOR IC |
| S29GL256N90TFIR2 | 制造商:Spansion 功能描述: |
| S29GL256N90TFIR20 | 制造商:Spansion 功能描述:Flash Mem Parallel 3.3V 256M-Bit 32M x 8/16M x 16 90ns 56-Pin TSOP Tray 制造商:Spansion 功能描述:Flash - NOR IC |
发布紧急采购，3分钟左右您将得到回复。