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EN25D16-100HI 参数 Datasheet PDF下载

EN25D16-100HI图片预览
型号: EN25D16-100HI
PDF下载: 下载PDF文件 查看货源
内容描述: 16兆位串行闪存 [16 Megabit Serial Flash Memory]
分类和应用: 闪存
文件页数/大小: 37 页 / 483 K
品牌: EON [ EON SILICON SOLUTION INC. ]
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EN25D16  
Active Power, Stand-by Power and Deep Power-Down Modes  
When Chip Select (CS#) is Low, the device is enabled, and in the Active Power mode. When Chip  
Select (CS#) is High, the device is disabled, but could remain in the Active Power mode until all  
internal cycles have completed (Program, Erase, Write Status Register). The device then goes into  
the Stand-by Power mode. The device consumption drops to ICC1  
.
The Deep Power-down mode is entered when the specific instruction (the Enter Deep Power-down  
Mode (DP) instruction) is executed. The device consumption drops further to ICC2. The device re-  
mains in this mode until another specific instruction (the Release from Deep Power-down Mode and  
Read Device ID (RDI) instruction) is executed.  
All other instructions are ignored while the device is in the Deep Power-down mode. This can be  
used as an extra software protection mechanism, when the device is not in active use, to protect the  
device from inadvertent Write, Program or Erase instructions.  
Status Register. The Status Register contains a number of status and control bits that can be read  
or set (as appropriate) by specific instructions.  
WIP bit. The Write In Progress (WIP) bit indicates whether the memory is busy with a Write Status  
Register, Program or Erase cycle.  
WEL bit. The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch.  
BP2, BP1, BP0 bits. The Block Protect (BP2, BP1, BP0) bits are non-volatile. They define the size  
of the area to be software protected against Program and Erase instructions.  
SRP bit / OTP_LOCK bit The Status Register Protect (SRP) bit is operated in conjunction with the  
Write Protect (WP#) signal. The Status Register Protect (SRP) bit and Write Protect (WP#) signal  
allow the device to be put in the Hardware Protected mode. In this mode, the non-volatile bits of the  
Status Register (SRP, BP2, BP1, BP0) become read-only bits.  
In OTP mode, this bit is served as OTP_LOCK bit, user can read/program/erase OTP sector as  
normal sector while OTP_LOCK value is equal 0, after OTP_LOCK is programmed with 1 by WRSR  
command, the OTP sector is protected from program and erase operation. The OTP_LOCK bit can  
only be programmed once.  
Note : In OTP mode, the WRSR command will ignore any input data and program OTP_LOCK bit to  
1, user must clear the protect bits before enter OTP mode and program the OTP code, then execute  
WRSR command to lock the OTP sector before leaving OTP mode.  
Write Protection  
Applications that use non-volatile memory must take into consideration the possibility of noise and  
other adverse system conditions that may compromise data integrity. To address this concern the  
EN25D16 provides the following data protection mechanisms:  
z
Power-On Reset and an internal timer (t  
) can provide protection against inadvertent  
PUW  
changes while the power supply is outside the operating specification.  
Program, Erase and Write Status Register instructions are checked that they consist of a  
number of clock pulses that is a multiple of eight, before they are accepted for execution.  
All instructions that modify data must be preceded by a Write Enable (WREN) instruction to set  
the Write Enable Latch (WEL) bit . This bit is returned to its reset state by the following events:  
– Power-up  
z
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– Write Disable (WRDI) instruction completion or Write Status Register (WRSR) instruction  
completion or Page Program (PP) instruction completion or Sector Erase (SE)instruction  
completion or Block Erase (BE) instruction completion or Chip Erase (CE) instruction  
completion  
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The Block Protect (BP2, BP1, BP0) bits allow part of the memory to be configured as read-only.  
This is the Software Protected Mode (SPM).  
The Write Protect (WP#) signal allows the Block Protect (BP2, BP1, BP0) bits and Status  
Register Protect (SRP) bit to be protected. This is the Hardware Protected Mode (HPM).  
This Data Sheet may be revised by subsequent versions  
or modifications due to changes in technical specifications.  
©2004 Eon Silicon Solution, Inc., www.essi.com.tw  
8
Rev. B, Issue Date: 2008/06/23  
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