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MT250QL01GABA3EW70AITES 参数 Datasheet PDF下载

MT250QL01GABA3EW70AITES图片预览
型号: MT250QL01GABA3EW70AITES
PDF下载: 下载PDF文件 查看货源
内容描述: [3V, Multiple I/O, 4KB, 32KB, 64KB, Sector Erase]
分类和应用:
文件页数/大小: 97 页 / 1038 K
品牌: MICRON [ MICRON TECHNOLOGY ]
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256Mb, 3V Multiple I/O Serial Flash Memory  
Nonvolatile and Volatile Sector Lock Bits Security  
Nonvolatile and Volatile Sector Lock Bits Security  
Table 15: Nonvolatile and Volatile Lock Bits  
Bit  
Details  
Nonvolatile Lock Bit  
Volatile Lock Bit  
Description Each sector of memory has one corresponding non-  
volatile lock bit  
Each sector of memory has one corresponding vola-  
tile lock bit; this bit is the sector write lock bit descri-  
bed in the Volatile Lock Bit Register table.  
Function  
When set to 0, locks and protects its corresponding  
When set to 1, locks and protects its corresponding  
memory sector from PROGRAM or ERASE operations. memory sector from PROGRAM or ERASE operations.  
Because this bit is nonvolatile, the sector remains Because this bit is volatile, protection is temporary.  
locked, protection enabled, until the bit is cleared to The sector is unlocked, protection disabled, upon de-  
1.  
vice reset or power-down.  
Settings  
1 = Lock disabled  
0 = Lock enabled  
0 = Lock disabled  
1 = Lock enabled  
Enabling  
The bit is set to 0 by the WRITE NONVOLATILE LOCK The bit is set to 1 by the WRITE VOLATILE LOCK BITS  
protection BITS command, enabling protection for designated  
locked sectors. Programming a sector lock bit re-  
quires the typical byte programming time.  
command, enabling protection for designated locked  
sectors.  
Disabling  
All bits are cleared to 1 by the ERASE NONVOLATILE All bits are set to 0 upon reset or power-down, un-  
protection LOCK BITS command, unlocking and disabling pro-  
tection for all sectors simultaneously. Erasing all sec-  
tor lock bits requires typical sector erase time.  
locking and disabling protection for all sectors.  
Reading  
the bit  
Bits are read by the READ NONVOLATILE LOCK BITS Bits are read by the READ VOLATILE LOCK BITS com-  
command. mand.  
Volatile Lock Bit Security Register  
One volatile lock bit register is associated with each sector of memory. It enables the  
sector to be locked, unlocked, or locked-down with the WRITE VOLATILE LOCK BITS  
command, which executes only when sector lock down (bit 1) is set to 0. Each register  
can be read with the READ VOLATILE LOCK BITS command. This register is compatible  
with and provides the same locking capability as the lock register in the Micron N25Q  
SPI NOR family.  
Table 16: Volatile Lock Bit Register  
Bit Name  
Settings  
Description  
7:2 Reserved  
0
Bit values are 0.  
1
0
Sector  
0 = Lock-down disabled (Default) Volatile bit: Device always powers up with this bit set to 0 so that  
lock down 1 = Lock-down enabled  
sector lock down and sector write lock bits can be set to 1. When  
this bit set to 1, neither of the two volatile lock bits can be written  
to until the next power cycle, hardware, or software reset.  
Sector  
0 = Write lock disabled (Default) Volatile bit: Device always powers up with this bit set to 0 so that  
write lock 1 = Write lock enabled  
PROGRAM and ERASE operations in this sector can be executed  
and sector content modified. When this bit is set to 1, PROGRAM  
and ERASE operations in this sector are not executed.  
CCMTD-1725822587-3368  
mt25q-qljs-L256-ABA-xxT.pdf - Rev. K 07/18 EN  
Micron Technology, Inc. reserves the right to change products or specifications without notice.  
36  
© 2014 Micron Technology, Inc. All rights reserved.  
 
 
 
 
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