欢迎访问ic37.com |
会员登录 免费注册
发布采购

X24165SM 参数 Datasheet PDF下载

X24165SM图片预览
型号: X24165SM
PDF下载: 下载PDF文件 查看货源
内容描述: 先进的2线串行E2PROM带座LockTM保护 [Advanced 2-Wire Serial E2PROM with Block LockTM Protection]
分类和应用: 内存集成电路光电二极管可编程只读存储器电动程控只读存储器电可擦编程只读存储器时钟
文件页数/大小: 17 页 / 291 K
品牌: ICMIC [ IC MICROSYSTEMS ]
 浏览型号X24165SM的Datasheet PDF文件第6页浏览型号X24165SM的Datasheet PDF文件第7页浏览型号X24165SM的Datasheet PDF文件第8页浏览型号X24165SM的Datasheet PDF文件第9页浏览型号X24165SM的Datasheet PDF文件第11页浏览型号X24165SM的Datasheet PDF文件第12页浏览型号X24165SM的Datasheet PDF文件第13页浏览型号X24165SM的Datasheet PDF文件第14页  
X24165  
Block Protect Bits  
The Block Protect Bits BP0 and BP1 determine which  
blocks of the memory are write-protected:  
Programmable Hardware Write Protect  
The Write Protect (WP) pin and the Write Protect Enable  
(WPEN) bit in the Write Protect Register  
control the programmable hardware write protect feature.  
Hardware write protection is enabled when the  
Table 1. Block Protect Bits  
WP pin and the WPEN bit are both HIGH, and  
disabled when either the WP pin is LOW or the WPEN  
Protected  
BP1 BP0 Addresses  
bit is LOW. When the chip is hardware write-protected,  
non-volatile writes are disabled to the Write Protect  
0
0
1
0
1
0
None  
Register, including the BP bits and the WPEN bit itself, as  
well as to block-protected sections in the memory  
600h–7FFh  
400h–7FFh  
Upper 1/4  
Upper 1/2  
array. Only the sections of the memory array that are not  
block-protected can be written. Note that since the  
Full Array (WPR  
not included)  
1
1
0000h–7FFh  
WPEN bit is write-protected, it cannot be changed back  
to a LOW state, and write protection is disabled  
6551 FRM T02  
as long as the the WP pin is held HIGH. Table 2  
defines the write protection status for each state of  
WPEN and WP.  
Table 2. Write Protect Status Table  
Memory Array  
Memory Array  
(Block Protected)  
(Not Block  
Protected)  
WP  
0
WPEN  
BP Bits  
Writable  
Writable  
Protected  
WPEN Bit  
Writable  
X
0
1
Writable  
Writable  
Writable  
Protected  
X
Protected  
Writable  
1
Protected  
Protected  
6551 FRM T03  
10