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參數(shù)資料
| 型號： | X24165SM |
| 英文描述： | Advanced 2-Wire Serial E2PROM with Block Lock Protection |
| 中文描述： | 先進的2線串行E2PROM區(qū)塊可鎖定的保護 |
| 文件頁數(shù)： | 10/17頁 |
| 文件大?。?/td> | 79K |
| 代理商： | X24165SM |
X24165
10
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
WP pin and the WPEN bit are both HIGH, and
disabled when either the WP pin is LOW or the WPEN
bit is LOW. When the chip is hardware write-protected,
nonvolatile writes are disabled to the Write Protect
Register, including the BP bits and the WPEN bit itself,
as well as to block-protected sections in the memory
array. Only the sections of the memory array that are
not block-protected can be written. Note that since the
WPEN bit is write-protected, it cannot be changed
back to a LOW state, and write protection is disabled
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 1. Block Protect Bits
6551 FRM T02
BP1
0
0
1
BP0
0
1
0
Protected
Addresses
None
600h–7FFh
400h–7FFh
Upper 1/4
Upper 1/2
Full Array (WPR
not included)
1
1
0000h–7FFh
Table 2. Write Protect Status Table
6551 FRM T03
WP
0
X
1
WPEN
X
0
1
Memory Array
(Not Block
Protected)
Writable
Writable
Writable
Memory Array
(Block Protected)
Protected
Protected
Protected
BP Bits
Writable
Writable
Protected
WPEN Bit
Writable
Writable
Protected
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| X24165SM-2.7 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24165SMG | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24165SMG-2.7 | 制造商:ICMIC 制造商全稱:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24165ST2 | 制造商:Intersil Corporation 功能描述: 制造商:XICOR 功能描述: |
| X24165V | 制造商:XICOR 制造商全稱:Xicor Inc. 功能描述:Advanced 2-Wire Serial E2PROM with Block Lock Protection |
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