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| 型号： | X24645VG-2.7 |
| 厂商： | IC MICROSYSTEMS SDN BHD |
| 元件分类： | DRAM |
| 英文描述： | ED,SMD 0805,RED,660NM, WATER CLEAR,20MCD@20mA |
| 中文描述： | 8K X 8 I2C/2-WIRE SERIAL EEPROM, PDSO20 |
| 封装： | ROHS COMPLIANT, PLASTIC, TSSOP-20 |
| 文件页数： | 10/18页 |
| 文件大小： | 331K |
| 代理商： | X24645VG-2.7 |
X24645
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 is HIGH and the WPEN bit is “1”, and disabled
when either the WP pin is LOW or the WPEN bit is “0”.
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
2783 FRM T02
BP1
BP0
Protected
Addresses
0
0
None
0
1
1800h–1FFFh
Upper 1/4
1
0
1000h–1FFFh
Upper 1/2
1
1
0000h–1FFFh
Full Array (WPR
not included)
Table 2. Write Protect Status Table
2783 FRM T03.1
WP
WPEN
Memory Array
(Not Block
Protected)
Memory Array
(Block Protected)
BP Bits
WPEN Bit
L
X
Writable
Protected
Writable
Writable
X
0
Writable
Protected
Writable
Writable
H
1
Writable
Protected
Protected
Protected
相关PDF资料 |
PDF描述 |
|---|---|
| X24645VIG | ED,SMD 0603,RED, 660NM, WATER CLEAR,300MCD@20mA |
| X24645VIG-2.7 | Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645VMG | Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645VMG-2.7 | Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24C01APG-3.5 | Serial E2PROM |
相关代理商/技术参数 |
参数描述 |
|---|---|
| X24645VI | 制造商:XICOR 制造商全称:Xicor Inc. 功能描述:Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
| X24645VI-2.7 | 制造商:ICMIC 制造商全称:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645VIG | 制造商:ICMIC 制造商全称:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645VIG-2.7 | 制造商:ICMIC 制造商全称:IC MICROSYSTEMS 功能描述:Advanced 2-Wire Serial E2PROM with Block LockTM Protection |
| X24645VM | 制造商:XICOR 制造商全称:Xicor Inc. 功能描述:Advanced 2-Wire Serial E 2 PROM with Block Lock TM Protection |
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