- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄374675 > SA25F020LEM8 (Electronic Theatre Controls, Inc.) RES 69.8 OHM 1/10W .5% 0805 SMD PDF資料下載
參數(shù)資料
| 型號： | SA25F020LEM8 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | RES 69.8 OHM 1/10W .5% 0805 SMD |
| 中文描述： | 2MB的串行閃存與25MHz的SPI總線接口 |
| 文件頁數(shù)： | 21/37頁 |
| 文件大?。?/td> | 560K |
| 代理商： | SA25F020LEM8 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁
SA25F020 Advanced Information
SAIFUN
21
Write Status Register (WRSR)
The WRSR instruction enables the user to
select one of four levels of protection. The
SA25F020 is divided into four array
segments. The top quarter, top half or all of
the memory segments can be protected
(for more details, refer to Table 9). The
data within a selected segment is therefore
read-only.
Table 9. Block Write Protect Bits
Status Register Bits
Level
BP1
BP0
Array Addresses
Protected
0
0
0
None
1/4
0
1
30000 - 3FFFF
1/2
1
0
20000 - 3FFFF
All
1
1
00000 - 3FFFF
The WRSR instruction (as shown in
Table 10) also allows the user to enable or
disable the WPb pin via the WPBEN bit.
Hardware write protection is enabled when
the WPb pin is low and the WPBEN bit is
1, and disabled when either the WP pin is
high or the WPBEN bit is 0. When the
device is hardware write protected, writes
to the status register are disabled.
NOTE:
When the WPBEN bit is hardware write
protected, it cannot be changed back
to 0 while the WPb pin is held low.
Table 10. WPBEN Operation
WPb WPBEN WENPBlocks
Un-
protected
Blocks
Status
Register
X
0
0
Protected
Protected Protected
X
0
1
Protected
Writeable Writeable
Low
1
0
Protected
Protected Protected
Low
1
1
Protected
Writeable Protected
High
X
0
Protected
Protected Protected
High
X
1
Protected
Writeable Writeable
The WRSR instruction is enabled:
1. When the WPb pin is held high and
the device has been previously write
enabled via the WREN instruction.
2. When the WPb pin is held low, the
WPBEN bit is 0 and the device has
been previously write enabled via the
WREN instruction.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SA25F020LEM8F | 4 Mbit Uniform Sector, Serial Flash Memory |
| SA25F020LEMLF | 4 Mbit Uniform Sector, Serial Flash Memory |
| SA25F020LEMLFF | 4 Mbit Uniform Sector, Serial Flash Memory |
| SA25F020LEN | RES 82.5 OHM 1/10W .5% 0805 SMD |
| SA25F020LEMLFFX | 4 Mbit Uniform Sector, Serial Flash Memory |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SA25F020LEM8F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEM8FX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEMLF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEMLFF | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
| SA25F020LEMLFFX | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:2Mb Serial Flash with 25MHz SPI Bus Interface |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。