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參數(shù)資料
| 型號： | 25LC080A |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 8K SPI Bus Serial EEPROM |
| 中文描述： | 8K的SPI總線串行EEPROM |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 523K |
| 代理商： | 25LC080A |
2003 Microchip Technology Inc.
DS21808B-page 11
25XX080A/B
2.6
Write Status Register Instruction
(
WRSR
)
The Write Status Register instruction (
WRSR
) allows the
user to write to the nonvolatile bits in the Status
Register as shown in Table 2-2. The user is able to
select one of four levels of protection for the array by
writing to the appropriate bits in the Status Register.
The array is divided up into four segments. The user
has the ability to write-protect none, one, two or all four
of the segments of the array. The partitioning is
controlled as shown in Table 2-3.
The Write-Protect Enable (WPEN) bit is also a
nonvolatile bit that is available as an enable bit for the WP
pin. The Write-Protect (WP) pin and the Write-Protect
Enable (WPEN) bit in the Status Register control the
programmable hardware write-protect feature. Hardware
write protection is enabled when WP pin is low and the
WPEN bit is high. Hardware write protection is disabled
when either the WP pin is high or the WPEN bit is low.
When the chip is hardware write-protected, only writes to
nonvolatile bits in the Status Register are disabled. See
Table 2-4 for a matrix of functionality on the WPEN bit.
See Figure 2-7 for the WRSR timing sequence.
TABLE 2-3:
ARRAY PROTECTION
FIGURE 2-7:
WRITE STATUS REGISTER TIMING SEQUENCE (
WRSR
)
BP1
BP0
Array Addresses
Write-Protected
0
0
0
1
none
upper 1/4
(0300h - 03FFh)
1
0
upper 1/2
(0200h - 03FFh)
1
1
all
(0000h - 03FFh)
SO
SI
CS
9
10
11
12
13
14
15
0
1
0
0
0
0
0
0
7
6
5
4
2
1
0
instruction
data to Status Register
high-impedance
SCK
0
2
3
4
5
6
7
1
8
3
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 25LC080A-E/MS | 功能描述:電可擦除可編程只讀存儲器 1kx8 16B - 2.5V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25LC080A-E/MSG | 功能描述:電可擦除可編程只讀存儲器 1kx8 - 2.5V 16B Extended Temp RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25LC080A-E/P | 功能描述:電可擦除可編程只讀存儲器 1kx8 16B - 2.5V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25LC080A-E/PG | 功能描述:電可擦除可編程只讀存儲器 1kx8 - 2.5V 16B Extended Temp RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| 25LC080A-E/SN | 功能描述:電可擦除可編程只讀存儲器 1kx8 16B - 2.5V RoHS:否 制造商:Atmel 存儲容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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