参数资料
| 型号： | 25LC320/SN |
| 厂商： | Microchip Technology |
| 文件页数： | 11/26页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM 32KBIT 2MHZ 8SOIC |
| 标准包装： | 100 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 32K (4K x 8) |
| 速度： | 2MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 2.5 V ~ 5.5 V |
| 工作温度： | 0°C ~ 70°C |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm 宽） |
| 供应商设备封装： | 8-SOICN |
| 包装： | 管件 |
| 产品目录页面： | 1449 (CN2011-ZH PDF) |
25AA320/25LC320/25C320
3.6
Write Status Register Instruction
When the chip is hardware write-protected, only writes
( WRSR )
The Write Status Register instruction ( WRSR ) allows the
user to select one of four levels of protection for the
array by writing to the appropriate bits in the STATUS
to nonvolatile bits in the STATUS register are disabled.
See Table 3-3 for a matrix of functionality on the WPEN
bit.
See Figure 3-7 for the WRSR timing sequence.
register. The array is divided up into four segments.
The user has the ability to write-protect none, one, two,
TABLE 3-2:
ARRAY PROTECTION
or all four of the segments of the array. The partitioning
is controlled as shown in Table 3-2.
The Write-Protect Enable (WPEN) bit is 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 pro-
grammable 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.
BP1
0
0
1
1
BP0
0
1
0
1
Array Addresses
Write-Protected
none
upper 1/4
(0C00h-0FFFh)
upper 1/2
(0800h-0FFFh)
all
(0000h-0FFFh)
FIGURE 3-7:
CS
WRITE STATUS REGISTER TIMING SEQUENCE
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
SCK
Instruction
Data to STATUS Register
SI
0
0
0
0
0
0
0
1
7
6
5
4
3
2
1
0
High-Impedance
SO
? 2008 Microchip Technology Inc.
DS21227F-page 11
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PDF描述 |
|---|---|
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| 25AA640-I/SN | IC EEPROM 64KBIT 1MHZ 8SOIC |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 25LC320T | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32K SPI Bus Serial EEPROM |
| 25LC320T/SN | 功能描述:电可擦除可编程只读存储器 4kx8 RoHS:否 制造商:Atmel 存储容量:2 Kbit 组织:256 B x 8 数据保留:100 yr 最大时钟频率:1000 KHz 最大工作电流:6 uA 工作电源电压:1.7 V to 5.5 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 |
| 25LC320T-/SN | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SPI Serial EEPROM |
| 25LC320T-/ST | 制造商:未知厂家 制造商全称:未知厂家 功能描述:SPI Serial EEPROM |
| 25LC320TE/P | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:32K SPI Bus Serial EEPROM |
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