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参数资料
| 型号： | 25LC040A-E/ST |
| 元件分类： | PROM |
| 英文描述： | 512 X 8 SPI BUS SERIAL EEPROM, PDSO8 |
| 封装： | 4.40 MM, ROHS COMPLIANT, PLASTIC, TSSOP-8 |
| 文件页数： | 2/30页 |
| 文件大小： | 452K |
| 代理商： | 25LC040A-E/ST |
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25AA040A/25LC040A
DS21827F-page 10
2009 Microchip Technology Inc.
2.5
Read Status Register Instruction
(RDSR)
The Read Status Register instruction (RDSR) provides
access to the STATUS register. See Figure 2-6 for the
RDSR
timing sequence. The STATUS register may be
read at any time, even during a write cycle. The
STATUS register is formatted as follows:
TABLE 2-2:
STATUS REGISTER
The Write-In-Process (WIP) bit indicates whether the
25XX040A is busy with a write operation. When set to
a ‘1’, a write is in progress, when set to a ‘0’, no write
is in progress. This bit is read-only.
The Write Enable Latch (WEL) bit indicates the status
of the write enable latch and is read-only. When set to
a ‘1’, the latch allows writes to the array, when set to a
‘0’, the latch prohibits writes to the array. The state of
this bit can always be updated via the WREN or WRDI
commands regardless of the state of write protection
on the STATUS register. These commands are shown
in Figure 2-4 and Figure 2-5.
The Block Protection (BP0 and BP1) bits indicate
which blocks are currently write-protected. These bits
are set by the user issuing the WRSR instruction, which
is shown in Figure 2-7. These bits are nonvolatile and
are described in more detail in Table 2-3.
FIGURE 2-6:
READ STATUS REGISTER TIMING SEQUENCE (RDSR)
7
654
3
2
1
0
–
–––
W/R
R
X
XXX
BP1
BP0
WEL
WIP
W/R = writable/readable. R = read-only.
SO
SI
CS
9
1011
12131415
11
0
00
76
5
4
2
1
0
Instruction
Data from STATUS Register
High-impedance
SCK
0
2
34
56
7
18
3
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相关代理商/技术参数 |
参数描述 |
|---|---|
| 25LC040A-H/SN | 功能描述:电可擦除可编程只读存储器 4K, 512 X 8, 2.5V SER EE 150C 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 |
| 25LC040A-I/MC | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4K SPI Bus Serial EEPROM |
| 25LC040A-I/MS | 功能描述:电可擦除可编程只读存储器 4K 512X8 2.5V SER EE IND 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 |
| 25LC040A-I/OT | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:4K SPI Bus Serial EEPROM |
| 25LC040A-I/P | 功能描述:电可擦除可编程只读存储器 4K 512X8 2.5V SER EE IND 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 |
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