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参数资料
| 型号： | M95080-VDL3T |
| 厂商： | 意法半导体 |
| 元件分类： | DRAM |
| 英文描述： | 64/32/16/8 Kbit Serial SPI Bus EEPROM With High Speed Clock |
| 中文描述： | 64/32/16/8千位串行SPI总线的EEPROM高速时钟 |
| 文件页数： | 10/39页 |
| 文件大小： | 590K |
| 代理商： | M95080-VDL3T |
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M95640, M95320
10/39
Status Register
Figure 8 shows the position of the Status Register
in the control logic of the device. The Status Reg-
ister contains a number of status and control bits
that can be read or set (as appropriate) by specific
instructions.
WIP bit.
The Write In Progress (WIP) bit indicates
whether the memory is busy with a Write or Write
Status Register cycle.
WEL bit.
The Write Enable Latch (WEL) bit indi-
cates the status of the internal Write Enable Latch.
BP1, BP0 bits.
The Block Protect (BP1, BP0) bits
are non-volatile. They define the size of the area to
be software protected against Write instructions.
SRWD bit.
The Status Register Write Disable
(SRWD) bit is operated in conjunction with the
Write Protect (W) signal. The Status Register
Write Disable (SRWD) bit and Write Protect (W)
signal allow the device to be put in the Hardware
Protected mode. In this mode, the non-volatile bits
of the Status Register (SRWD, BP1, BP0) become
read-only bits.
Table 2. Status Register Format
Data Protection and Protocol Control
Non-volatile memory devices can be used in envi-
ronments that are particularly noisy, and within ap-
plications that could experience problems if
memory bytes are corrupted. Consequently, the
device features the following data protection
mechanisms:
I
Write and Write Status Register instructions are
checked that they consist of a number of clock
pulses that is a multiple of eight, before they are
accepted for execution.
I
All instructions that modify data must be
preceded by a Write Enable (WREN) instruction
to set the Write Enable Latch (WEL) bit . This bit
is returned to its reset state by the following
events:
– Power-up
– Write Disable (WRDI) instruction completion
– Write Status Register (WRSR) instruction
completion
– Write (WRITE) instruction completion
I
The Block Protect (BP1, BP0) bits allow part of
the memory to be configured as read-only. This
is the Software Protected Mode (SPM).
I
The Write Protect (W) signal allows the Block
Protect (BP1, BP0) bits to be protected. This is
the Hardware Protected Mode (HPM).
For any instruction to be accepted, and executed,
Chip Select (S) must be driven High after the rising
edge of Serial Clock (C) for the last bit of the in-
struction, and before the next rising edge of Serial
Clock (C).
Two points need to be noted in the previous sen-
tence:
– The ‘last bit of the instruction’ can be the eighth
bit of the instruction code, or the eighth bit of a
data byte, depending on the instruction (except
for Read Status Register (RDSR) and Read
(READ) instructions).
– The ‘next rising edge of Serial Clock (C)’ might
(or might not) be the next bus transaction for
some other device on the SPI bus.
Table 3. Write-Protected Block Size
b7
b0
SRWD
0
0
0
BP1
BP0 WEL WIP
Status Register Write Protect
Block Protect Bits
Write Enable Latch Bit
Write In Progress Bit
Status Register Bits
Protected Block
Array Addresses Protected
BP1
BP0
M95640
M95320
0
0
none
none
none
0
1
Upper quarter
1800h - 1FFFh
0C00h - 0FFFh
1
0
Upper half
1000h - 1FFFh
0800h - 0FFFh
1
1
Whole memory
0000h - 1FFFh
0000h - 0FFFh
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M95080-WBN6 | 功能描述:电可擦除可编程只读存储器 5.5V 8K (1Kx8) 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 |
| M95080-WBPMN6 | 功能描述:电可擦除可编程只读存储器 5.5V 8K (1Kx8) 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 |
| M95080-WBPMN6T | 功能描述:电可擦除可编程只读存储器 5.5V 8K (1Kx8) 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 |
| M95080-WDW6T | 功能描述:电可擦除可编程只读存储器 5.5V 8K (1Kx8) 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 |
| M95080-WDW6TP | 功能描述:电可擦除可编程只读存储器 2.5 V to 5.5V 8K 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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