参数资料
| 型号： | BR25S320F-WE2 |
| 厂商： | Rohm Semiconductor |
| 文件页数： | 7/19页 |
| 文件大小： | 0K |
| 描述： | IC EEPROM SPI 32KB 20MHZ 8-SOP |
| 标准包装： | 1 |
| 格式 - 存储器： | EEPROMs - 串行 |
| 存储器类型： | EEPROM |
| 存储容量： | 32K (4K x 8) |
| 速度： | 20MHz |
| 接口： | SPI 3 线串行 |
| 电源电压： | 1.7 V ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 8-SOIC（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-SOP |
| 包装： | 标准包装 |
| 其它名称： | BR25S320F-WE2DKR |
BR25S □□□ Series
Technical Note
● Features
○ Status registers
This IC has status register. The status register expresses the following parameters of 8 bits.
BP0 and BP1 can be set by write status register command. These 2 bits are memorized into the EEPROM, therefore are
valid even when power source is turned off.
Rewrite characteristics and data hold time are same as characteristics of the EEPROM.
WEN can be set by write enable command and write disable command. WEN becomes write disable status when power
source is turned off. R/B is for write confirmation, therefore cannot be set externally.
The value of status register can be read by read status register command.
1. Contexture of status register
Product number bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
BR25S320-W
BR25S640-W
―
BR25S128-W
WPEN
0
0
0
BP1
BP0
WEN
R /B
BR25S256-W
bit
WPEN
BP1
BP0
WEN
―
R /B
Memory
location
EEPROM
EEPROM
registers
registers
Function
WPB pin enable / disable designation bit
WPEN=0=invalid
WPEN=1=valid
EEPROM write disable block designation bit
Write and write status register write enable / disable status confirmation bit
WEN=0=prohibited
WEN=1=permitted
Write cycle status (READY / BUSY) status confirmation bit
―
R /B=0=READY
―
R /B=1=BUSY
2. Write disable block setting
BP1
BP0
BR25S320-W
Write disable block
BR25S640-W BR25S128-W
BR25S256-W
0
0
1
1
0
1
0
1
None
C00h-FFFh
800h-FFFh
000h-FFFh
None
1800h-1FFFh
1000h-1FFFh
0000h-1FFFh
None
3000h-3FFFh
2000h-3FFFh
0000h-3FFFh
None
6000h-7FFFh
4000h-7FFFh
0000h-7FFFh
○ WPB pin
By setting WPB=LOW, write command is prohibited. And the write command to be disabled at this moment is WRSR.
However, when write cycle is in execution, no interruption can be made.
Product number WRSR WRITE
BR25S320-W
BR25S640-W
BR25S128-W
Prohibition possible
but WPEN bit “1”
Prohibition
impossible
BR25S256-W
○ HOLDB pin
By HOLDB pin, data transfer can be interrupted. When SCK=”0”, by making HOLDB from “1” into”0”, data transfer to
EEPROM is interrupted. When SCK = “0”, by making HOLDB from “0” into “1”, data transfer is restarted.
www.rohm.com
? 2010 ROHM Co., Ltd. All rights reserved.
7/18
2010.12 - Rev.B
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相关代理商/技术参数 |
参数描述 |
|---|---|
| BR25S320NUX-WTR | 功能描述:电可擦除可编程只读存储器 电可擦除可编程只读存储器 Serial-SPI 32Kb 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 |
| BR25S320-W | 制造商:ROHM 制造商全称:Rohm 功能描述:High Reliability Series Serial EEPROMs |
| BR25S640FJ-WE2 | 功能描述:电可擦除可编程只读存储器 SPI 64K BIT 8K X 8 1.8V/2.5V/3.3V/5V 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 |
| BR25S640FVJ-WE2 | 制造商:ROHM Semiconductor 功能描述:EEPROM SERIAL-SPI 64K-BIT 8K X 8 1.8V/2.5V/3.3V/5V 8-PIN TSS - Tape and Reel 制造商:ROHM Semiconductor 功能描述:IC EEPROM 64KBIT 20MHZ 8SOP |
| BR25S640FVM-WTR | 制造商:ROHM Semiconductor 功能描述:EEPROM SERIAL-SPI 64K-BIT 8K X 8 1.8V/2.5V/3.3V/5V 8-PIN MSO - Tape and Reel 制造商:ROHM Semiconductor 功能描述:IC EEPROM 64KBIT 20MHZ 8MSOP 制造商:ROHM Semiconductor 功能描述:SPI 64K BIT 8K X 8 1.8V/2.5V/3.3V/5V |
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