参数资料
型号: BR25L020FV-WE2
厂商: Rohm Semiconductor
文件页数: 7/17页
文件大小: 0K
描述: IC EEPROM SER 2KB SPI BUS 8SSOP
标准包装: 2,500
格式 - 存储器: EEPROMs - 串行
存储器类型: EEPROM
存储容量: 2K (256 x 8)
速度: 5MHz
接口: SPI 3 线串行
电源电压: 1.8 V ~ 5.5 V
工作温度: -40°C ~ 85°C
封装/外壳: 8-SSOP 1 型(0.173",4.4mm 宽)
供应商设备封装: SSOP-8B
包装: 带卷 (TR)

BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W
Command mode
Ope code
Technical Note
Command
Contents
BR25L010-W
BR25L020-W
BR25L040-W
BR25L080-W
BR25L160-W
BR25L320-W
BR25L640-W
WREN Write enable
Write enable command
0000
* 110
0000
* 110
0000
0110
WRDI
READ
Write disable
Read
Write disable command
Read command
0000
0000
* 100
* 011
0000
0000
* 100
A 8 011
0000
0000
0100
0011
WRITE Write
Write command
0000
* 010
0000
A 8 010
0000
0010
RDSR
Read status register
Status register read
command
0000
* 101
0000
* 101
0000
0101
WRSR Write status register
Status register write
command
0000
* 001
0000
* 001
0000
0001
Timing chart
1. Write enable (WREN) / disable (WRDI) cycle
1.WREN (WRITE ENABLE) : Write enable
CS
SCK
SI
0
0
0
1
0
2
0
3
*1
4
1
5
6
1
7
0
SO
High-Z
Fig. 35 Write enable command
1.WRDI (WRITE DISABLE) : Write disable
CS
*1 BR25L010/020/040-W=Don't care
BR25L080/160/320/640-W=“0” input
SCK
SI
0
0
0
1
0
2
0
3
* 1
4
1
5
0
6
0
7
SO
High-Z
Fig. 36 Write disable
*1 BR25L010/020/040-W=Don't care
BR25L080/160/320/640-W=“0” input
This IC has write enable status and write disable status. It is set to write enable status by write enable command, and it is
set to write disable status by write disable command. As for these commands, set CS LOW, and then input the respective
ope codes. The respective commands accept command at the 7-th clock rise. Even with input over 7 clocks, command
becomes valid.
When to carry out write and write status register command, it is necessary to set write enable status by the write enable
command. If write or write status register command is input in the write disable status, commands are cancelled. And even
in the write enable status, once write and write status register command is executed once, it gets in the write disable
status. After power on, this IC is in write disable status.
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? 2010 ROHM Co., Ltd. All rights reserved.
7/16
2010.07 - Rev. B
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