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BR25L010-W Datasheet(PDF) 9 Page - Rohm

Part # BR25L010-W
Description  SPI BUS Serial EEPROMs
Download  17 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BR25L010-W Datasheet(HTML) 9 Page - Rohm

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BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W
Technical Note
Write status register command can write status register data. The data the can be written by this command are 2 bits *1,
that is, BP1 (bit3) and BP0 (bit2) among 8 bits of status register. By BP1 and BP0, write disable block of EEPROM can be
set. As for this command, set CS LOW, and input ope code of write status register, and input data. Then, by making CS
HIGH, EEPROM starts writing. Write time requires time of tE/W as same as write. As for CS rise, start CS after taking the
last data bit (bit0), and before the next SCK clock starts. At other timing, command is cancelled. Write disable block is
determined by BP1 and BP0, and the block can be selected from 1/4 of memory array, 1/2, and entire memory array.
(Refer to the write disable block setting table.) To the write disabled block, write cannot be made, and only read can be
made.
Fig.41 Status register write command (BR25L010/020/040-W)
0
00
00
0
*
0
1
BP1 BP0
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
12
3
4
5
6
7
8
9
10
11
12
13
14
15
CS
SCK
SI
SO
High-Z
**
*
*
*
*
* =Don't care
Fig.42 Status register write command (BR25L080/160/320/640-W)
0
00
0
0
0
0
0
1
BP1 BP0
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
12
3
4
5
6
7
8
9
10
11
12
13
14
15
CS
SCK
SI
SO
High-Z
**
*
*
*
WPEN
* =Don't care
Fig.43 Status register read command (BR25L010/020/040-W)
0
00
00
0
11
12
3
4
5
6
7
8
9
10
11
12
13
14
15
CS
SCK
SI
SO
High-Z
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
BP1
1
11
1
BP0 WEN
R/B
*
* =Don't care
Fig.44 Status register read command (BR25L080/160/320/640-W)
00
00
0
0
1
1
High-Z
bit0
bit1
bit2
bit3
bit4
bit5
bit6
bit7
BP1 BP0
WEN
WPEN
00
0
R/B
SI
SO
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
CS
SCK
4. Status register write / read command
* 3 bits including BR25L080, 160, 320, 640-W WPEN (bit7)
2010.07 -
Rev. B
www.rohm.com
© 2010 ROHM Co., Ltd. All rights reserved.


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