Datasheet

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BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W
Technical Note
1. Write enable (WREN) / disable (WRDI) cycle
Command mode
0000
0000
0000
0000
Ope code
Command
WREN
WRDI
READ
WRITE
Contents
Write enable command
Write disable command
Read command
Write command
BR25L080-W
BR25L160-W
BR25L320-W
BR25L640-W
BR25L010-W
BR25L020-W
BR25L040-W
Write enable
Write disable
Read
Write
RDSR
Status register read
command
Read status register
0000
* 110
* 100
* 011
* 010
* 001
0000
0000
0000
0000
0000
0000
0000
0000
0000
0000
0110
0100
0011
0010
0001
WRSR
Status register write
command
Write status register
0000 * 101 0000 0000 0101
Timing chart
CS
SO
High-Z
SI
0000* 1 110
SCK
10234567
Fig. 35 Write enable command
1.WREN (WRITE ENABLE) : Write enable
High-Z
CS
SO
SI
0000* 0110
SCK
10234567
Fig. 36 Write disable
1.WRDI (WRITE DISABLE) : Write disable
*1 BR25L010/020/040-W=
Don't care
BR25L080/160/320/640-W=
“0” input
*1 BR25L010/020/040
- W=
Don't care
BR25L080/160/320/640 - W=
“0” input
* 110
* 100
A
8011
A
8010
* 001
* 101
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.
2010.07 - Rev. B
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