BR25L160-W datasheet(7/17 Pages) ROHM

Part #	BR25L160-W

Description	Htgh speed clock action up to 5MHz(Max.), Wait function by HOLD terminal

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Manufacturer	ROHM [Rohm]

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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

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

0110

0100

0011

0010

0001

WRSR

Status register write

command

Write status register

0000

* 101

0000

0101

Timing chart

CS

SO

High-Z

SI

0

00

0

* 1

1

10

SCK

1

02

3

4

5

6

7

Fig. 35 Write enable command

1.WREN (WRITE ENABLE) : Write enable

High-Z

CS

SO

SI

0

00

0

*

0

1

10

SCK

1

02

3

4

5

6

7

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

A8011

A8010

* 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

www.rohm.com

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