BR25L160FVJ-W datasheet(9/17 Pages) ROHM

Part #	BR25L160FVJ-W

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

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Manufacturer	ROHM [Rohm]

Direct Link	http://www.rohm.com

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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

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

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

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

0

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

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BR25L160FVJ-W Datasheet(PDF) 9 Page - Rohm

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