8/16

BR25L010-W, BR25L020-W, BR25L040-W, BR25L080-W, BR25L160-W, BR25L320-W, BR25L640-W

Technical Note

By write command, data of EEPROM can be written. As for this command, set CS LOW, then input address and data

after write ope code. Then, by making CS HIGH, the EEPROM starts writing. The write time of EEPROM requires time of

tE/W (Max 5ms). During tE/W, other than status read command is not accepted. Start CS after taking the last data (D0),

and before the next SCL clock starts. At other timing, write command is not executed, and this write command is

cancelled. This IC has page write function, and after input of data for 1 byte (8 bits), by continuing data input without

designated address is incremented internally at every time when data of 1 byte is input, and data is written to respective

addresses. When data of the maximum bytes or higher is input, address rolls over, and previously input data is

overwritten.

BR25L010/020/040-W=16 bytes at maximum

BR25L080/160/320/640-W=32 bytes at maximum

* 1

BR25L010/020/040-W=Insignificant 4 bits

BR25L080/160/320/640-W=Insignificant 5 bits

* 2

A6-A0

A7-A0

BR25L020-W

BR25L010-W

BR25L040-W

A8-A0

A9-A0

A10-A0

BR25L160-W

BR25L080-W

BR25L320-W

A11-A0

BR25L640-W

A12-A0

Product

number

Address

length

A6-A0

A7-A0

BR25L020-W

BR25L010-W

BR25L040-W

A8-A0

A9-A0

A10-A0

BR25L160-W

BR25L080-W

BR25L320-W

A11-A0

BR25L640-W

A12-A0

By read command, data of EEPROM can be read. As for this command, set CS LOW, then input address after read ope

from D7 to D0 sequentially. This IC has increment read function. After output of data for 1 byte (8 bits), by continuing input

of SCK, data of the next address can be read. Increment read can read all the addresses of EEPROM. After reading data

of the most significant address, by continuing increment read, data of the most insignificant address is read.

BR25L010/020/040-W=15 clocks

BR25L080/160/320/640-W=23 clocks

* 1

Fig. 37 Read command (BR25L010/020/040-W)

Fig. 38 Read command (BR25L080/160/320/640-W)

0

00

0

0

0

0

11

A12

**

*

A1

A0

12

3

4

5

6

7

8

23

24

30

CS

SCK

SI

SO

D6

D7

D0

D1

D2

High-Z

Fig.39 Write command (BR25L010/020/040-W)

Fig.40 Write command (BR25L080/160/320/640-W)

0

00

00

0

00

1

A1

A12

A0

D7

D6

1

2

3

4

5

6

7

8

23

24

30

31

CS

SCK

SI

SO

D2

D1

D0

High-Z

* =Don't care

* =Don't care

* =Don't care

*

*

*

3. Write command (WRITE)

2. Read command (READ)

0

00

0

0

0

11

A4

A5

A6

A7

* 1

A1

A0

12

3

4

5

6

7

8

9

10

11

14

15

16

17

22

CS

SCK

SI

SO

D6

D7

D0

D1

D2

High-Z

BR25L010/020-W=Don't care

BR25L040-W=A8

* 1

0

00

00

0

0

1

A4

A5

A6

A7

A1

A0

D7

D6

1

2

3

4

5

6

7

8

15

16

22

23

CS

SCK

SI

SO

D2

D1

D0

High-Z

BR25L010/020-W=Don't care

BR25L040-W=A8

* 1

* 1

Product

number

Address

length

Product

number

Address

length

Product

number

Address

length

2010.07 -

Rev. B

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