8/16

For example, when it is started from address 06h,

therefore, increment is made as below,

06h → 07h → 00h → 01h ---, which please note.

* 06h --- 06 in hexadecimal, therefore, 00000110 becomes a binary

number.

Note)

*1

*2

*3

Fig.42　スレイブアドレスの各機種の違い

tWR (maximum : 5ms)

Command is not accepted for this period.

SDA

LINE

S

T

A

R

T

SLAVE

ADDRESS

10

0

1

R

/

W

W

R

I

T

E

A

C

K

A

C

K

A

C

K

D7

DATA (n)

D0

DATA (n+7)

Next command

D0

1 0 1 0

S

T

O

P

A

C

K

WORD

ADDRESS (n)

WA

0

WA

7

A0

A1

A2

Fig.41 Page write cycle

List of numbers of page write

Number of

pages

Product

number

8 Byte

BR24L01A-W

BR24L02-W

BR24L32-W

BR24L64-W

BR24L04-W

The above numbers are maximum bytes for respective types. Any bytes

below these can be written.

BR24L08-W

BR24L16-W

16 Byte

32 Byte

0

1

0

1

A2

A1

A0

1

＊

3

Note)

At STOP (stop bit),

write starts.

WA7

WA4 WA3

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

0

WA2 WA1 WA0

0

0

0

0

0

1

0

1

0

1

1

0

1

1

1

0

0

0

Increment

06h

Significant bit is fixed.

No digit up

Notes on page write cycle

Write protect terminal (WP)

Notes on write cycle continuous input

Note)

* 1 * 2 * 3

Fig.42 Difference of each type of slave address

*1 BR24L01A-W becomes Don't Care.

*2 BR24L04W-W, BR24L08-W, and BR24L16-W become (n + 15).

*3 BR24L32-W and BR24L64-W become (n + 31).

*1 In BR24L16-W, A2 becomes P2.

*2 In BR24L08-W, BR24L16-W, A1 becomes P1.

*3 In BR24L04-W, A0 becomes PS, and in BR24L08-W

and BR24L16-W, A0 becomes P0.

In the case of BR24L02-W, 1 page = 8 bytes, but the page write cycle write time is 5ms at

maximum for 8byte bulk write.

It does not stand 5ms at maximum x 8 bytes = 40ms (Max.).

Internal address increment

Page write mode (in the case of BR24L02-W)

Write protect function (WP)

When WP terminal is set Vcc (H level), data rewrite of all addresses is prohibited. When it is set GND (L level), data rewrite of all

addresses is enabled. Be sure to connect this terminal to Vcc or GND, or control it to H level or L level. Do not use it open.

At extremely low voltage at power ON/OFF, by setting the WP terminal "H", mistake write can be prevented.

During tWR, set the WP terminal always to "L". If it is set "H", write is forcibly terminated.