Datasheet

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
starting CS, data up to 16/32
*1
bytes can be written for one tE/W. In page write, the insignificant 4/5
*2
bit of the
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-A0BR25L020-W
BR25L010-W
BR25L040-W A8-A0
A9-A0
A10-A0BR25L160-W
BR25L080-W
BR25L320-W A11-A0
BR25L640-W A12-A0
Product
number
Address
length
A6-A0
A7-A0BR25L020-W
BR25L010-W
BR25L040-W A8-A0
A9-A0
A10-A0BR25L160-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
code. EEPROM starts data output of the designated address. Data output is started from SCK fall of 15/23
*1
clock, and
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 00
11
A12
***
A1
A0
1234 5 678
23 24 30
CS
SCK
SI
SO
D6D7
D0D1D2
High-Z
Fig.39 Write command (BR25L010/020/040-W)
Fig.40 Write command (BR25L080/160/320/640-W)
0
0000 0001
A1A12 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
A4A5
A6A7
* 1 A1 A0
1234567891011 14151617 22
CS
SCK
SI
SO
D6D7
D0D1D2
High-Z
BR25L010/020-W
=
Don't care
BR25L040-W
=
A8
* 1
0
0000 0 01
A4A5A6A7 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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