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BR24T32-W Datasheet(PDF) 8 Page - Rohm

Part # BR24T32-W
Description  Other devices than EEPROM can be connected to the same port, saving microcontroller port
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BR24T32-W Datasheet(HTML) 8 Page - Rohm

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Technical Note
8/21
BR24T□□□□Series
www.rohm.com
2011.03 - Rev.A
© 2011 ROHM Co., Ltd. All rights reserved.
●Write Command
○Write cycle
・Arbitrary data is written to EEPROM. When to write only 1 byte, byte write is normally used, and when to write
continuous data of 2 bytes or more, simultaneous write is possible by page write cycle. The maximum number of write
bytes is specified per device of each capacity. Up to 256 arbitrary bytes can be written.(In the case of BR24T1M-W)
W
R
I
T
E
S
T
A
R
T
R
/
W
A
C
K
S
T
O
P
WO R D
ADD R ESS(n )
DAT A (n)
SDA
LIN E
A
C
K
A
C
K
D A T A (n+ 15)
A
C
K
SL AVE
ADDR E SS
1 0
0
1A 0
A1
A2
WA
7
D0
D7
D 0
注 )
WA
0
A1
A2
WA
7
D7
1
1
0
0
W
R
I
T
E
S
T
A
R
T
R
/
W
S
T
O
P
WORD
ADDRESS
DATA
SLAVE
ADDRESS
A0
WA
0
D0
A
C
K
SDA
LINE
A
C
K
A
C
K
Note)
Fig.38 Byte write cycle
(BR24T01/02/04/08/16-W)
A1
A2
WA
14
1
1
0
0
W
R
I
T
E
S
T
A
R
T
R
/
W
S
T
O
P
1st WORD
ADDRESS
DATA
SLAVE
ADDRESS
A0
D0
A
C
K
SDA
LINE
A
C
K
A
C
K
Note)
WA
13
WA
12
WA
11
WA
0
A
C
K
2nd WORD
ADDRESS
D7
*1
WA
15
*1
As for WA12, BR24T32-W becomes Don't care.
As for WA13, BR24T32/64-W becomes Don't care.
As for WA14, BR24T32/64/128-W becomes Don't care.
As for WA15, BR24T32/64/128/256-W becomes Don't care.
Fig.39 Byte write cycle
(BR24T32/64/128/256/512/1M-W)
Fig.40 Page write cycle
(BR24T01/02/04/08/16-W)
Fig.41 Page write cycle
(BR24T32/64/128/256/512/1M-W)
*1
As for WA12, BR24T32-W becomes Don't care.
As for WA13, BR24T32/64-W becomes Don't care.
As for WA14, BR24T32/64/128-W becomes Don't care.
As for WA15, BR24T32/64/128/256-W becomes Don't care.
*2
As for BR24T128/256-W becomes (n+63)
As for BR24T512-W becomes (n+127)
As for BR24T1M-W becomes (n+255)
W
R
I
T
E
S
T
A
R
T
R
/
W
A
C
K
S
T
O
P
1st WORD
ADDRESS(n)
SDA
LINE
A
C
K
A
C
K
DATA(n+31)
A
C
K
SLAVE
ADDRESS
1
0
0
0
1
0
A0
A1
A2
WA
14
D0
注 )
*1
DATA(n)
D0
D7
A
C
K
2nd WORD
ADDRESS(n)
WA
0
WA
13
WA
12
WA
11
*2
Note)
Fig.42 Difference of slave address of each type
As for WA7, BR24T01-W becomes Don't care.
*1
As for WA7, BR24T01-W becomes Don't care.
*2
As for BR24T01/02-W becomes (n+7)
*2
*1
WA
15
*1
In BR24T16-W, A2 becomes P2.
*2
In BR24T08/16-W, A1 becomes P1.
*3
In BR24T04/08/16/1M-W A0 becomes P0.
1 0
0
1A 0
A1
A2
*1 *2 *3


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