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10
Serial 2 Wire Interface (I2C BUS Type)
R
/
W
R
/
W
1
WA12
A2 A1 A0
WA0
D7
D0
S
T
O
P
SLAVE
ADDRESS
010
1st WORD
ADDRESS(n)
*1
DATA(n)
A0
A1
A2
10 1
0
R
E
A
D
SLAVE
ADDRESS
A
C
K
A
C
K
A
C
K
A
C
K
S
T
A
R
T
W
R
I
T
E
∗∗∗
S
T
A
R
T
2nd WORD
ADDRESS(n)
A
C
K
SDA
LINE
R
/
W
WA12
S
T
A
R
T
SDA
LINE
A
C
K
1A2 A1 A0
WA0
A
C
K
A
C
K
W
R
I
T
E
SLAVE
ADDRESS
01
0
1st WORD
ADDRESS
*1
D7
D0
A
C
K
S
T
O
P
DATA
2nd WORD
ADDRESS
∗∗∗
Timing chart
*1: WA12…Don't Care (BR24L32)
S
T
A
R
T
SDA
LINE
A
C
K
R
/
W
1A2 A1 A0
A
C
K
R
E
A
D
SLAVE
ADDRESS
01
0
D7
D0
S
T
O
P
DATA
S
T
A
R
T
W
R
I
T
E
SLAVE
ADDRESS
1st WORD
ADDRESS(n)
S
T
O
P
DATA(n)
2nd WORD
ADDRESS(n)
DATA(n+31)
SDA
LINE
A
C
K
R
/
W
1
WA12
A2 A1 A0
WA0
A
C
K
A
C
K
01
0
*1
D7
D0
A
C
K
D0
A
C
K
∗∗∗
SDA
LINE
1A2 A1 A0
D7
D0
S
T
O
P
SLAVE
ADDRESS
010
DATA(n+x)
A
C
K
R
/
W
A
C
K
A
C
K
A
C
K
S
T
A
R
T
R
E
A
D
DATA(n)
D7
D0
Note : BR24C32/F has no letter "-W", but it is a double-cell type.
BR24C64/F is a single-cell type.
Please be careful not to confuse w-cell type and single-cell type. ("-W" means double-cell type.)
Sequential read cycle
Random read cycle
Current read cycle
Page write cycle
Byte write cycle
1.8V
Low
voltage
operating
1,000,000
Write
cycle