BR24T16FVJ-WGE2_ 데이터 시트보기 (PDF) - ROHM Semiconductor
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BR24T16FVJ-WGE2_ Datasheet PDF : 22 Pages
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BR24T□□□□Series
Technical Note
●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)
SDA
LINE
S
W
T
R
A
I
R
SLAVE T
T
ADDRESS E
1 0 1 0 A2 A1 A0
WA
7
Note)
RA
/C
WK
WORD
ADDRESS
WA
0
D7
A
C
K
S
T
DATA
O
P
D0
A
C
K
As for WA7, BR24T01-W becomes Don't care.
Fig.38 Byte write cycle (BR24T01/02/04/08/16-W)
SDA
LINE
S
W
T
R
A
I
R
SLAVE T
1st WORD
T
ADDRESS E
ADDRESS
1 0 1 0 A2 A1 A0
WAWA WA WAWA
15 14 13 12 11
RA
Note)
/C
*1
WK
2nd WORD
ADDRESS
DATA
S
T
O
P *1 As for WA12, BR24T32-W becomes Don't care.
As for WA13, BR24T32/64-W becomes Don't care.
WA D7
0
D0
As for WA14, BR24T32/64/128-W becomes Don't care.
As for WA15, BR24T32/64/128/256-W becomes Don't care.
A
A
A
C
C
C
K
K
K
Fig.39 Byte write cycle (BR24T32/64/128/256/512/1M-W)
SDA
LINE
S
W
T
R
A
I
R
SLAVE
T
T ADDRESS E
W ORD
A D D R E S S (n )
DATA(n)
S
*2
T
O
DATA(n+15)
P
1 0 1 0 A 2A 1A 0
WA
7
RA
注)
/ C *1
WK
WA
0
D7
A
C
K
D0
A
C
K
D0
A
C
K
Fig.40 Page write cycle (BR24T01/02/04/08/16-W)
*1 As for WA7, BR24T01-W becomes Don't care.
*2 As for BR24T01/02-W becomes (n+7)
SDA
LINE
S
W
T
R
A
I
R
SLAVE
T
T
ADDRESS
E
1st WORD
ADDRESS(n)
1 0 1 0 A2 A1 A0
WAWA WA WA WA
15 14 13 12 11
00
RA
注)
/C
*1
WK
2nd WORD
ADDRESS(n)
DATA(n)
WA
D7
D0
0
A
A
A
C
C
C
K
K
K
S
T
*2
O
DATA(n+31)
P
D0
A
C
K
*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)
Fig.41 Page write cycle (BR24T32/64/128/256/512/1M-W)
Note)
*1 *2 *3
1 0 1 0 A 2A 1A 0
*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.
Fig.42 Difference of slave address of each type
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