BR24L01AF-WE2 Datasheet, PDF (29/41 Pages) Rohm – High Reliability Series EEPROMs I2C BUS

BR24L□□-W Series,BR24S□□□-W Series
Technical Note
○Notes on write cycle continuous input
SDA
LINE
S
T
A
R
T
SLAVE
ADDRESS
W
R
I
T
E
WORD
ADDRESS（ｎ）
DATA(n)
DATA(n+15)
At STOP (stop bit)
write starts.
S
S
T
T
A
O
R
P
T
1 0 1 0 P2 P1P0
WA
7
RA
note) / C
WK
WA
0 ^D7
A
C
K
D0
A
C
K
D0
A
C
K
Fig.38 Page write cycle(BR24S08/16-W)
1 0 10
Next command
tWR(maximum：5ms)
Command is not accepted for this
period.
S
T
A
R
SDA _T
L IN E
W
R
I
SLAVE
T
ADDRESS E
1 0 1 0 A 2A 1A 0
1st W ORD
ADDRESS(n)
＊ ^{W A W AW A W A}
14 13 12 11
note)
RA
/C
*1
A
C
WK
K
2nd W ORD
ADDRESS(n)
DATA(n)
WA _D7
0
A
C
K
D0
A
C
K
A t STOP (stop bit)
write starts.
S
S
T
*2
T
O
D A TA (n+ 31 )
P
A
R
T
*1
D0
A
C
K
1 010
*2
Next command
tW R (maximu m : 5m s)
Command is not accepted for
this period.
As for WA12, BR24S32-W becomes Don't care.
As for WA13, BR24S32/64-W becomes Don't care.
As for WA14, BR24S32/64/128-W becomes Don't care.
As for BR24S128/256-W becomes (n+63).
Fig.39 Page write cycle(BR24S32/64/128/256-W)
○Notes on page write cycle
List of numbers of page write
Number of pages
Product number
16Byte
BR24S08-W
BR24S16-W
32Byte
BR24S32-W
BR24S64-W
64Byte
BR24S128-W
BR24S256-W
The above numbers are maximum bytes for respective types. Any bytes below these can be written.
In the case of BR24S256-W, 1 page = 64bytes, but the page write cycle write time is 5ms at maximum for 64byte bulk write.
It does not stand 5ms at maximum × 64byte = 320ms(Max.).
www.rohm.com
© 2009 ROHM Co., Ltd. All rights reserved.
29/40
2009.09 - Rev.D