BR24L02-W Rohm Semiconductor, BR24L02-W Datasheet - Page 24

• Manufacturer Part Number: BR24L02-W
• Description: IC EEPROM 2KBIT 400KHZ 8DIP
• Manufacturer: Rohm Semiconductor

Specifications of BR24L02-W

• Format - Memory: EEPROMs - Serial
• Memory Type: EEPROM
• Memory Size: 2K (256 x 8)
• Speed: 400kHz
• Interface: I²C, 2-Wire Serial
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

○Notes on write cycle continuous input
○Notes on page write cycle
○Write protect (WP) terminal
・Write protect (WP) function
S D A
L IN E
When WP terminal is set Vcc (H level), data rewrite of all address is prohibited. When it is set GND (L level), data rewrite of all
At extremely low voltage at power ON/OFF, by setting the WP terminal 'H', mistake write can be prevented.
During tWR, set the WP terminal always to 'L'. If it is set 'H', write is forcibly terminated.
address is enabled. Be sure to connect this terminal to Vcc or GND, or control it to H level or L level. Do not use it open.
SDA
LINE
S
T
A
R
T
List of numbers of page write
1 0
Number of pages
Product number
A D D R E S S
1
S L A V E
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.).
The above numbers are maximum bytes for respective types. Any bytes
below these can be written.
S
T
A
R
T
0
A 2
1 0
A 1
ADDRESS
A 0
SLAVE
1
W
W
R
E
R
T
I
/
0
A
C
K
P2
＊
W A
14
A D D R E S S (n )
P1
1 st W O R D
W A
13
P0
*1
W A
12
W
R
/
BR24S16-W
W A
11
W
R
T
E
I
C
A
K
16Byte
Fig.39
WA
7
Fig.38
ADDRESS（ｎ）
A
C
K
WORD
A D D R E S S (n )
2 n d W O R D
Page write cycle(BR24S32/64/128/256-W)
Page write cycle(BR24S16-W)
BR24S32-W
BR24S64-W
WA
0
32Byte
W A
0
C
A
K
A
C
K
D7
D 7
D A T A (n )
DATA(n)
BR24S128-W
BR24S256-W
D 0
64Byte
D0
A
C
K
A
C
K
24/32
D A TA (n+ 31 )
DATA(n+15)
*2
D 0
A
C
K
0Eh
O
For example, when it is started from address 0Eh,
therefore, increment is made as below,
0Eh→0Fh→00h→01h･･･, which please note.
* 0Eh･･･16 in hexadecimal, therefore, 00001110 becomes a binary
S
T
P
tW R (ma ximu m : 5 m s)
C o m m an d is n ot a ccep te d for
th is period .
D0
A t S TO P (stop bit)
w rite starts.
number.
WA7 ----- WA4 WA3
C
A
K
0
0
0
0
0
0
S
T
O
P
S
A
R
T
T
1 0 1 0
N e xt co m m a n d
○ Internal address increment
At STOP (stop bit)
write starts.
Page write mode (in the case of BR24S16-W)
-----
-----
-----
-----
-----
-----
Significant bit is fixed.
No digit up
tWR(maximum：5ms)
Command is not accepted for this
period.
*1 As for WA12, BR24S32-W becomes Don't care.
*2 As for BR24S128/256-W becomes (n+63).
S
T
A
R
T
Next command
1
0
0
0
0
0
0
As for WA13, BR24S32/64-W becomes Don't care.
As for WA14, BR24S32/64/128-W becomes Don't care.
0
1
0
0
0
0
1
1
0
WA2 WA1 WA0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
0
0
1
0
Increment