BR24L02-W Rohm Semiconductor, BR24L02-W Datasheet - Page 9

• 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
List of numbers of page write
In the case BR24L02-W, 1 page=8bytes, but the page
write cycle write time is 5ms at maximum for 8byte bulk write.
It does not stand 5ms at maximum × 8byte=40ms(Max.).
The above numbers are maximum bytes for respective types.
Any bytes below these can be written.
Number of
・Write protect (WP) function
Product
number
SDA
LINE
Pages
When WP terminal is set Vcc (H level), data rewrite of all addresses is prohibited. When it is set GND (L level), data rewrite
of all 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.
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.
Note)
Fig.42 Difference of each type of slave address
A
R
S
T
T
1 0
ADDRESS
1 0
BR24L01A-W
Note)
BR24L02-W
SLAVE
1
0
8Byte
A2
1
A1
A0
0
W
R
/
W
R
T
*1 *2 *3
E
A 2
I
A
C
K
Fig.41 Page write cycle
WA
*1
7
A 1
ADDRESS（ｎ）
BR24L04-W
BR24L08-W
BR24L16-W
A 0
WORD
16Byte
WA
0
A
C
K
D7
BR24L32-W
BR24L64-W
DATA(n)
32Byte
D0
C
A
K
9/32
*1 BR24L01A-W becomes Don’t care.
*2 BR24L04-W, BR24L08-W, and BR24L16-W become (n+15).
*3 BR24L32-W and BR24L64-W become (n+31).
DATA(n+7)
*1 In BR24L16-W, A2 becomes P2.
*2 In BR24L08-W, BR24L16-W, A1 becomes P1.
*3 In BR24L04-W, A0 becomes PS, and in BR24L08-W and
06h
in BR24L16-W, A0 becomes P0.
○Internal address increment
Page write mode (in the case of BR24L02-W)
For example, when it is started from address 06h,
therefore, increment is made as below,
06h → 07h → 00h → 01h ---, which please note.
＊
*2
*3
WA7 ----- WA4 WA3
D0
0
0
0
0
0
0
binary number.
06h･･･06 in hexadecimal, therefore, 00000110 becomes a
A
C
K
S
T
O
P
-----
-----
-----
-----
-----
-----
At STOP (stop bit),
write starts.
tWR(maximum : 5ms)
Command is not accepted for this period.
S
T
A
R
T
Next command
Significant bit is fixed.
No digit up
0
0
0
0
0
0
1
0
1
0
0
0
0
0
0
0
WA2 WA1 WA0
0
0
0
1
1
0
0
0
1
1
1
0
0
1
0
0
1
0
Increment