BU9889GUL-W Rohm, BU9889GUL-W Datasheet - Page 9

• Manufacturer Part Number: BU9889GUL-W
• Description: WL-CSP EEPROM family I2C BUS
• Manufacturer: Rohm

© 2010 ROHM Co., Ltd. All rights reserved.
BU9889GUL-W
www.rohm.com
○Notes on page write cycle
○Internal address increment
○Write protect (WP) terminal
・Write protect (WP) function
Maximum page number is 16 bytes for this IC.
Any bytes below these can be written.
The page write cycle write time is 5ms at maximum for 16byte bulk write.
It does not stand 5ms at maximum × 16byte = 80ms(Max.).
Page write mode
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 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.
0Eh
* 0Eh･･･16 in hexadecimal, therefore, 00001110 becomes a binary number.
WA7 ----- WA4 WA3
For example, when it is started from address 0Eh,
therefore, increment is made as below,
0Eh→0Fh→00h→01h･･･, which please note.
0
0
0
0
0
0
-----
-----
-----
-----
-----
-----
Significant bit is fixed.
No digit up
0
0
0
0
0
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
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2010.01 - Rev.A
Technical Note