BU9844GUL-W Datasheet, PDF (4/13 Pages) Rohm – Silicon Monolithic Integrated Circuit

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◇BLOCK DIAGRAM
VCC
GND
16kbit EEPROM ARRAY
11bit
8bit
ADDRESS
SLAVE・WORD
DATA
DECODER 11bit ADDRESS REGISTER
REGISTER
WP
START
STOP
A2
CONTROL LOGIC
ACK
HIGH VOLTAGE GEN.
Vcc LEVEL DETECT
◇PIN CONFIGURATION
Fig.-2 BLOCK DIAGRAM
A2=Don’t Use
SCL
SDA
C _C1
C2
B B1
A A1
B2
Index post
A2
1
2
◇PIN NAME
Land No.
Fig.-3 BU9844GUL-W (bottom view)
PIN NAME
I/O
FUNCTIONS
A1
VＣＣ
－
Power Supply
A2
A2
IN
Out of Use (Vcc or GND or OPEN)
B1
WP
IN
Write Protect Input
B2
GND
IN
Ground （0V）
C1
SCL
IN
Serial Clock Input
Slave and Word Address,
C2
SDA
IN/OUT
Serial Data Input, Serial Data Output *1
*1 An open drain output requires a pull-up resistor.
REV. B