BU9891GUL-W Rohm, BU9891GUL-W Datasheet - Page 7

• Manufacturer Part Number: BU9891GUL-W
• Description: WL-CSP EEPROM family Microwire Bus
• Manufacturer: Rohm

●Block diagram
●Pin assignment and function
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BU9891GUL-W
www.rohm.com
Land No.
A1
A2
A3
B1
B2
B3
DO
SK
CS
DI
Pin Name
Command decode
Control
Clock generation
Command
register
GND
Vcc
DO
SK
CS
Dummy bit
DI
OUTPUT
INPUT
INPUT
INPUT
I / O
-
-
Fig.31 Pin assignment diagram
B
A
Fig.30 Block diagram
Address
buffer
Data
register
Start Bit, Op.code, Address, Serial Data Input
Serial Data Output, Ready/Busy Status Output
Power Supply
Serial Data Clock Input
Grand (0V)
Chip Select
B1
A1
1
(SK)
(DI)
Write
prohibition
7/17
B2
A2
Power source voltage detection
2
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(GND)
(DO)
16bit
8bit
B3
A3
3
(Vcc)
(CS)
Address
decoder
R/W
amplifier
High voltage occurrence
Function
16bit
8bit
EEPROM
4,096 bit
Technical Note
2010.07 - Rev.A
Datasheet
pdf
-
http://www.DataSheet4U.net/