BU9831 Datasheet, PDF (2/13 Pages) Rohm – Non-volatile electronic potentiometer

Memory ICs
•^{Block diagram}
CS
SK
Command decode
Control
7bit
Timing Counter
DIO
16bit
EEPROM
Array
Wiper
decoder
Write
Disable
High
voltage
generator
BU9831 / BU9831F
VH
Transistor
switch
Register
array
Power supply
VL
voltage detector
VW
•^{Pin assignments}
VCC
VH
VW
VL
8
7
6
5
BU9831
•^{Pin desoriptions}
Pin No.
Pin name
1
CS
2
SK
3
DIO
4
GND
5
VL
6
VW
7
VH
8
VCC
1
2
3
4
CS SK DIO GND
I/O
Function
I
Chip select input
I
Serial data clock input
I/O
Input / output of operating codes, addresses, and serial data
—
Reference voltage of 0V for all input / output
Resistance pin Resistance low-potential
Resistance pin Wiper
Resistance pin Resistance high-potential
—
Connection for power supply
2