Datasheet

Detailed Description
The DS3930 contains six NV potentiometers with 64
bytes of NV user memory (EEPROM), and four pro-
grammable NV I/O pins. Figure 1 is a functional dia-
gram of the DS3930.
Potentiometers
The six potentiometers share a common low side and
are separated into two groups of three potentiometers,
each group sharing a common high side. The six 256-
position potentiometers are controllable using six 8-bit
EEPROM registers through the 2-wire interface.
DS3930
Hex Nonvolatile Potentiometer with
I/O and Memory
_____________________________________________________________________ 7
2-WIRE
INTERFACE
V
CC
A0
SDA
SCL
A1
A2
GND
POT0
50kΩ
50kΩ
50kΩ
50kΩ
50kΩ
50kΩ
POT1
POT2
POT3
POT4
POT5
W
0
W
1
W
2
W
3
W
4
W
5
HI
0-2
LO
0-5
HI
3-5
I/O
0
I/O
1
I/O
2
I/O
3
I/O CELL X 4
64 BYTES OF
EEPROM
RESERVED
POT0 CONTROL
I/O CONTROL
I/O STATE
RESERVED
FFh
F8h
F7h
F6h
F5h
POT1 CONTROL
POT2 CONTROL
POT3 CONTROL
POT4 CONTROL
POT5 CONTROL
F1h
F2h
F3h
F4h
EFh
F0h
00h
3Fh
40h
8
8
8
8
8
8
8
4
EEPROM
DS3930
Figure 1. DS3930 Functional Diagram