Datasheet

DS1881

Dual NV Audio Taper Digital Potentiometer

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Configuration Register

If 10 is entered as the value of the two MSBs of the

Command Byte, then the Configuration Register is to

be modified. The three LSBs of the Configuration

crossing detection feature, and the potentiometer atten-

uation configuration.

CONFIGURATION REGISTER

Factory Default: 87h

Memory Type: NV (EEPROM)

1 0 X X X

V/NV

CONTROL

ZERO-

CROSSING

POT

CONFIG

b7 b6 b5 b4 b3 b2 b1 b0

bits 7, 6

Configuration Selection: When bit 7 is set to a 1 and bit 6 is set to a 0, the following configuration bits can be set

and stored in EEPROM.

bits 5, 4, 3 These bits have no function.

bit 2

Volatile/Nonvolatile Potentiometer Register Control Bit: A control bit that sets the potentiometer registers to be

either volatile or nonvolatile memory.

0 = Potentiometer registers are set to nonvolatile memory storage.

1 = Potentiometer registers are set to volatile memory storage. On power-up, the potentiometer wipers are in the

mute position (default).

bit 1

Zero-Crossing Detection Enable Bit: A bit used to enable and disable the zero-crossing functionality.

0 = Zero-crossing detection is disabled.

1 = Zero-crossing detection is enabled (default).

bit 0

Potentiometer Position Configuration: A control bit used to select the number of positions both potentiometers

have.

0 = Potentiometers have 63 positions and mute.

1 = Potentiometers have 33 positions and mute (default).