DS1881 데이터 시트보기 (PDF) - Maxim Integrated

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DS1881

Dual NV Audio Taper Digital Potentiometer

Maxim Integrated 

Dual NV Audio Taper Digital Potentiometer

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

CONFIGURATION REGISTER

Factory Default:

Memory Type:

87h

NV (EEPROM)

Register control the NV/volatile wiper setting, the zero-

crossing detection feature, and the potentiometer atten-

uation configuration.

1

0

X

X

X

V/NV

CONTROL

ZERO-

CROSSING

POT

CONFIG

b7

b6

b5

b4

b3

b2

b1

b0

bits 7, 6

bits 5, 4, 3

bit 2

bit 1

bit 0

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.

These bits have no function.

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).

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).

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).

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