WM8816 데이터 시트보기 (PDF) - Wolfson Microelectronics plc

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WM8816

Stereo Digital Volume Control

Wolfson Microelectronics plc 

WM8816

REGISTER MAP

REGISTER

Peak Detector Status

R4

ADDRESS BYTE BITS

76543210

X 1 0 1 1 R/W X X

Peak Detector

Reference

R3

X 1 1 0 0 R/W X X

Left Channel Gain

R2

X 1 1 0 1 R/W X X

Right Channel Gain

R1

X 1 1 1 0 R/W X X

Both Channel Gains

R5

X 1 0 0 1WX X

Table 1 Register Map Description

Product Preview

DATA BYTE

MSB…LSB

Function

Output code

00000000

00000001

00000010

00000011

No overload

Right overload

Left overload

Both overload

Input code

11111111

11111110

11111101

:

00000010

00000001

00000000

DAC output

255/256 × 18V

254/256 × 18V

253/256 × 18V

:

2/256 × 18V

1/256 × 18V

AGND

Input code

11111111

11111110

11111101

:

11100000

00000010

00000001

00000000

Gain dB

+15.5

+15.0

+14.5

:

0.0

-111.0

-111.5

mute

Input code

11111111

11111110

11111101

:

11100000

00000010

00000001

00000000

Gain dB

+15.5

+15.0

+14.5

:

0.0

-111.0

-111.5

mute

Write to both gain registers

Notes:

1. Address bit 2 is the read / write bit (1 for read, 0 for write).

2. X represents ‘do not care’ entries. Set to 1 for minimum power consumption.

3. All registers are set to their default value (all zeros) during power-on reset, except R3 which is set to 255.

w

Rev 1.5 October 2004

8

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