ANALOG PRODUCTS DIVISION

561 E. Elliot Road #175 Chandler, AZ 85225 Tel: (480) 539-2900. Fax: (480) 747-1715

www.protekanalog.com

PA5155

Low Power Stereo Audio CODEC

With Headphone Amplifier

95244 Rev.0. 01/10

NOT FOR USE IN LIFE SUPPORT SYSTEMS

DACLMU

2

1

– left DAC mute (default)

0

– left DAC not mute

DACRMU

0

1

– right DAC mute (default)

0

– right DAC not mute

Register 15

– DAC Control 2, Default 1100 0100

Bit Name

Bit

Description

AUTOMUTE

7

Auto mute function: long period of zero inputs (8k audio samples) will mute the analog output. Any

single non-zero input will un-mute. It is done per channel based.

0

– disable

1

– enable (default)

CLICKFREE

6

0

– disable digital click free power up and down

1

– enable digital click free power up and down (default)

VPPSCALE

5:4

Reserved

DACLRBOTH

3

1

– enable simultaneous load of DACLVOL and DACRVOL

0

– disable simultaneous load (default)

DACSOFTRAMP

2

1

– enable DAC soft ramp at mute and volume change (default)

0

– disable

DACRAMPRATE

1:0

These bits define DAC gain control ramp rate

00

– 0.5 dB per 4 LRCKs (default)

01

– 0.5 dB per 8 LRCKs

10

– 0.5 dB per 16 LRCKs

11

– 0.5 dB per 32 LRCKs

Register 16

– DAC Control 3, Default 0000 1000

Bit Name

Bit

Description

DACINVL

5

0

– DAC left channel output no phase inversion (default)

1

– DAC left channel output 180 degree phase inversion

DACINVR

4

0

– DAC right channel output no phase inversion (default)

1

– DAC right output 180 degree phase inversion

DACTOEN

3

Reserved

DACDAT

2

0

– disable DAC data 6 dB attenuate

1

– -6 dB enable

Register 17

– DAC Control 4, Default 0000 0000

Bit Name

Bit

Description

DACZEROL

5

0

– normal (default)

1

– set left channel DAC output all zero

DACZEROR

4

0

– normal (default)

1

– set right channel DAC output all zero

DACMONO

3

0

– stereo (default), and enable SE function

1

– mono ((L+R)/2) into DACL and DACR, and disable SE function

DACSE

2:0

Stereo enhancement gain

000

– 0 (default)

001

– 1/8

…

111

– 7/8

Register 18

– SHELVING1_A[29:24], Default 0001 1111

Bit Name

Bit

Description

SHEV1_A[29:24]

5:0

30-bit a coefficient for shelving filter; Default value is {5'h0f, 5'h1f, 5'h0f, 5'h1f, 5'h0f, 5'h1f}

Register 19

– SHELVING1_A[23:16], Default 1111 0111

Bit Name

Bit

Description

SHEV1_A[23:16]

7:0

30-bit a coefficient for shelving filter; Default value is {5'h0f, 5'h1f, 5'h0f, 5'h1f, 5'h0f, 5'h1f}