PA5750 Datasheet, PDF (18/30 Pages) Protek Devices – Low Power Stereo Audio CODEC With Speaker and Headphone Amplifier.

ANALOG PRODUCTS DIVISION
PA5750
Low Power Stereo Audio CODEC
With Speaker and Headphone Amplifier.
6.3.4. Register26 – DAC Control 4, Default 1100 0000
Bit Name
Bit Description
Digital volume control attenuates the signal in 0.5dB increments from 0 to -96dB
00000000 – 0dB.
00000001 – -0.5dB
LDACVOL
7:0 00000010 - -1dB
……………….
11000000 - -96dB (default).
6.3.5. Register27 – DAC Control 5, Default 1100 0000
Bit Name
Bit Description
Digital volume control attenuates the signal in 0.5dB increments from 0 to -96dB
00000000 – 0dB.
00000001 – -0.5dB
RDACVOL
7:0 00000010 - -1dB
……………….
11000000 - -96dB (default).
6.3.6. Register28 – DAC Control 6, Default 0000 1000
Bit Name
Bit Description
00 – de-emphasis frequency disabled (default)
DeemphasisMode
(DEEMP)
7:6
01 – 32 kHz de-emphasis frequency in single speed mode.
10 – 44 kHz de-emphasis frequency in single speed mode.
11 – 48 kHz de-emphasis frequency in single speed mode.
DAC_invL
5
0 – normal DAC left channel output no phase inversion (default)
1 – normal DAC left channel output 180° phase inversion.
DAC_invR
4
0 – normal DAC right channel output no phase inversion (default)
1 – normal DAC right channel output 180° phase inversion.
ClickFree
3
0 – disable digital click free power up and down.
1 – enable digital click free power up and down (default).
6.3.7. Register29 – DAC Control 7, Default 0000 0110
Bit Name
Bit Description
ZeroL
7
0 – normal (default)
1 – set Left Channel DAC output all zero.
ZeroR
6
0 – normal (default)
1 – set Right Channel DAC output all zero.
Mono
5
0 – normal (default)
1 – mono (L+RE)/2 into DACL and DACR.
SE Strength, total 8 settings, L=L+(L-R)*a, R=R+(R-L)*a, where a is from 0 to 7/8
SE_Strength
4:2
000 – 0 (default)
…….
111 – 7/8
00 – Vpp set at 3.5V (0.7 modulation index) (default).
Vpp_scale
1:0
01 – Vpp set at 4.0V
10 – Vpp set at 3.0V
11 – Vpp set at 2.5V
6.3.8. Register30 – DAC Control 8, Default 0001 1111
Bit Name
Bit Description
Shelving_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}.
561 E Elliot Road.#175 Chandler, AZ 85225 Tel: [phone]. Fax: [phone].
18
95230 Rev.0. 04/09
www.protekanalog.com
Not for use in any life support systems.