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Revision 1.11
58 - 91
AS3543 3v2
Data Sheet - R e g i s t e r D e f i n i t i o n
Table 44. OUT_R Register
Name
Base
Default
OUT_R
2-wire serial
00h
Offset: 02h
Right HP/Line Output Register
Configures MUX_C and the audio gain from MUX_C output to HPR/LOUTR output
and switches between the headphone and line output.
This register is reset when the block is disabled in AudioSet1 register (14h) or at a
AVDD27-POR. The register cannot be written when the block is disabled.
Bit
Bit Name
Default
Access
Bit Description
7
LOUT
0
R/W
Switches between headphone and line output
00: headphone enabled
01: line out enabled
6:5
MUX_C<1:0>
00
R/W
Multiplexes the analog audio inputs to MUX_C output for
HPR/L and LOUTR/L
00: Mixer: ΣR to HPR/LOUTR and ΣL to HPL/LOUTL
01: DAC direct : (N19/ N22), DAC gain stage and mixer are
bypassed
10: LineIn direct (N10/N17)
11: Mic direct (N12/N13)
4:0
OUTR_VOL<4:0>
00000
R/W
volume settings for right headphone/line output, adjustable in
32 steps @ 1.5dB; gain from MUX_C to HPR/LOUTR
11111: 6 dB gain
11110: 4.5 dB gain
..
00001: -39 dB gain
00000: -40.5 dB gain
Table 45. OUT_L Register
Name
Base
Default
OUT_L
2-wire serial
00h
Offset: 03h
Left HP/Line Output Register
Configures the audio gain from MUX_C output to HPL/LOUTL output and controls
MUTE switch K as well as on/off of the stage.
This register is reset when the stage is disabled in AudioSet1 register (14h) or at a
AVDD27-POR. The register cannot be written when the block is disabled
Bit
Bit Name
Default
Access
Bit Description
7
MUTE_K_ON
0
R/W
Control of MUTE switch K
0: HP/line output set to mute
1: normal operation
6
STAGE_ON
0
R/W
0: HP/line stage not powered
1: normal operation
5
HPDET_ON
0
R/W
Enables the detection when a headset gets connected. HPCM
is used as a sense pin and is biased to 150mV
0: no headphone detection
1: enable headphone detection
4:0
OUTL_VOL<4:0>
00000
R/W
volume settings for left headphone/line output, adjustable in
32 steps @ 1.5dB; gain from MUX_C to HPL/LOUTRL
11111: 6 dB gain
11110: 4.5 dB gain
..
00001: -39 dB gain
00000: -40.5 dB gain
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