ALC5642-VF
Datasheet
7.8. Analog Audio Output Port
The ALC5642 supports four type output ports:
SPO_L/R_P/N
The speaker output of ALC5642 is a stereo BTL output with Class-D type amplifier.
The power of speaker amplifier is an individual power pin and higher than AVDD. So the input and
output of speaker amplifier has a gain ratio to enlarge or reduce the income analog signal. The gain
ratio setting can be controlled by fbgain_clsd (MX-8D[15:12]).
The input source of the speaker output port can be selected from analog input, SPKVOL, DAC output
by setting MX-48/49.
The front stage of speaker output has gain control and volume control. For gain control, the range is
from 0dB to -9dB and controlled by MX-46/47. For volume control, the range is from +12dB to
-46.5dB with 1.5dB/step controlled by MX-01.
The pow_spo_voll (MX-66[15]) and pow_spo_volr (MX-66[14]) can be used to power on/off
SPKVOLL and SPKVOLR. The pow_clsd (MX-61[0]) can be used to power on/off SPO_L/R_P/N.
SPKVDDL
LP
SPOLP
Analog
Modulation
Gate Drive
SPKGND
SPKVDDL
LN
RP
SPOLN
Analog
Modulation
Gate Drive
Gate Drive
SPKGND
SPKVDDR
SPORP
Analog
Modulation
SPKGND
SPKVDDR
SPORN
LN
Analog
Modulation
Gate Drive
SPKGND
Figure 17. Stereo BTL Speaker Output
Multi-Channel Audio Hub/CODEC with embedded Voice
DSP and SounzRealTM Digital Sound Effect
29
Rev. 0.93
REALTEK [ Realtek Semiconductor Corp. ]
