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HUAWEI MU509-65 HSDPA LGA Module
Hardware Guide
Figure 3-22 Circuit diagram of the interface of the second audio channel
3.8.2 Digital Audio
The MU509-65 provides one digital audio channels. Table 3-12 lists the signals on the
digital audio interface.
Table 3-12 Signals on the digital audio interface
Pin No. Pin Name
5
PCM_SYNC
6
PCM_DIN
7
PCM_DOUT
8
PCM_CLK
The MU509-65 PCM interface enables communication with an external codec to
support linear and μ-law format. The PCM_SYNC runs at 8 kHz with a 50% duty
cycle.
Issue 01 (2016-04-08)
SPKR_OUT_P
SPKR_OUT_N
Module
(DCE)
MIC2_P
MIC2_N
It is recommended that a TVS be used on the related interface, to prevent electrostatic
discharge and protect integrated circuit (IC) components.
Pad
Description
Type
O
PCM interface sync
I
PCM I/F data in
O
PCM I/F data out
O
PCM interface clock
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Description of the Application Interfaces
ferrite bead
ferrite bead
33 pF
100 pF
33 pF
33 pF
Parameter
V
OH
V
OL
V
IH
V
IL
V
OH
V
OL
V
OH
V
OL
100 pF
33 pF
ferrite bead
ferrite bead
Min.
Typ.
Max.
(V)
(V)
(V)
2.15
-
2.6
0
-
0.45
1.69
-
2.9
–0.3
-
0.91
2.15
-
2.6
0
-
0.45
2.15
-
2.6
0
-
0.45
+
-
Speaker
+
-
MIC
40
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