Huawei MU709s-2 Hardware Manual page 19

HUAWEI MU709s-2 HSPA+ Mini PCIe Module
Hardware Guide
Table 3-6 Signals on the digital audio interface
Pin
Pin Name
No.
45 PCM_CLK
47 PCM_DOUT
49 PCM_DIN
51 PCM_SYNC
The MU709s-2 Mini PCIe module interface enables communication with an external
codec to support linear format.
Figure 3-7 Circuit diagram of the interface of the PCM (MU709s-2 Mini PCIe module is
used as PCM master)
Issue 02 (2014-09-18)
Pad
Description
Type
O PCM clock
O PCM I/F data output
I PCM I/F data input
O PCM interface sync
 PCM_SYNC: Output when PCM is in master mode;
 PCM_CLK: Output when PCM is in master mode;
 The PCM function of MU709s-2 Mini PCIe only supports master mode;
 It is recommended that a TVS be used on the related interface, to prevent electrostatic
discharge and protect integrated circuit (IC) components.
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Description of the Application Interfaces
Parameter
Min.(V)
V –0.3
OL
V 1.35
OH
V –0.3
OL
V 1.35
OH
V –0.3
IL
V 1.17
IH
V –0.3
OL
V 1.35
OH
Typ.(V) Max.(V)
0 0.45
1.8 2.1
0 0.45
1.8 2.1
0 0.63
1.8 2.1
0 0.45
1.8 2.1
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