External Codec Pcm Interface - Huawei MC509 Hardware Manual

HUAWEI MC509 CDMA Mini PCIe Module
Hardware Guide
Pin Pin Name
No.
The MC509 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.
Figure 3-11 Circuit diagram of the interface of the PCM (MC509 Mini PCIe module is
used as PCM master)

3.7.2 External Codec PCM Interface

PCM interface (2048 kHz clock)
Figure 3-12 PCM_SYNC timing
Issue 03 (2014-12-26)
Pad Description
Type
PCM_SYNC and PCM_CLK: Output when PCM is in master mode;

The PCM function of MC509 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 1.69
OH
Typ.(V) Max.(V)
- 2.9
24