Product Info

LTE Standard Module Series

EC25 Mini PCIe Hardware Design

EC25_Mini_PCIe_Hardware_Design

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Figure 9: Timing in Auxiliary Mode

Clock and mode can be configured by AT command, and the default configuration is master mode using

short frame synchronization format with 2048kHz PCM_CLK and 8kHz PCM_SYNC. In addition, EC25

Mini PCIe’s firmware has integrated the configuration on some PCM codec’s application with I2C interface.

Please refer to document [2] for details about AT+QDAI command.

The following figure shows a reference design of PCM interface with an external codec IC.

Figure 10: Reference Circuit of PCM Application with Audio Codec

Digital audio (PCM) function is only supported on Telematics version.

NOTE