User's Guide

LE910Cx Hardware User Guide
1VV0301298 Rev. 1.04 - 2017-05-25
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8.6. Audio Interface
The LE910Cx module support digital audio interface.
8.6.1. Digital Audio
The LE910Cx module can be connected to an external codec through the digital interface.
The product provides a single Digital Audio Interface (DVI) on the following pins:
Table 30: Digital Audio Interface (DVI) Signals
PAD Signal I/O Function Type COMMENT
B9 DVI_WAO O Digital Audio Interface (WAO) B-PD 1.8V PCM_SYNC
B6 DVI_RX I Digital Audio Interface (RX) B-PD 1.8V PCM_DIN
B7 DVI_TX O Digital Audio Interface (TX) B-PD 1.8V PCM_DOUT
B8 DVI_CLK O Digital Audio Interface (CLK) B-PD 1.8V PCM_CLK
B12 REF_CLK O Audio Master Clock B-PD 1.8V I2S_MCLK
LE910Cx DVI has the following characteristics:
• PCM Master mode using short or long frame sync modes
• 16 bit linear PCM format
• PCM clock rates of 256 kHz, 512 kHz, 1024 kHz and 2048 kHz (Default)
• Frame size of 8, 16, 32, 64, 128 & 256 bits per frame
• Sample rates of 8 kHz and 16 kHz
In addition to the DVI port, the LE910Cx module provides a master clock signal (REF_CLK on Pin
B12) which can either provide a reference clock to an external codec or form an I2S interface
together with the DVI port where the REF_CLK acts as the I2S_MCLK.
The REF_CLK default frequency is 12.288 MHz.
When using the DVI with REF_CLK as an I2S interface, 12.288 MHz is 256 x fs (where fs = 48 kHz)