User's Manual

L811-EA Module Hardware User Manual Page
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I2S2_CLK0
I2S_CLK
I2S2_WA0
I2S_LRCK
I2S2_RX
I2S_SDOUT
I2S2_TX
I2S_SDIN
Description:

I2S interface can be configured as master or slave mode.

It supports various audio sampling rates (48KHz, 44.1KHz, 32KHz, 24KHz, 22.5KHz, 16KHz, 12KHz,
11.025KHz and 8KHz).
5.8.2 PCM Mode Description
L811-EA
Signal Direction
Audio CODEC PCM Port
I2S2_CLK(PCM_CLK ,PCM clock signal)
PCM_CLK（PCM clock signal）
I2S2_WA(PCM_SYNC , PCM frame
synchronization signal)
PCM_SYNC（PCM frame
synchronization signal）
I2S2_RX(PCM_DIN , PCM data input)
PCM_DOUT（PCM data output）
I2S2_TX(PCM_DOUT , PCM data output)
PCM_DIN（PCM data input）
Note:

PCM port can be configured as master or slave mode.
 It supports short frame sync for 16, 32, 48, and 64 bit mode.

It supports burst and continuous transmission modes.

It supports clock length trigger for frame sync signal and rising/falling edge trigger for data
transmission.
 It supports various audio sampling rates (48KHz, 44.1KHz, 32KHz, 24KHz, 22.5KHz, 16KHz, 12KHz,
11.025KHz and 8KHz).
Note:
Because of the timing of I2S mode is simpler than PCM mode, it is recommended to use I2S mode for
audio transmission. For PCM mode, the audio quality issues caused by the PCM timing adjusting must be
avoided.
5.9 I2C Interface
L811-EA module supports one I2C interface, default configured as I2C master. The I2C master is used for
driving external I2C slave devices, such as audio codecs and so on.