Description Of I2S Interface; Description Of Pcm Interface - Fibocom L-831-EA User Manual

The description of I2S signal as listed below:
Pin#
Name
20 I2S2_CLK
28 I2S2_WA0
22 I2S2_TX
24 I2S2_RX

5.6.1 Description of I2S Interface

L831-EA
I2S_CLK
I2S_WA
I2S_RX
I2S_TX
Note:
 I2S interfaces can be configured to master or slave modes .
 It supports various audio sample rates (48KHz, 44.1KHz, 32KHz, 24KHz, 22.5KHz, 16KHz, 12KHz,
11.025KHz, 8KHz).

5.6.2 Description of PCM Interface

L831-EA
I2S_CLK0(PCM_CLK， PCM clock signal)
I2S_WA0(PCM_SYNC，PCM frame
synchronization signal)
I2S_RX(PCM_DIN，PCM data input)
I2S_TX(PCM_DOUT，PCM data output)
Description:
 PCM interfaces can be configured to master or slave modes.
 Supports short frame synchronization under16 bit, 32bit, 48bit and 64bit modes.
 Supports sending data in burst modes and continuous modes.
 Supports clock length of frame synchronization signal and rising edge/ falling edge trigger
L831-EA Module Hardware User Manual
Type Description
O Bit clock
O Left- right clock (LRCK)
O Serial data output
I Serial data input
Signal Direction Audio CODEC I2S Port
I2S_CLK
I2S_LRCK
I2S_SDOUT
I2S_SDIN
Signal Direction Audio CODEC PCM Port
PCM_CLK (PCM clock signal)
PCM_SYNC (PCM frame
synchronization signal )
PCM_DOUT (PCM data output)
PCM_DIN (PCM data input)
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