User's Manual

LE920 Hardware User Guide
1vv0301026 Rev.8 2015-01-03
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11. Audio Section Overview
The LE920 module support analog and digital audio interfaces.
11.1. Analog Audio
The LE920 module provides single analog audio path transmitting and receiving.
Please refer to the xE920_Audio_Settings_Application_Note, 80404NT10095A
WARNING:
LE920 Analog audio implementation uses an internal CODEC.
LE920 internal codec uses the same external LE920 digital Audio interface signals
Therefore, applications that are using analog audio, must make sure that the digital audio
interface shall be either not connected, or Hi-Z, or ‘input’ to Host application.
11.2. Digital Audio
LE920 can be connected to an external codec through the digital interface.
The product provides one Digital Audio Interface (DVI) on the following Pins:
PAD
Signal
I/O
Function
Type
COMMENT
D11
DVI_WA0
O
Digital Audio Interface (WA0)
B-PD
1.8V
PCM_SYNC
C8
DVI_RX
I
Digital Audio Interface (RX)
B-PD
1.8V
PCM_DIN
D9
DVI_TX
O
Digital Audio Interface (TX)
B-PD
1.8V
PCM_DOUT
C10
DVI_CLK
O
Digital Audio Interface (CLK)
B-PD
1.8V
PCM_CLK
LE920 DVI supports PCM master 2048khz short frame