LE940B6 HW User Guide
Rev. 2.02
Page 82 of 111
2020-01-10
Audio Interface
The LE940B6 module supports analog and digital audio interfaces.
8.5.1.
Analog Audio
The LE940B6 module provides an analog audio interface, a single differential input for the
audio to be transmitted (Uplink), and a balanced output for the received audio (Downlink).
The analog interface is on the following pins:
Table 30: Analog Audio Signals
PAD
Signal
I/O
Function
Type
Comments
B5
AO Earphone signal output, phase +
Audio
A4
EAR1_MT-
AO Earphone signal output, phase -
Audio
B3
AI
Microphone signal input, phase +
Audio
A2
MIC1_MT-
AI
Microphone signal input, phase -
Audio
G6
MICBIAS
AO Microphone bias is 1.9~2.2V
Power
An application note will be prepared for detailed audio settings.
8.5.2.
Digital Audio
The LE940B6 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 31: Digital Audio Interface (DVI) Signals
PAD
Signal
I/O
Function
Type
Comments
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
Provided
to
Dekra
under
NDA
Distribution
is
Prohibited
except
for
Dekra
employees
with
a Need
to
know
