Earphone Interface (J302) - Quectel M.2 EVB User Manual

Module
R
PCM_CLK
PCM_SYNC
PCM_OUT
PCM_IN
I2C_SCL
I2C_SDA
Figure 11: Reference Design for Connection between Codec Board and EVB

4.4.2. Earphone Interface (J302)

Audio interface J302 is designed for earphones. A reference circuit design for the interface is shown as
following figure.
M.2_EVB_User_Guide
BTB CON
BCLK
C
LRCK
DACDAT1
ADCDAT1
SCL
SDA
J301
VDD_EXT
Figure 12: Connection between Codec Board and EVB
BTB CON
TLV3104
MIC_BIAS
IN2P
IN2N
U101
HPO_L
HPO_R
LOUDL/P
LOUDR/N
J301
LTE Module Series
M.2 EVB User Guide
J303 MIC
1
4
6
J302
5
3
2
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