Audio Interfaces (J301/J302/J303); Digital Audio Codec Board Interface (J301) - Quectel M.2 EVB User Manual

The following figure is a reference circuit design for the USB Type-C device interface.
Module
USB_SS_TX_M
USB_SS_TX_P
USB_SS_RX_M
USB_SS_RX_P
USB_DP
USB_DM
NOTE
"*" means under development.
1.
1)
2. The USB interface of EM05 does not support voice over USB function.

4.4. Audio Interfaces (J301/J302/J303)

Quectel M.2 EVB provides one digital audio codec board interface (PCM) J301 and two analog audio
interfaces J302 and J303. This chapter gives a detailed introduction on these audio interfaces.

4.4.1. Digital Audio Codec Board Interface (J301)

The M.2 EVB supports the external digital audio codec of TLV320AIC3104. The codec circuit is assembled
on an independent small board which can be interconnected with EVB by the BTB connector J301.
The following figures show a reference design for the connection between digital audio codec board and
the EVB.
M.2_EVB_User_Guide
U301 HS3SS3220
TXN
TXP
RXN
RXP
R1 0R
R2 0R
Figure 10: USB Type-C Interface Circuit
C1 100nF
TX1+
C2 100nF
TX1-
C3 100nF
RX1+
C4 100nF
RX1-
C5 100nF
TX2+
C6 100nF
TX2-
C7 100nF
RX2+
C8 100nF
RX2-
CC1
CC2
ESD
LTE Module Series
M.2 EVB User Guide
USB Type-C
U701
TX1+
TX1-
RX1+
RX1-
TX2+
TX2-
RX2+
RX2-
CC1
CC2
USB_D+
USB_D-
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