Linkplay A31 - 10;100 M Ethernet Port; Connect the Module with RJ45; USB Host Port

Doc Title Wireless smart audio module
Number
WMB20150921
Version
1.
4
Document No.: WMB20150921 Page 13 of 21
VSWR 2 (Max)
Reflection loss -10dB (Max)
Connector I-PEX or populate directly
Table 2-5 LinkPlay WiFi Audio A31 external antenna parameters
2.5. 10/100M Ethernet Port
LinkPlay WiFi Audio A31 module provides 10/100Mbps Ethernet interface pins that could be used to connect with
Ethernet RJ45 socket. It has built-in transformer.
2.5.1. Connect the module with RJ45
To provide 10/100Mbps Ethernet functionality, you could connect the module with the RJ45 socket via a Ethernet
transformer. The detailed diagram is as follows:
Figure 2-4 The reference design of Ethernet
2.6. USB host port
LinkPlay WiFi Audio A31 module provides high speed USB2.0 host interface. To connect with USB port, the
reference design is shown below.
R100 75R
12
R95 75R
12
GND
U5
RJ-45X1P
1
2
3
6
4
5
7
8
CHGND
C84 0 ohm/SB
1 2
GND
C85 0 ohm/SB
1 2
WAN_C2
ETH_RXP
ETH_RXN
WAN_C1
ETH_TXP
ETH_TXN
MB4_P MB4_P
LA N P O R T1
MA4_P
CAP3 CMT4
CHGND
MA4_N
MB4_N
MA4_N
MA4_P
CMT4
MB4_N
C86
0.1uF
12
RX
TX
D X
U4
HN1674DG
1
3
5
7
16
14
13
12
10
4
R94 75R
12
C87 1000pF/2KV/NC
1 2