Quectel UC20

UMTS/HSPA/LTE Module Series
UMTS&LTE EVB User Guide
UMTS&LTE_EVB_User_Guide Confidential / Released 17 / 32
HPO_L
IN2N
IN2P
75pF
GND GND
AGND
Close to Socket
Differential layout
15pF
10pF
33pF
GND
GND
AGND
Codec
ALC5616
10uF
Close to Socket
AGND
ESD
ESD
Audio Jack
22uF
U501
J601
2
4
5
3
1
HPO_R
10pF
33pF
22uF
6
Figure 10: Earphone Circuit
Figure 11: Pin Assignment of J601
Table 5: Pin Assignment of J601
J404 Pin
Pin Name
Function
1
MICP
Positive microphone input
2
AGND
Dedicated GND for Audio
Quectel
Confidential