SIM340 Hardware Design
3.9.2 Microphone interfaces configuration
10pF
33pF
33pF
33pF
Close to Microphone
MICxP
MICxN
GND
GND
Differential layout
AGND
MODUL
E
Electret
Microphone
GND
GND
10pF
10pF
GND
GND
ESD
ANTI
ESD
ANTI
AGND
Figure 24: Microphone interface configuration
3.9.3 Earphone interface configuration
1
2
4
3
Amphenol
9001-8905-050
MOD
U
LE
SPK2P
MIC2N
MIC2P
1uF
10R
68R
33pF
GND
GND
GND
GND
AGND
Close to MODULE
Close to Socket
Differential
layout
33pF
33pF
33pF
AGND
33pF
10pF
GND
GND
GND
GND
AGND
Figure 25:
Earphone interface configuration
SIM340_HD_V3.09
18.03.2009
41
Содержание SimCom SIM340
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