H330SS LGA Module Hardware User Manual Page 31 of 38
5.6.4
USIM Hot Plug
H330S supports SIM hot plug.
5.6.4.1
Hardware Connection
SIM hot plug function interacts with USIM_CD signal.
When no SIM card, USIM_CD is high level; insert SIM, USIM_CD is low level.
In reference design USIM_CD connect U3 Pin8 (SW2), Pin7 (SW1) connect GND.
When no SIM card, SW2 is high level; Insert SIM, SW2 connect SW1,USIM_CD is pulled down
5.6.4.2
Software Design
“+MSMPD” AT command defines the SIM card status detection feature.
When set AT+MSMPD=0, the SIM detected feature deactivated. Module does not detect USIM_CD signal.
When set AT+MSMPD=1, the SIM detected feature activated. USIM_CD pin can test whether SIM card is onsite
or not.
SIM_CD is Low level, SIM card is onsite, and module registers the network automatically.
SIM_CD is High level or not connected, SIM card is offsite and module drops out the network.
Note: The +MSMPD default value is “0”.
5.7
Analog Audio
5.7.1
Audio Interface Signal Description
The H330S audio interface supports two channel audio signals input and two channel audio signal output.
Pin#
Pin Name
I/O
Description
13
AUXO+
O
Audio channel2
14
AUXO-
O
Audio channel2 output -
15
EAR-
O
Audio channel1 earphone signal output-
16
EAR+
O
Audio channel1 earphone signal
17
MIC+
I
Audio channel1 MIC signal input+
18
MIC-
I
Audio channel1 MIC signal input-
19
AUXI-
I
Audio channel2 MIC signal input -
20
AUXI+
I
Audio channel2 MIC signal input +
21
AGND
GND
Audio GND
22
VSPK
I
Audio codec speaker part power supply, connect to VBAT
