Wavecom WMOi3 User Manual page 6

The following table describes the electrical characteristics of the interface.
Some signals require particular connections and
characters.
Pin # Pin # Pin # Pin # Name Name Name Name
1 GND
2 GND
3 +5V
4 +5V
5 CT109/DCD
6 GND
7 GPIO2
8 SPK2N
9 CT125/RI
10 SPK2P
11 GPIO1
12 SPK1P
13 CT106/CTS
14 SPK1N
15 ON/~OFF
16 MIC2P
17 AUXV0
18 MIC2N
19 ~RST ~RST
~RST ~RST
20 MIC1P
21 GND GND GND GND
22 MIC1N
23 BOOT BOOT BOOT BOOT
24 GND
25 CT103/TX CT103/TX CT103/TX CT103/TX
26 GPIO0
27 CT107/DSR
28 CT104/RX
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I/O I/O I/O I/O I/O type I/O type I/O type I/O type
I Supply
I Supply
O CMOS/2X
I/O CMOS/2X
O Analog
O CMOS/2X
O Analog
I/O CMOS/2X
O Analog
O 1X
O Analog
I
I Analog
I Analog
I Analog
I
I Analog
I
I Analog
I
I
I/O CMOS/2X
O 1X
O 1X
WMOi3 integrated Modem
are specified in bold
Description Description Description Description
GROUND
GROUND
RS232-Data Carrier
Detect
GROUND
General Purpose I/O
Speaker2 negative
output
RS232-Ring Indicator
Speaker 2 positive
output
General Purpose I/O
Speaker 1 positive
output
RS232 interface Clear
To Send
Speaker 1 negative
output
Power ON/OFF control
Microphone 2 positive
input
Auxiliary ADC input
Microphone 2 negative
input
Reset active low
Microphone 1 positive
input
Ground
Microphone 1 negative
input
BOOT
GROUND
RS232 interface -
Transmit
General Purpose I/O
RS232 interface
Data Set Ready
RS232 interface –
Receive
Comment Comment Comment Comment
High current
High current
High current
High current
High current
Open Collector Open Collector
Open Collector Open Collector
Open Collector Open Collector Open Collector Open Collector
High current
Pull up to VCC Pull up to VCC Pull up to VCC Pull up to VCC
with 100KΩ Ω Ω Ω
with 100K
with 100K with 100K
when not used when not used
when not used when not used
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