7
6
6.1.2 DC Power Input Specifications
The DC power requirements for the 9522A are summarized in Table 5
below. Note that these requirements apply to DC power measured at the
9522A multi-interface connector input.
Table 5: DC Power Input Specifications
6.2 Control/Digital Audio (DPL bus) Interface
6.2.1 Control/Digital Audio Interface Signal
Descriptions
The control/digital audio interface enables peripherals such as handsets
and SIM card readers to be interfaced to the 9522A. The interface
utilizes an Iridium proprietary communication bus not detailed in this fact
sheet. Details can be made available after appropriate Non-disclosure
Agreements and /or License Agreements are executed.
6.3 RS232 Data Interface
6.3.1 RS232 Data Signal Descriptions
The RS232 data interface is comprised of eight standard RS232 data,
control, and status signals plus a ground level signal reference. This
interface allows a connected Data Terminal Equipment (DTE) to utilize
the 9522A’s modem functionality via AT command control. A 3-wire
RS232 Data minimal interface may also be implemented however the 9
wire interface offers better control and is the recommended
implementation.
6.3.2 Autobaud
The 9522A default is for autobaud to be enabled. Autobaud will occur on
the following characters ‘a’, ‘A’, CR (carriage return). Autobaud will also
occur on the escape sequence character, provided this is an odd
number character. Normally this is set to ‘+’ in register S2 see AT
Command Reference for details.
6.4 Analog Audio Interface
6.4.1 Analog Audio Interface Signal Descriptions
The analog audio interface is comprised of the analog audio input and
output signals referenced to the 0V signal ground as summarized in
Table 6 below.
Table 6: Analog Audio Interface Signal Descriptions
6.5 SIM Interface
An integrated SIM chip reader is provided on the 9522A. An external
SIM card reader may also be interfaced as a peripheral to the 9522A via
the DPL bus (control/audio interface). A SIM card in the external reader
will take precedence over the SIM chip in the integrated connector when
both are present.
Parameter
Value
Main Input Voltage - Range
+4.0 VDC to +4.8 VDC
Main Input Voltage – Nominal
4.4VDC
Main Input Voltage – Ripple
40 mVpp
Peak Input Current (maximum)
2.5 A @ 4.4 VDC
Main Input Active Power (average)
2200 mW
Main Input Standby Power (average)
570 mW
Signal Name
Signal Description
MIC_AUD (pin 15)
Analog audio input to 9522A
SPKR_AUD (pin 5)
Analog audio output from 9522A
0V (pin 14, 23 and 25)
Signal ground
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