Serial Data Interface; 9-Wire And 3-Wire Operation - Iridium 9602 Development Manual

Iridium Communications Inc.
9602 SBD Transceiver Product Developers Guide
Revision 5`
Figure 6 9602/9602N Typical Supply Current Profile

3.3 Serial Data Interface

The Serial data interface is used to both command the 9602/9602N and transfer user data to and from the
Transceiver. The 9602/9602N presents a 9-wire data port to the FA (Field Application), where the interface is
at 3.3V digital signal levels. With respect to this interface, the 9602/9602N behaves as a DCE (Data
Communication Equipment), and the FA behaves as a DTE (Data Terminal Equipment).
The terms "FA" and "DTE" are used interchangeably throughout this document; similarly for the terms "9602"
and "DCE". Autobaud is not supported in 9602/9602N SBD Transceiver. The baud rate can be set via the
AT+IPR command. The default rate is 19200 bps.
See the ISU AT Command Reference for more information.

3.3.1 9-Wire and 3-Wire Operation

By default, the serial interface operates as a 9-wire connection. Table 10 describes each of the signals, where
"input" means an input to the 9602/9602N, and "output" means an output from the 9602/9602N SBD
Transceiver.
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