User's Guide
Revision 1.0
11/5/2013
Revision 1.0
Subject To Change without Notice
Parameter
TX output power
-
40
Transmit mode supply current
-
40
Active mode supply current
Standby mode supply current
Sleep mode supply current
4
Application Programming Interface
4.1 Serial Port
A half-duplex (0-
3.0V) TTL asynchronous serial port (UART) is the primary interface to the user equipment. The serial
port operates with the serial parameters of 9600bps, 8 data bits, no parity, 1 stop bit.
The RX data input and the RTS input
s are 5V tolerant. The TX data and CTS outputs are 0
RS232 input levels are not supported. RS232 data must be converted to TTL before being sent to the unit.
Each command from the DTE to the modem (STX) is sent in a serial packet. Upon receiving
answers to the DTE and, if applicable, executes the command.
In order to wake up the modem (STX) from sleep mode and to indicate the end of the serial packet, each serial packet
must be framed by activating RTS before the first byte
command.
Revision 1.0
STX3 Users Manual
Subject To Change without Notice
P a g e
Test Conditions
Min
40
-
85º C, Vcc=Vrf=3.3 volts, 50 ohm load
17.0
40
-
85º C, Vcc=Vrf=3.3
volts, 50 ohm load
315
25º C, Vcc = 3.3 volts
25º C, Vcc = 3.3 volts
25º C, Vcc = 3.3 volts
Application Programming Interface
3.0V) TTL asynchronous serial port (UART) is the primary interface to the user equipment. The serial
port operates with the serial parameters of 9600bps, 8 data bits, no parity, 1 stop bit.
s are 5V tolerant. The TX data and CTS outputs are 0
-
3.0V TTL.
RS232 input levels are not supported. RS232 data must be converted to TTL before being sent to the unit.
Each command from the DTE to the modem (STX) is sent in a serial packet. Upon receiving
the command, the modem
answers to the DTE and, if applicable, executes the command.
In order to wake up the modem (STX) from sleep mode and to indicate the end of the serial packet, each serial packet
must be framed by activating RTS before the first byte
of the command and deactivating RTS after the last byte of the
P a g e
| 11
Typ
Max
Unit
17.5
18.0
dB
325
350
mA
2.3
2.5
mA
12
50
uA
8
40
uA
3.0V) TTL asynchronous serial port (UART) is the primary interface to the user equipment. The serial
3.0V TTL.
RS232 input levels are not supported. RS232 data must be converted to TTL before being sent to the unit.
the command, the modem
In order to wake up the modem (STX) from sleep mode and to indicate the end of the serial packet, each serial packet
of the command and deactivating RTS after the last byte of the