User manual

MTX-HSPA-PH8-P+G UMTS-HSPA terminal modem http://www.matrix.es
MTX-HSPA-PH8-P+G User Manual V.1.0 Pag. 18
Preliminary. Subject to change without prior notice
3.3 Mini USB Connector
The USB 2.0 interface allows the connectivity to all relevant PCs and control boards in office and industrial
environments. The USB interface is a USB 2.0 full speed (12Mbit/s) interface for AT-C modem functionality
between the MTX-HSPA-PH8-P+G Terminal and e.g. a PC.
It can be operated on a USB 2.0 Full Speed or High Speed root hub (a PC host), but not on a generic USB
2.0 High Speed hub which translates High Speed (480 Mbit/s/) to Full Speed (12 Mbit/s).
The USB I/O-pins are capable of driving the signal at min 3.0V. They are 5V I/O compliant. To properly
connect the module’s USB interface to the host a USB 2.0 compatible connector is required. Furthermore,
the USB modem driver delivered with MTX-HSPA-PH8-P+G must be installed as described below.
The USB host is responsible for supplying, across the VUSB_IN line, power to the module’s USB interface
but not to other MTX-HSPA-PH8-P+G interfaces. This is because the MTX-HSPA-PH8-P+G is designed as a
self powered device compliant with the “Universal Serial Bus Specification Revision 2.0”.
It is mandatory to use an external power supply for the MTX-HSPA-PH8-P+G. See section 3.1.
3.4 Serial Interface ASC0
MTX-PH8+PLUS offers an 8-wire unbalanced, asynchronous modem interface ASC0 conforming to ITU-T
V.24 protocol DCE signalling.
The MTX-HSPA-PH8-P+G is designed for use as a DCE. Based on the conventions for DCE-DTE
connections, it communicates with the customer application (DTE) using the following signals:
• Port TXD @ application sends data to the module’s TXD0 signal line.
• Port RXD @ application receives data from the module’s RXD0 signal line.
Features:
• Includes the data lines TXD0 and RXD0, the status lines RTS0 and CTS0 and also the modem control
lines DTR0, DSR0, DCD0 and RING0.
• ASC0 is designed for controlling GSM/UMTS voice calls, transferring data and for controlling the module
with AT commands.
• Full multiplexing capability allows the interface to be partitioned into virtual channels.
• The RING0 signal serves to indicate incoming calls and other types of URCs (Unsolicited Result Code). It
can also be used to send pulses to the host application, for example to wake up the application from
power saving state. See [1] for details on how to configure the RING0 line by AT^SCFG.
• Configured for 8 data bits, no parity and 1 stop bit.
• ASC0 can be operated at fixed bit rates from 9600bps up to 921600bps.
• Supports RTS0/CTS0 hardware flow control.
• Wakes up from SLEEP mode by RTS0 activation (high to low transition).