There are three serial connectors and a power connector on the end of each interface board, as shown in Figure 8.4.4.
The RJ-45 connector provides an RS232 interface to the DNT90MP’s main serial port. The USB connector provides an
optional interface to the radio’s main serial port. The RJ-11 connector provides an RS232 interface to the radio’s optional
diagnostic port. The DNT90M Demo utility program runs on the radio’s main port.
Figure 8.4.4
Many desktop PCs have a built-in serial port capable of operation at 9600 bps. The kit can be run satisfactorily at the
9600 bps data rate, but not at its fastest throughput. Use the RJ-45 to DB-9F cable assemblies for serial port operation.
Optionally, the kit development boards can be run from USB ports. Plugging in the USB cable automatically switches op-
eration from the RJ-45 connector. The USB interface is based on an FT232RL serial-to-USB converter IC manufactured
by FTDI. The FT232RL driver files are located in the i386 and AMD64 folders on the kit CD, and the latest version of the
drivers can downloaded from the FTDI website, www.ftdichip.com. The drivers create a virtual COM port on the PC. Pow-
er the Base using one of the supplied wall-plug power supplies. Next connect the Base to the PC with a USB cable. The
PC will find the new USB hardware and open a driver installation dialog box. Enter the letter of the drive holding the kit CD
and click
Continue
. The installation dialog will run
twice
to complete the FT232R driver installation.
8.5
DNT90M Utility Program
The DNT90M utility program requires only one PC for initial kit operation and sensor applications (ADC, DAC and digital
I/O). Two serial/USB ports are required for bidirectional serial communications. Section 8.6 below covers using the
DNT90M Demo utility program for initial kit operation and familiarization. Section 8.6.1 covers serial message communica-
tion and radio configuration.
©2012 by Murata Electronics N.A., Inc.
DNT90M Integration Guide (2012/09/17)
Page 53 of 74
www.murata.com
