Pure Photonics
Confidential
PPEB700 ITLA and micro-ITLA eval board
Page
7
of
11
5. Communications interface
The communication with the module goes either through an RS-232 interface or a micro-
USB interface. The interface used is selected with a switch. The RS-232 interface typically
is connected through a hardware interface on a PC. The micro-USB interface installed
through a USB port. Sometimes an RS-232 to USB dongle can be used to connect an
RS-232 interface to a USB port.
In any case where a USB port is being used, it is recommended to set the interface
parameters to be suitable for serial communications. The latency time should be set to
1ms and packet size needs to be reduced to 64 (both inbound and outbound). This setting
can be accessed through the device manager, properties, advance properties.
The USB interface installs as a serial port. Typically, this happens automatically. In case
the correct driver is missing:
http://www.ftdichip.com/Drivers/CDM/CDM21224_Setup.zip
at
http://www.ftdichip.com/Drivers/VCP.htm
.
