User guide

ZIC2410 Getting Started Guide
Rev E Document No. 0005-05-08-11-001 Page 19 of 22
A DEALING WITH COM PORT CONFLICTS
i. Changing the Device ID Number
The ZIC2410 components which connect to a PC through a USB cable (i.e. evaluation boards) contain
a Cygnal CP2101 Single Chip USB to UART Interface Bridge. All of the Cygnal devices are
manufactured with the same serial number (0001). If you have purchased an evaluation kit, all
components contained in the kit should have had their serial numbers changed to a unique value. In
general, the evaluation boards in the kit have serial numbers of 0001, 0002, 0003, etc., and the
ZIC2410USB-WNA will have a serial number of 0010.
If the user is running multiple WNA’s from a single PC, or combining boards from multiple kits and
connecting several of them through USB cables simultaneously to the same PC, one or more of the
connected devices may have the same serial number. This may cause communication problems, if
the PC is unable to distinguish them apart. To resolve any conflict, run the following procedure to
discover and/or change the serial number of any of the
ZIC2410 components.
Figure 14 – Screen, Windows Explorer (Running CP210xSetIDs Program)
1) To change the serial number, connect only the device which is to be changed (e.g. an
evaluation board) to the PC and double click
CP210xSetIDs on the CP210xSetIDs executable
in the directory \ZIC2410\Tools\Others\CP210X_USB_ID_SET\ found on the supplied CD.
The window in Figure 14 will appear.
2) The serial number box at the top of the screen will have the complete Device ID number, in this
example it is the
‘0001’ part of ‘00# 0001 _00#’ as shown in Figure 15.
Figure 15 – Screen, CP210x Set IDs (Changing Device ID #’s)