NXP Semiconductors
UM10789
USB-I²C-bus dongle OM13518 with a GUI
UM10789
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2014. All rights reserved.
User manual
Rev. 1 — 19 May 2014
3 of 19
1. Introduction
The OM13518 dongle is an easy to use interface handler between the USB of a PC and
the I
2
C-bus. The software control via a Graphical User Interface (GUI) allows a fast start
to communicate with different circuits.
•
USB-2 is used for data and the 5 V power supply.
•
Three I
2
C-bus ports are wired in parallel.
•
Cables to connect up the I
2
C-bus are enclosed.
2. Key features
2.1 USB-I
2
C interface module
The OM13518 dongle is a ready to run module. It creates a virtual COM-port via an USB
connection. It provides three I
2
C-bus connections with 5 V option to power the application
(max 450 mA).
Power consumption:
module/total: <50 mA/max 500 mA
I
2
C-bus clock frequency:
245 Hz – 400 kHz
USB driver for Windows:
Windows XP, Windows 7, Windows 8
Size:
50 mm
×
40 mm
×
15 mm
2.2 Software
The software control via a GUI allows a fast start to communicate to the different circuits.
Aside from the detailed GUI pages for the Real-Time Clocks, a UNIVERSAL
INTERFACE allows to communicate with any I
2
C-bus device by entering directly the hex
codes. Example:
s A2 28 p
Where s stands for the I
2
C START and p for the I
2
C STOP condition.
