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SOFTWARE UPDATES
The USB-to-I2C software has a built-in update feature which allows you to check for
updates whenever your PC has an internet connection. This feature can be found under the
Options menu. USB-to-I2C updates can also be downloaded manually from the following
website:
https://www.i2ctools.com/manuals-and-downloads/
Check our website periodically for update announcements and information.
TECHNICAL SUPPORT
Technical support for USB-to-I2C is available via an email to
.
TROUBLESHOOTING
If you have problems with the software installation, ensure that you have Admin
Privileges.
The Adapter has 3.3 kOhm pull-up resistors connected to the I
2
C bus lines. Ensure
that additional pull-up resistors in the connected target system do not bring the pull-
up resistance below 1.6 kOhm for 5V systems or 1.1 kOhm for 3.3V systems. The on-
board pull-up resistors can be removed from the system by removing the pull-up
resistor jumpers RPU (see Hardware Description above).
USB-to-I2C monitors the communications on the I
2
C bus for proper operation of
connected peripherals; any errors on the bus are detected and reported by the
software. Bus communication is stopped if errors are detected and can be resumed
when the (hardware) problem is corrected and the transmission retried.
Keep the original USB-to-I2C installation CD-ROM or downloaded file in the event the
software needs to be re-installed. Future USB-to-I2C updates from our website may
require a previous installation from the original media.
If you get a Timeout message when using the software, make sure that there is a pull-
up connected to the SDA and SCL pins. The Timeout occurs when either, or both, of
the I2C pins are held low for more than 0.5 seconds. If pull-ups are connected,
remove the connection to the target system. Reset the hardware by removing the USB
cable and reinserting it. Make sure that all three jumpers are connected then try
sending an I2C message. If you still get a Timeout, then microcontroller has probably
been damaged. The unit will need to be returned for repair.
If all else fails, email a description of the problem you are having to us at
.
Note that all technical support requests must begin with an email to this address.
