I²C Interface for Touchscreens
October 9, 2014
Compared with RS232, the I²C-based touch systems work with a very high speed of 3.4 Mbit/s and are extremely energy efficient with a supply voltage starting at 1.2V. The power consumption is extremely low. Therefore power supplies, batteries in handheld devices and the corresponding peripheral circuits can be very compact. This saves space, weight and cost through reduced cooling effort and also increases the life time due to the lower heat load of all components within the system.
Another advantage of I²C is that there are no license fees required. This makes the I²C ICs significantly cheaper than USB or combined solutions. With the appropriate chip selection the costs can be reduced by another 30 percent without any sacrifice in functionality. On a project basis, other sizes currently up to a maximum of 24″ can be implemented. For shapes, colors and logos there are virtually no restrictions offering a complete bespoke touch screen solution. To enable a professional and fast design-in support for the I²C hardware, our engineers have already prepared several implementations for various Linux kernel versions and for Android. We can provide appropriate driver binaries, config files and sample scripts and adaptions to specific customer’s requirements are carried out quickly and efficiently.
We will present the high quality touch solutions with I²C interface at stand 210 in hall 8 at SPS/IPC/DRIVES from November 25 to 27,2014 in Nuremburg, Germany.
Please contact us in case of any questions.