DESCRIPTION
The ScreenCoderTM PS2 is a high-performance IC that interfaces any 4 or 8-wire resistive touch screen to the standard PS/2 mouse port. Low-power and tiny, the single IC is ideal for portable systems, web phones and interactive kiosks. It offers an advanced algorithm for enhanced motion control as well as an extra port for hot-plug connection of an external PS/2 pointing device. Both the touch screen and the external device can be operated concurrently without any penalty.

FEATURES
• Embedded touch screen and external pointing device can operate concurrently with no performance penalty
• Supports both absolute and relative (mouse-like) modes of operation
• For relative mode, no special drivers are needed; highfunctionality driver available for absolute mode
• Supports all commands defined in the IBM PS/2 Mouse Communication Protocol, as well as Semtech’s extended PS/2 communication protocol with absolute positioning support
• Available in a low-profile 32-pin LQFP package
• Few external components required
• Controller & digitizer in a single IC; no need for external A/D
• Interfaces ANY 4- or 8-wire resistive touch screen to standard PS/2 mouse port; regardless of size, material or vendor
• High-performance IC offers accurate cursor control due to advanced algorithms
• Low-power consumption, due to sophisticated power management states, ideal for battery-operated systems
• Highly resistant to RF & other noise sources
• Enables hot-plug connection of an external pointing device
• Wheelmouse functionality is supported in the external pointing device
• Other interfaces available

APPLICATIONS
• Portable systems
• Notebooks and Laptops
• Interactive Kiosks
• Touch-enabled monitors