DESCRIPTION
The ScreenCoderTM SPI/Serial is a touch screen controller and integrated digitizer IC designed specifically for RISC-based systems, such as wireless Internet appliances. The small, single footprint IC interfaces the system via either the Serial Peripheral Interface (SPI) or Asynchronous Serial Interface.

FEATURES
• Touch screen controller / digitizer in a single, small footprint IC
• Interfaces the system via either Serial Peripheral Interface (SPI) and Asynchronous Serial Interface
• Works with any 4- or 8-wire resistive touch screen, regardless of size, material or vendor
• Provides high resolution of 1000 points per axis and a sampling rate of 200Hz
• Accurate, quick touch response due to advanced sampling technology and patented algorithms
• Zero-PowerTMoperation — IC typically consumes less than 1µA
• Highly resistant to RF and other noise sources
• Uses sophisticated power management for maximum power savings
• Offers external PS/2 port for the hot-plug connection of an external PS/2 pointing device
• Capable of providing other features, such as battery monitoring and GPIO
• PS/2 and USB interfaces available
• Available in small 7mm X 7mm 32-pin LQFP package

APPLICATIONS
• Wireless Internet Appliances
• Handheld PCs (H/PCs)
• Web Phones
• Portable Systems