Z89307

P R E L I M I N A R Y Z89303/05/07 CPS DC-4222-03 PRELIMINARY CUSTOMERPROCUREMENTSPECIFICATION Z89303/05/07 DIGITALTELEVISIONCONTROLLER GENERAL DESCRIPTION The Z89303/05/07 Digital Television Controllers are application-specific controllers designed to provide complete audio and video control of television receivers, video recorders, with advanced on-screen display facilities. The Z89303/05/07 are 24K, 16K and 12K ROM versions in 52-pin SDIP packages. The powerful 12 MHz Z89C00 RISC processor core allows the user to control the onboard peripheral functions and registers using the standard processor instruction set. The extensive character attributes can be controlled in two modes: by the on-screen display controller character control mode for maximum display control flexibility, and closed caption mode for optimum display of closed caption text. Closed caption text can be decoded directly from the composite video signal with the assistance of the processor's digital signal processing capabilities and displayed on the screen. The character representation in this mode allows for a simple attribute control through the insertion of control characters, and each word of RAM specifies two displayed characters. The character control mode provides access to the full set of attribute controls. Each word of RAM specifies a single displayed character and basic character attributes, allowing the modification of attributes on a character-by-character basis. The insertion of control char...