Z89331

P R E L I M I N A R Y Z89331 CP95TEL1400 PRELIMINARY CUSTOMERPROCUREMENTSPECIFICATION Z89331 OTPDIGITAL TELEVISIONCONTROLLER FEATURES n Part Number Z89331 *General-Purpose ROM (KB) 24 RAM* (Bytes) 640 Speed (MHz) 12 n n n Serial Interfacing I2C Port Fully Customized Character Set Character-Control and Closed-Caption Modes Keypad User Control TV Tuner Serial Interface Direct Video Signals Low-EMI Option n n n n 42-Pin SDIP Package n 4.75- to 5.25-Volt Operating Range 0 °C to +70° C Temperature Range One-Time Programmable n n n GENERAL DESCRIPTION The Z89331 One-Time Programmable (OTP) Digital Television Controller is designed to provide complete audio and video control of television receivers, video recorders, and advanced on-screen display facilities. The Z89331 features a Z89C00 RISC processor core that controls on-board peripheral functions and registers using the standard processor instruction set. Character attributes can be controlled through two modes: the on-screen display Character-Control Mode and the Closed-Caption Mode. The Character-Control Mode provides access to the full set of attribute controls, allowing the modification of attributes on a character-by-character basis. The insertion of control characters permits direction of other character attributes. Closed-caption text can be decoded directly from the composite video signal and displayed on-screen with the assistance of the processor's digital signal processing (DSP) capabilities. The fully custo...