Z86251

Z86251 CP96TEL1900 CUSTOMERPROCUREMENTSPECIFICATION Z86251 STARSIGHTDATABASEENGINE FEATURES s Part Z86251 Package 68-Pin PLCC Speed (MHz) 24 s s Power-Down DRAM Data Retention Infrared Transmitter Circuits for TV and VCR Control CRC-32 Encoding and Decoding Logic Watch-Dog Timer (WDT) for Error Recovery I2C Compatible Bus for External Communication Test Multiplexer for Chip Debug On-Chip Crystal Oscillator s s s s s 4.5- to 5.5-Volt Operating Range s 0 °C to +70° C Temperature Range Low-Power Consumption s Segmented Base Registers s DRAM Memory Control and Refresh Logic s s GENERAL DESCRIPTION Zilog's Z86251 StarSight Data Base Engine (DBE) is designed to process extracted data for the StarSight on-screen programming guide. The Z86251 provides a number of important peripheral functions, such as the IR Blaster to send command signals to the VCR, and low-power management to avoid loss of data. For fast memory data manipulation, the Z86251 offers segmented base registers. The device also features DRAM memory control and refresh logic. The DBE is optimized to work with Zilog's Z89300 series of TV controller devices to provide a cost-effective solution for StarSight programming-guide data extraction and display. Notes: All Signals with a preceding front slash, "/", are active Low, e.g.: B//W (WORD is active Low); /B/W (BYTE is active Low, only). Power connections follow conventional descriptions below: Connection Power Ground Circuit VCC GND Device VDD VSS CP96TEL1900 (8...