Z86251 Datasheet, PDF (1/8 Pages) Zilog, Inc. – STARSIGHT DATABASEENGINE

Z86251
CP96TEL1900
CUSTOMERPROCUREMENTSPECIFICATION
FEATURES
s Part
Z86251
Package
68-Pin PLCC
Speed (MHz)
24
s 4.5- to 5.5-Volt Operating Range
s 0°C to +70°C Temperature Range
s Low-Power Consumption
s Segmented Base Registers
s DRAM Memory Control and Refresh Logic
Z86251
STARSIGHT DATABASE ENGINE
s Power-Down DRAM Data Retention
s Infrared Transmitter Circuits for TV and VCR Control
s CRC-32 Encoding and Decoding Logic
s Watch-Dog Timer (WDT) for Error Recovery
s I²C Compatible Bus for External Communication
s Test Multiplexer for Chip Debug
s On-Chip Crystal Oscillator
GENERAL DESCRIPTION
Zilog's Z86251 StarSight Data Base Engine (DBE) is
designed to process extracted data for the StarSight
on-screen programming guide.
For fast memory data manipulation, the Z86251 offers
segmented base registers. The device also features
DRAM memory control and refresh logic.
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.
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 be-
low:
Connection
Power
Ground
Circuit
V_CC
GND
Device
V_DD
V_SS
CP96TEL[phone])
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