1
Z86251
CP96TEL1900
CP96TEL1900 (8/96)
Z86251
STARSIGHT DATABASE ENGINE
FEATURES
s
Part
Package Speed (MHz)
Z86251
68-Pin PLCC
2 4
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
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
I
2
C Compatible Bus for External Communication
s
Test Multiplexer for Chip Debug
s
On-Chip Crystal Oscillator
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.
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
d a t a .
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
Circuit
Device
Power
V
CC
V
DD
Ground
GND
V
SS
GENERAL DESCRIPTION
C
USTOMER
P
ROCUREMENT
S
PECIFICATION
4
Z86251
CP96TEL1900
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Min
Max
Units
Conditions
V
DD
Power Supply Voltage
0.3
7
V
All pins with respect to GND
T
A
Operating Ambient Temp.
0
7 0
C
T
S
Storage Temperature
65
150
C
Stress greater than those listed under Absolute Maximum
Ratings may cause permanent damage to the device. This
is a stress rating only; operation of the device at any
condition above those indicated in the operational sec-
tions of these specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods
may affect device reliability.
8
Z86251
CP96TEL1900
Zilog's products are not authorized for use as critical compo-
nents in life support devices or systems unless a specific written
agreement pertaining to such intended use is executed between
the customer and Zilog prior to use. Life support devices or
systems are those which are intended for surgical implantation
into the body, or which sustains life whose failure to perform,
when properly used in accordance with instructions for use
provided in the labeling, can be reasonably expected to result in
significant injury to the user.
Zilog, Inc. 210 East Hacienda Ave.
Campbell, CA 95008-6600
Telephone (408) 370-8000
FAX 408 370-8056
Internet: http://www.zilog.com
1996 by Zilog, Inc. All rights reserved. No part of this document
may be copied or reproduced in any form or by any means
without the prior written consent of Zilog, Inc. The information in
this document is subject to change without notice. Devices sold
by Zilog, Inc. are covered by warranty and patent indemnification
provisions appearing in Zilog, Inc. Terms and Conditions of Sale
only. Zilog, Inc. makes no warranty, express, statutory, implied or
by description, regarding the information set forth herein or
regarding the freedom of the described devices from intellectual
property infringement. Zilog, Inc. makes no warranty of mer-
chantability or fitness for any purpose. Zilog, Inc. shall not be
responsible for any errors that may appear in this document.
Zilog, Inc. makes no commitment to update or keep current the
information contained in this document.
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