Page 1
FEATURES
C
USTOMER
P
ROCUREMENT SPECIFICATION
Z86251
STARSIGHT DATABASE ENGINE
Z86251
CP96TEL1900
■ Part Package Speed (MHz)
Z86251 68-Pin PLCC 24
■ 4.5- to 5.5-Volt Operating Range
■ 0°C to +70°C Temperature Range
■ Low-Power Consumption
■ Segmented Base Registers
■ DRAM Memory Control and Refresh Logic
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.
■ 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
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.
CP96TEL1900 (8/96)
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 Circuit Device
Power V
Ground GND V
CC
V
DD
SS
1
Page 2
PIN DESCRIPTION
Z86251
CP96TEL1900
P AD0
P AD1
P AD2
P AD3
P AD4
P AD5
P AD6
P AD7
GND2
VDD2
P XWR
P XRD
P ALE
P XPSEN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
PRDATA0
PRDATA1
PRDATA3
PRDATA2
789 6543216867666564636261
PXWE
PXRAS
PXCAS
GND1
VDD1
PED A9
PED A8
PED A6
PED A7
PED A5
PED A4
Z86251
68-Pin
PLCC
PED A2
PED A3
60
59
58
57
56
55
54
53
52
51
50
49
48
47
PED A1
PED A0
PLPOSC2
PLPOSC1
PIO7
PIO6
PIO4
VDD4
GND4
PIO3
PIO2
PIO1
PIO0
PISB DTA
POSC 2
P A15
P A14
24
25
26
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
P A9
P A13
P A12
P A1 1
P A10
P A8
PXISBINT
PBAND2 I
Z86251 68-Pin PLCC
Pin Assignments
VDD3
GND3
PUPRESET
P DRAM EN
PIO5
PXTAL1
P6805CLK
PXTAL2
PIR XCLK
46
45
44
PISB CLK
P XRESET
PXLPWARN
2
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PIN DESCRIPTION (Continued)
Z86251
CP96TEL1900
Z86251 Pinouts
3
Page 4
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Min Max Units Conditions
Z86251
CP96TEL1900
V
DD
T
A
T
S
Power Supply Voltage –0.3 7 V All pins with respect to GND
Operating Ambient Temp. 0 70 °C
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.
4
Page 5
CP96TEL1900
DC CHARACTERISTICS
TA = 0°C to + 70°C; VCC = 4.5 V to + 5.5 V
Symbol Parameter Min Max Typical Units Conditions Notes
Z86251
V
V
V
V
V
V
VX
VX
VX
VX
I
OL1
I
OL1
I
OL2
I
OL2
V
I
DD1
I
DD2
IL
IH
OL1
OH1
OL2
OH2
DD1
IL1
IH1
OL2
OH2
Input Voltage Low 0 0.2 V
Input Voltage High 0.5 V
DD
DD
V
DD
Output Voltage Low 0.16 0.4 V @ I
Output Voltage High V
–0.4 4.75 V
DD
Output Voltage Low 0.16 0.4 V @ I
Output Voltage High VDD –0.4 4.75 V
Input Voltage Low 0.2 V
Input Voltage High 0.7 V
DD
0.4 V (except XTAL1)
3.6 V (except XTAL1)
DD
DD
DD
V@ I
V@ I
V for XTAL1
OH1
OH1
OH2
OH2
V for XTAL1
Output Voltage Low 0.16 0.4 V for XTAL2 @ 4.5 mA
Output Voltage High VDD –0.4 4.75 V
DD
V for XTAL2 @ 3.7 mA
Output Current Low 2.5 mA
Output Current High 1.5 mA
Output Current Low 10 mA
Output Current High 6 mA
Operating Supply Voltage 4.3 5.0 5.5 V
Operating Supply Current 40 mA
Operating Supply Current 10 µA
AC CHARACTERISTICS
TA = 0°C to + 70°C; VDD = 4.5 V to + 5.5 V
Symbol Parameter Min Max Typical Units Conditions Notes
fosc Oscillator Frequency 24 MHz
V
IN
V
OUT
Absolute Min/Max
Input Voltage Range –0.3 V
Absolute Min/Max
Output Voltage Range –0.3 V
+ 0.3 V
DD
+ 0.3 V
DD
5
Page 6
I/O READ ADDRESS REGISTER SUMMARY
Z86251
CP96TEL1900
I/O Read Address Register Summary Table
6
Page 7
I/O WRITE ADDRESS REGISTER SUMMARY
Z86251
CP96TEL1900
I/O Write Address Register Summary Table
7
Page 8
Z86251
CP96TEL1900
© 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 merchantability 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.
8
Zilog’s products are not authorized for use as critical components 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
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