1

PRELIMINARY

Z89331

CP95TEL1400

CP95TEL1400 11/95

FEATURES

n

Part

ROM

RAM*

Speed

Number

(KB)

(Bytes)

(MHz)

Z89331

2 4

640

1 2

*General-Purpose

n

42-Pin SDIP Package

n

4.75- to 5.25-Volt Operating Range

n

0

°C to +70°C Temperature Range

n

One-Time Programmable

Z89331

OTPDIGITAL

TELEVISIONCONTROLLER

n

n

Fully Customized Character Set

n

Character-Control and Closed-Caption Modes

n

Keypad User Control

n

TV Tuner Serial Interface

n

Direct Video Signals

n

Low-EMI Option

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 customized 512 character set, formatted in two

256 character banks, can be displayed with a host of

display attributes that include underlining, italics, blinking,

eight foreground/background colors, character position

offset delay, and background transparency.

Serial interfacing with the television tuner is provided

through the tuner serial port. Other serial devices, such as

digital channel tunning adjustments, may be accessed

User control can be monitored through the keypad scanning

port, or the 16-bit remote control capture register. Receiver

functions such as color and volume can be directly

controlled by eight 8-bit pulse width modulated ports.

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

CC

V

DD

Ground

GND

V

SS