ZILOG Z90365 Datasheet

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P

RELIMINARY

FEATURES

ROM

Device

Z90365 32 640 8 4.5 to 5.5V

Note: *General-Purpose

■

42-Pin SDIP

■

C to +70 ° C Temperature Range

■

Fully Customized Character Set

(KW)

RAM*

(Words)

PWM

(8-Bit)

Voltage

Range

C

USTOMER

P

ROCUREMENT

Z90365

D

IGITAL

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■

■

■

■

■

T

ELEVISION

Character-Control and Closed-Caption Modes
Keypad User Control
TV Tuner Serial Interface
Direct Video Signals
Supports Violence Blocking
Speed: 12 MHz

C

ONTROLLER

S

PECIFICATION

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GENERAL DESCRIPTION

The Z90365 Digital Television Controller is designed to
provide complete audio and video control of television re­ceivers, video recorders, and advanced on-screen display
facilities. The television controller features a Z89C00 RISC
processor core that controls the 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 tuning adjustments, may be accessed
through the industry-standard I

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. For example, 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

2

C port.

V

DD
SS

CP97TEL2800

P R E L I M I N A R Y

1

2

Z90365
Digital Television Controller Zilog

GENERAL DESCRIPTION (Continued)

Port 17
Port 00

Capture
IRIN

ADC

ADC0
ADC1

ADC2
ADC3

ADC4

Port 0

Port 00
Port 01

Port 02
Port 03

Port 04
Port 05

Port 06
Port 07
Port 08

Port 09
Port 0F

PWM

PWM1
PWM2
PWM3

PWM4
PWM5
PWM9
PWM10

Port1

Port 10
Port 11

Port 12
Port 13

Port 14
Port 15

Port 16
Port 17

Port 18

RAM

640 x 16

Address

Data

Control
XTAL1

XTAL2
LPF

HSYNC
VSYNC

/Reset

CPU

Register Addr/Data

HALFBLNK

ROM Addr

ROM Data

Figure 1. Functional Block Diagram

OSD

V1
V2

V3

VBLANK

Port0F

ROM

32K x 16

P R E L I M I N A R Y

CP97TEL2800

1

Z90365

Zilog Digital Television Controller

PIN DESCRIPTION

PWM10

PWM9
PWM5
PWM4

PWM3

PWM2

PWM1

Port03

Port04/ADC4
Port05/ADC3
Port00/ADC2

Port17/ADC1

GND

Port10/R<0>

Port06/Counter

Port18/G<0>
Port13/G<1> HSync

1
2
3
4
5

6
7

8
9
10
11

12
13

15
16
17

Z90365

Shrink

DIP

42
41

40
39

38
37
36
35

34
33

32
31

30
2914

28
27
26

Port12/I2MSD
P11/I2MSC

Port02/I2SSD
Port01/I2SSC

Port09

Port08/R<1>

IRIN
Port07/CSync

Vcc

/Reset
XTAL2

XTAL1
ANGND

LPF
CVI/ADC0

VSync

Port14/B<0>
Port15/B<1>

Port16/SCLK

18
19
20
21Port0F/Half Blank

25
24

23
22

Figure 2. 42-Pin Shrink DIP

VBlank
V1

V2
V3

CP97TEL2800

P R E L I M I N A R Y

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