DS04-28824-1E

FUJITSU SEMICONDUCTOR

DATA SHEET

ASSP for Screen Display Control

CMOS

ON-Screen Display Controller (OSDC-360)

MB90092

DESCRIPTION

The MB90092 is the display controller for displaying text and graphics on the TV screen.
The MB90092 incorporates display memory (VRAM), a font memory interface, and a video signal generator,
allowing text and graphics to be displayed in conjunction with a small number of external components.
The MB90092 can provide two screens, called the main screen and the sub-screen, either independently or
overlayed one on top of the other.
The main screen consists of 24 characters by 12 lines and allows data to be set for each character. The
sub-screen consists of 24 characters by 12 lines or up to 32 characters by 16 lines. Data can be set either for
each line in the former configuration or collectively for the entire screen in the latter configuration.
The characters supported by the MB90092 are the normal characters made up of 24 by 32 dots and the 8

32-dot graphic characters that can be displayed in any of eight different colors in character units.
If filled with only graphic characters, the main screen is 192 (horizontal)

384 (vertical) dots. In the same case,

the sub-screen is 192 (horizontal)

384 (vertical) dots, or 256 (horizontal)

512 (vertical) dots. (The actual

display screen depends on the dot clock frequency in the horizontal direction and on the number of rasters of the
television system in the vertical direction.) The MB90092 uses RAM as font memory, enabling free graphics display.
The MB90092 can use up to 16384 types of characters including normal and graphic characters in total. It can
control up to 16M bits of external font memory.
For output of video signals, the MB90092 has the composite video signal, Y/C-separated video signal, and RGB
digital output pins. The MB90092 also has video signal input pins, allowing superimpose display over either
composite video signals and Y/C-separated video signals.

PACKAGE

80-pin Plastic QFP

(FPT-80P-M06)

MB90092

FEATURES

Main Screen Display

· Screen display capacity: 24 characters

12 lines (up to 288 characters)

· Character sizes:

Standard, double width, double height, double width

double height, quadruple

width

double height (Setting possible for each line)

· Display position control: Horizontal display start position: Set in 1/3-character units

Vertical display start position:

Set in raster units

Line spacing control:

Set in raster units (0 to 15 rasters)

· Display priority control:

Capable of controlling display priority over the sub-screen (for each line)

· Normal mode display

· Normal character exclusive display mode:

Screen capacity:

24 characters

12 lines (up to 288 characters)

Character types:

8192 different characters (8 M addresses)

· Character display:

Character dot configuration: 24

32 dots (per character)

Character color:

8 colors (for each character)

4 phases (for each line)

Character background color: 8 colors (for each character)
Display mode:

Selectable from among the pattern background/
solid-fill backgroundor/no background modes

· Extended graphics mode display

· Mode for displaying individually selected, normal and graphic characters mixed:

Screen capacity:

24 characters

12 lines (up to 288 characters)

192 horizontal dots

384 vertical dots (entire screen)

Character types:

16384 different characters (16 M addresses)

· Normal character display: Character dot configuration: 24 horizontal dots

32 vertical dots

Character color:

8 colors (for each character)

4 phases (for each line)

Line background color:

8 colors (for each line)

Display mode:

Selectable from among the pattern background/
solid-fill background/no background modes
Shaded background display available (set for each
character)

· Graphic character display:Character dot configuration: 8 horizontal dots

32 vertical dots

Character color:

8 colors (for each dot)

4 phases (for each character)

Sub-Screen Display

Screen display position: Settable horizontally and vertically in 2-dot units

· Normal screen mode

Screen capacity:

32 characters

12 lines (up to 384 characters)

256 horizontal dots

384 vertical dots (graphics

characters only) (The actual display screen depends
on the television system and dot clock frequency.
Normal character/graphic character display
selectable for each line (Header display character
code is specified for each line.)

Character string length:

Selectable from among 1, 2, 4, 8, 16, 24, and 32 digits

· Normal character display: Character dot configuration: 24 horizontal dots

32 vertical dots

Character color:

8 colors (for each line)

Pattern background color:

8 colors (entire screen)

· Graphic character display:Character dot configuration: 8 horizontal dots

32 vertical dots

Character color:

8 colors (for each dot)

4 phases (for each line)

MB90092

· Full-screen mode

Screen capacity:

32 characters

16 lines (up to 512 characters)

256 horizontal dots

512 vertical dots

(The actual display screen depends on the television
system and dot clock frequency.)

Virtual screen capacity:

Mode A: 32 characters

16 lines (

32 screens)

256 horizontal dots

512 vertical dots

Mode B: 512 characters

32 lines

4096 horizontal dots

1024 vertical dots

· Normal character display: Character dot configuration: 24 horizontal dots

32 vertical dots

Character color:

8 colors (set for the entire screen)

Pattern background color:

8 colors (set for the entire screen)

· Graphic character display:Character dot configuration: 8 horizontal dots

32 vertical dots

Character color:

8 colors (for each dot)

4 phases (set for the entire

screen)

Screen Background Display

Screen background color: 8 colors (set for the entire screen)

Analog Inputs

· Composite video signal input
· Y/C-separated inputs

Analog Outputs

· Composite video signal output
· Y/C-separated outputs

Digital Outputs

· G (Green), R (Red), and B (Blue) output
· VOC (character) output, VOB (character + background) output
· Characters, character background, line background, and screen background each capable of being displayed

in eight colors

Internal Synchronization Control (Video Signal Generator)

· Internal video signal generator supporting the NTSC and PAL systems
· Interlaced/noninterlaced display selectable

External Synchronization Control

· Separated sync signal input/composite sync signal input selectable

External Interface

· 8-bit serial inputs (3 signal input pins)

Chip select: CS
Serial clock: SCLK
Serial data: SIN

Package

· QFP-80

Miscellaneous

· Internal power-on reset circuit

MB90092

PIN ASSIGNMENT

Figure 1 shows the pin assignment of the MB90092.

VBLNK

VSYNC

HSYNC

ADR10

VOC

ADR9

VOB

ADR8

ADR7

ADR6

ADR5

ADR4

SCLK

ADR3

SIN

ADR2

ADR1

EXHSYN

ADR0

EXVSYN

DA7

DA6

DA5

EXS

DA4

DA3

[NC]

FSCO

CBCK

PDS

DA2

DA1

DA0

READ

MB90092

[NC]

YOUT

YIN

COUT

CIN

VOUT

VKIN

VKOUT

VIN

EXD

TEST

TSC

ADR20

ADR19

ADR18

ADR1

ADR16

ADR15

ADR1

ADR12

ADR11

Figure 1 MB90092 Pin Assignment

MB90092

PIN DESCRIPTIONS

(Continued)

Pin name

Pin no.

I/O

Function

Internal color generation mode setting pin
This pin outputs the internally generated color burst signal to the video
signal output in response to Low-level input during external
synchronization control operation.
The pin can also be used as a reset signal input pin by Low-level input to
the TEST pin. In this case, Low-level input to this pin resets the
MB90092.
The pin is a hysteresis input with an internal pull-up resistor.

VOC

Character interval signal output pin
The output signal represents the character dot output interval.

VOB

Character/background internal signal output pin
During internal synchronization control operation, the output signal
represents the character, character background, line background, or
screen background output interval.

B
R
G

5
6
7

O
O
O

Color signal output pins
These pins output the character, character background, line
background, and screen background color signals.

Chip select pin
For serial transfer, set this pin to the Low level.
This pin is also used to release a power-on reset.
The pin is a hysteresis input with an internal pull-up resistor.

SCLK

Shift clock input pin for serial transfer
This pin is a hysteresis input with an internal pull-up resistor.

SIN

Serial data input pin
The pin is a hysteresis input with an internal pull-up resistor.

EXHSYN

External horizontal sync signal input pin
This pin can also serve as a composite sync signal input pin depending
on the internal register setting.
The pin is a hysteresis input with an internal pull-up resistor.

EXVSYN

External vertical sync signal input pin
Input to this pin is disabled when composite sync signal input has been
selected by setting the internal register.

HSYNC

Horizontal sync signal output pin
This pin can also output composite sync signals depending on the
internal register setting.
The pin outputs the signal (FSC) resulting from dividing the 4FSC clock
frequency by setting the TEST pin to the Low level.

VSYNC

Vertical sync signal output pin
This pin is fixed at the High level when composite sync signal output has
been selected by setting the internal register.
The pin outputs the dot clock oscillator signal when the TEST pin goes
Low.

Part Number MB90092

Document Outline