STV9420

STV9421

MULTISYNC ON-SCREEN DISPLAY FOR MONITOR

October 1995

DIP20

(Plastic Package)

ORDER CODE : STV9421

.

CMOS SINGLE CHIP OSD FOR MONITOR

.

BUILT IN 1 KBYTE RAM HOLDING :

- PAGES’ DESCRIPTORS

- CHARACTER CODES

- USER DEFINABLE CHARACTERS

.

128 ALPHANUMERIC CHARACTERS OR

GRAPHIC SYMBOLS IN INTERNAL ROM

(12 x 18 DOT MATRIX)

.

UP TO 26 USER DEFINABLE CHARACTERS

.

INTERNAL HORIZONTAL PLL (15 TO 120kHz)

.

PROGRAMMABLE VERTICAL HEIGHT OF

CHARACTER WITH A SLICE INTERPOLATOR

TO MEET MULTI-SYNCH REQUIREMENTS

.

PROGRAMMABLE VERTICAL AND HORI-

ZONTAL POSITIONING

.

FLEXIBLE SCREEN DESCRIPTION

.

CHARACTER BY CHARACTER COLOR SE-

LECTION (UP TO 8 DIFFERENT COLORS)

.

PROGRAMMABLE BACKGROUND (COLOR,

TRANSPARENT OR WITH SHADOWING)

.

CHARACTER BLINKING

.

2-WIRES ASYNCHRONOUS SERIAL MCU

INTERFACE (I

.

4 x 8 BITS PWM DAC OUTPUTS ON THE

STV9421

.

SINGLE POSITIVE 5V SUPPLY

DIP16

(Plastic Package)

ORDER CODE : STV9420

DESCRIPTION

The STV9420/21 is an ON SCREEN DISPLAY for

monitor. It is built as a slave peripheral connected

to a host MCU via a serial I

display memory, controls all the display attributes

and generates pixels from the data read in its on

chip memory. The line PLL and a special slice

interpolator allow to have a display aspect which

does not depend on the line and frame frequencies.

I

ternal access to prepare the next pages during the

display of the current page. Toggle from one page

to another by programming only one register.

4 x 8 bits PWM DAC are available (STV9421) to

provide DC voltage control to other peripherals.

The STV9420/21 provides the user an easy to use

and cost effective solution to display alphanumeric

or graphic information on monitor screen.

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