STV9420 Datasheet, PDF (1/16 Pages) STMicroelectronics – MULTISYNC ON-SCREEN DISPLAY FOR MONITOR

STV9420
STV9421
MULTISYNC ON-SCREEN DISPLAY FOR MONITOR
.. 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 (I²C PROTOCOL)
. 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 I²C bus. It includes a
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.
I²C interface allows MCU to make transparent in-
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.
DIP20
(Plastic Package)
ORDER CODE : STV9421
October 1995
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