STV9420 Datasheet | STMicroelectronics

.. 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 120k Hz) PROGRAMMABLE VERTICAL HEIGHT OF CHARACTER WITH A SLICE INTERPOLATOR TO MEET MULTI-SYNCH REQUIREMENTS PROGRAMMABLE VERTICAL AND HORIZONTAL POSITIONING FLEXIBLE SCREEN DESCRIPTION CHARACTER BY CHARACTER COLOR SELECTION (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 internal 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. October 1995 DIP20 (Plastic Package) ORDER CODE : STV9421 1/16 - STV9421 .. PIN CONNECTIONS DIP16 FBLK H-SYNC V-SYNC VDD PXCK CKOUT XTALOUT XTALIN 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 TEST B G R GND RESET SDA SCL DIP20 PWM1 FBLK H-SYNC...