DESCRIPTION

Connected to a host MCU via its serial I2C Bus, the STV9432TAP is a multifunction slave peripheral device integrating the following blocks:

  - On-screen Display. It includes a MASK PROGRAMMABLE ROM that holds the CUSTOM CHARACTER FONT, a 1Kbytes RAM that stores the code strings of the different lines of text to be displayed, and a set of registers to program character sizes and colors. A built-in digital PLL, operating at very high frequency, gives an accurrate display without visible jitter for a wide line frequency range from 15 to 140 kHz.

   - Cut-off Monitoring Circuitry includes: 5 x 8 bits PWM DACs, 3 x 8 bits ADCs and a programmable ADC sampling trigger. It gives the possibility to measure the three beam currents, during the horizontal flyback, at a given line in the frame, provided that the three ADC inputs are connected to a beam current sensing circuitry. The values are stored in three BEAM CURRENT REGISTERS, and available for MCU read.

   - Video Timing Analyzer. Using the Horizontal Sync,Vertical Sync, Horizontal Flyback, and ”Video Active” inputs, a set of counters give the different timing measurements necessary to analyze the current Video timing characteristics in order to make the automatic set-up of screen size and centering. The measurements are initialized on the same programmable trigger line than in the above cut-off monitoring circuitry.

■ MULTIFUNCTION OSD FOR MONITOR

■ INCLUDES FACILITIES FOR CUT-OFF VOLTAGE MONITORING:

- THREE 8 BITS ADC INPUTS

- ADC TRIGGER DURING RETRACE TIME OF A PROGRAMMED LINE

■ INCLUDES FACILITIES FOR SCREEN SIZE & CENTERING AUTO SETUP

- HS, VS, VIDEO TIMING MEASUREMENTS

■ 100MHz MAX. PIXEL CLOCK, AVAILABLE FOR ANY LINE FREQUENCY BETWEEN 15 AND 140 kHz

■ 12 x 18 CHARACTER ROM FONT INCLUDES:

- 240 MONOCOLOR CHARACTERS

- 16 MULTICOLOR CHARACTERS

■ CHARACTER FLASHING

■ UP TO 1K CHARACTERS TEXT DISPLAY

■ ULTRA HIGH FREQUENCY PLL FOR

■ JITTER-FREE DISPLAY

■ FLEXIBLE DISPLAY:

- ANY CHARACTER WIDTH AND HEIGHT

- ANYWHERE IN THE SCREEN

■ SINGLE BYTE CHARACTER CODES AND COLOR LOOK-UP TABLE FOR EASY PRO GRAMMING AND FAST ACCESS

■ CHARACTER FLIP OPERATIONS

■ WIDE DISPLAY WINDOW ALLOWS PATTERN GENERATION FOR FACTORY ADJUSTMENTS

■ I2C BUS MCU INTERFACE

■ FIVE 8 BITS PWM DAC OUTPUTS