GENERAL DESCRIPTION

The PCA8516 is a member of the PCA85XX CMOS family and is an on-screen character display generator controlled by a microcontroller via the on-chip fast I2C-bus interface or the on-chip High-speed 3-wire serial interface. It is suitable for use in high-end TV or camrecorder applications and has also been designed for use in conventional mid-end TV with advanced graphic features.

FEATURES

• Display RAM: 256 × 13 bits

• Display character fonts: 253 (fixed in ROM, mask programmable)

• Starting position of the first character displayed: 64 vertical and 64 horizontal starting positions can be selected by software

• Character size: 4 different character sizes on a line-by-line basis (1 dot = 1H/1V; 2H/2V; 3H/3V and 4H/4V)

• Character matrix: 12 × 18 with no spacing between characters and no rounding function

• Foreground colours: 16 combinations of Red, Green, Blue and Intensity on character-by-character basis

• Background/shadowing modes: 4 modes available, No background, Box shadowing, North-West shadowing and Frame shadowing (raster blanking) on frame basis

• Background colours: 16 combinations of Red, Green, Blue and Intensity on word-by-word basis. Available when background mode is in either the Box shadowing, North-West shadowing or Frame shadowing mode

• OSD oscillator: on-chip Phase-Locked Loop (PLL)

• Character blinking ratio: 1 : 1, 1 : 3 and 3 : 1 (programmable frequency of 1⁄16, 1⁄32, 1⁄64 or 1⁄128 of fVSYNC) on character basis

• Display format: flexible display format by using the Carriage Return Code, maximum number of characters per line is also flexible and depends upon the OSD clock frequency

• Spacing between lines: 4 choices comprising 0, 4, 8 and 12 horizontal scan lines

• Display character RAM address auto-post-increment when writing data

• Fast I2C-bus serial interface (400 kbaud) or High-speed 3-wire serial interface (1 Mbaud) for data/command transfer

• ACM (Active Character Monitor) specifically for use in camcorder applications on word basis; can also be used as a 5th colour control with R, G, B and I signals

• Programmable active input polarity of HSYNC and VSYNC

• Programmable output polarity of R, G, B, I and FB

• Supply voltage: 5 V ±10

• Operating temperature: −20 to +70 °C

• Package: SDIP24 or SO24