ADV7152 Datasheet | Analog Devices

DESCRIPTION FEATURES 220 MHz, 24-Bit (30-Bit Gamma Corrected) True Color Triple 10-Bit “Gamma Correcting” D/A Converters Triple 256 ؋ 10 (256 ؋ 30) Color Palette RAM On-Chip Clock Control Circuit Palette Priority Select Registers RS-343A/RS-170 patible Analog Outputs TTL patible Digital Inputs Standard MPU l/O Interface 10-Bit Parallel Structure 8+2 Byte Structure Programmable Pixel Port: 24-Bit and 8-Bit (Pseudo) Pixel Data Serializer Multiplexed Pixel Input Ports; 1:1, 2:1 +5 V CMOS Monolithic Construction 100-Lead Plastic Quad Flatpack (QFP) Thermally Enhanced to Achieve ␪JC < 1.0؇ C/W The ADV7152 (ADV®) is a plete analog output, Video RAM-DAC on a single CMOS monolithic chip. The part is specifically designed for use in high performance, color graphics workstations. The ADV7152 integrates a number of graphic functions onto one device allowing 24-bit direct True-Color operation at the maximum screen update rate of 220 MHz. The ADV7152 implements 30-bit True Color in 24-bit frame buffer designs. The part also supports other modes, including 15-bit True Color and 8-bit Pseudo or Indexed Color. Either the Red, Green or Blue input pixel ports can be used for Pseudo Color. The device consists of three, high speed, 10-bit, video D/A converters (RGB), three 256 ϫ 10 (one 256 ϫ 30) color look-up tables, palette priority selects, a pixel input data multiplexer/ serializer and a clock generator/divider circuit. The ADV7152 implements 1:1 and 2:1 pixel data multiplexing. The onboard palette priority select inputs enable multiple palette devices to be connected together for use in multipalette and window (Continued on page 10) MODES OF OPERATION 24-Bit True Color (30-Bit Gamma Corrected) @ 220 MHz @ 170 MHz @ 135 MHz @ 110 MHz @ 85 MHz ADV is a registered trademark of Analog Devices, Inc. 8-Bit Pseudo Color 15-Bit True Color FUNCTIONAL BLOCK DIAGRAM VAA 256-COLOR/GAMMA PALETTE RAM RED 256 x 10 P I X E L P O R T 48 MUX 2:1 8 8 8 GREEN 256 x 10 BLUE 256 x 10 4 2 10 10-BIT...