SUNNYVALE, Calif.--Mitsubishi Electric Corp.'s U.S. subsidiary here today claimed that the company has developed the first IC to integrate a color TV image signal processor and 8-bit microcontroller for North American television sets.
The 80-pin CMOS processor is the first in a new series of Dreama ICs. Its microcontroller handles a range of display functions--such as on-screen display and closed caption features--while four ASIC blocks perform video signal processing.
"Our new Dreama 1 chip offers customers a totally digital single-chip solution to analog video circuits, eliminating many of the problems associated with multi-chip mixed-signal printed circuit board design, not to mention saving development time and cost," said George Riehm, senior marketing manager for consumer products at Mitsubishi Electric & Electronics USA Inc.
By integrating more functions on a single CMOS device, the processor reduces system noise and electromagnetic interference (EMI) while helping TV manufacturers to reduce development time, cost, and time-to-market in NTSC-based television applications, said Mitsubishi.
The Dreama 1 chip incorporates Mitsubishi's M37272 microcontroller core into its architecture. It also includes 40 kilobytes of ROM; 1,152 bytes of RAM; and 64 bytes of ROM correction memory.
The MCU contains functions for on-screen display (OSD), closed caption data slicer, and a multi-master I2C bus interface. Mitsubishi said these functions make the Dreama device suitable as a channel selection system with a closed caption decoder for televisions. The OSD function can display 32 characters x 2 lines and 254 kinds of characters. It also has a half-tone function, said the company.
Four ASIC blocks are also included on the Dreama 1 chip. The analog front-end block is composed of two CVBS (composite video broadband signal) analog switch inputs, Y/C signal inputs, and two-channel 8-bit high-speed video analog-to-digital converters (ADCs) and automatic color control (ACC) amplifiers.
The video and chroma block contains a high-performance, two-line adaptive digital comb filter, with the video portion including sharpness, YNR, high-performance blackstretch circuits, chroma decoder, and RGB matrix as well as an OSD mixing circuit. The deflection block features high-performance sync separation via an analog and digital mixed-signal solution. The analog back-end block contains three-channel 10-bit high-speed video digital-to-analog (DAC) converters for "cutoff and drive" functions and a "mute" circuit.
The 80-pin M65580MAP digital video processor is priced at $8.65 each in sample quantities.