System for efficiently interfacing with display data intersystem
The system efficiently interfaces with display data using a single-chip module consisting of a Micro-Processor Unit (MPU) and a video CODEC. GUI data and video data are effectively displayed through LCD interfaces, respectively equipped in both of MPU and video CODEC, when two individual chips of MPU and video CODEC are incorporated into a single-chip module. The MPU and video CODEC may each be equipped with their own LCD interfaces. Thereby, GUI data of MPU and decoding video data of video CODEC are transmitted out to an external LCD driver for performing a display. The system for interfacing with display data is available for various multimedia applications, since a display of video CODEC and MPU can be more efficiently and freely performed through the method of data transmission using a LCD interface commonly supported by a MPU.
1. A display process, comprising:
generating GUI data in a Micro-Processor Unit (MPU);
employing the MPU to predict first and second display coordinates of decoding data generated in a video CODEC in advance of transfer of GUI data from the MPU to the video CODEC;
employing the MPU to save the predicted display coordinates at a prescribed register inside the video CODEC;
employing the first and second predicted display coordinates as criteria to choose between GUI data of the MPU and display data inside the video CODEC by:
(a) operating a multiplexer inside the video CODEC to selectively activate, according to the predicted display coordinates, a data bus operatively connected to transfer the GUI data from the MPU to the video CODEC through an LCD controller inside the MPU for performing a display; and
(c) operating the multiplexer to selectively activate, according to the predicted display coordinates, another data bus operatively connected to transfer the display data inside the video CODEC through an LCD controller inside the video CODEC for performing the display.