Priority control device

Abstract

The invention provides a priority control device which comprises a time pulse generator used for generating a time pulse signal, and a time difference generation unit provided with a plurality of signal paths; the signal paths are respectively provided with different signal transiting time; the time difference generation unit controls the time in receiving the input signals according to the time pulse signal; the priority control device also comprises a logical control unit coupled with the output ends of the signal paths and used for receiving the output signals of the signal paths to generate a plurality of control signals.

Description

technical field [0001] The invention relates to a priority control device, which allows multiple read / write actions to generate time differences, so as to avoid conflicts caused by simultaneous read / write of a memory. Background technique [0002] At present, liquid crystal displays have been widely used in various electronic products, such as computer monitors, automotive LCD screens, LCD TVs, and portable information products, such as notebook computers, mobile phones, digital cameras, and personal digital assistants. Due to the advantages of thin and light and low power consumption of liquid crystal display, the application of the product has grown significantly in just a few years. When applied to different products, there are different considerations in the design of the LCD drive circuit. For example, in portable products, in order to make the display last longer, the drive circuit must have low power consumption characteristics. If it is applied in a large area On a ...

AI Technical Summary

Problems solved by technology

[0004] In the application of LCD driver IC, SRAM must output the display data for a period of time to maintain the display speed of the display, for example, 60 frames per second. While the SRAM outputs the display data, the external circuit of the driver IC may also need to read / When writing the SRAM, because the read / write action of the SRAM outside the driver IC is not controlled by the driver IC itself, it may happen that the internal and external circuits of the driver IC want to read / write the SRAM at the same time. However, 1 -port 6-T SRAM has only one read / write port, and it is impossible to perform two read / write operations at the same time. When two read / write operations need to read / write 1-port 6-T SRAM at the same time, conflicts will occur, so the present invention proposes A priority control device to solve these problems

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