JP2002229516A - Arbitrator between micro-controller and screen display device, and operation method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such an EEPROM for a micro-controller and a screen display device that the micro-controller (μC) and the screen display device (OSD) can share the single EEPROM through an EEPROM type arbitrator, and to provide an operation method therefor. SOLUTION: The micro-controller (μC) 31, the screen display device (CD) 32, the arbitrator 5, and the common EEPROM 6 are arranged on the same integrated circuit chip.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an arbiter (arbitr) for a microcontroller (μC) and a screen display device (OSD).
ator) and its operation method, more specifically, a microcontroller (μC) and a screen display device (OSD)
The present invention relates to an arbitrator that allows two EEPROMs to be shared, and a method of operating the arbitrator.

[0002]

2. Description of the Related Art As shown in FIG. 4, there is shown a systematic block diagram showing a screen display control device according to the prior art. Personal computer (PC)
When one liquid crystal display panel is used to display images and graphics, a screen display control device 3 including a microcontroller (μC) and a screen display device (OSD) controls the liquid crystal display panel 4 Used. That is, after the analog image signal output from the personal computer (PC) 1 is converted into a digital image signal by the analog-to-digital converter (ADC) 2, the screen display control device 3 displays the image on the liquid crystal display panel 4. Is used to control the
This screen display control device 3 includes a microcontroller (μ
C) 31 and a screen display device (OSD) 32.
Microcontroller (μC) 31 and screen display (OSD)
32 are fabricated on the same IC chip and are connected to electrically erasable and rewritable EEPROMs 33 and 34, respectively. A detailed block diagram of the screen display control device shown in FIG. 4 is shown in FIG. A microcontroller (μC) 31 and an on-screen display (OSD) 32 must be connected to EEPROMs 33 and 34, respectively. Since the EEPROM 33 for 31 and the EEPROM 34 for the screen display device (OSD) 32 were not manufactured on the same chip of the screen display control device 3, it is impossible to reduce cost, power consumption and overall capacity. . Thus, to produce devices such as notebook and laptop computers that are very thin, very small in size, and have very low power consumption to match current fashion trends, the current technology requires: It will cause some design issues that cannot be solved. In order to significantly reduce the capacity, cost and power consumption, we have developed a device that can reduce the number of EEPROMs used in the screen display controller to a single EEPROM, and this single EEPROM and There is a practical need to fabricate screen display controllers on the same chip.

[0003]

SUMMARY OF THE INVENTION The prior art solves the problem that it is not possible to meet the requirements of designing a device that is very thin, very small in size and very low in power consumption. Therefore, one object of the present invention is to provide a microcontroller (μC) and a screen display device (OSC) so that a single EEPROM can be shared by an arbitrator. (OSD) and a method of operating the same, thereby providing a microcontroller (μC), a screen display device (OSD), an arbitrator and a common EE.
PROMs can be fabricated on the same integrated circuit (IC) chip. To achieve the above object of the present invention, an arbiter between a microcontroller (μC) and a screen display device (OSD) is provided by the present invention, wherein the microcontroller (μC) and the screen display device (OSD) are Included in the screen display control device to control and display images and graphics on the liquid crystal display device, and the arbitrator detects the display state of the liquid crystal display device, and controls the state according to time division A state detector for generating a signal; a clock generator for generating a clock from a state control signal of the state detector to control operation of the microcontroller (μC) and the screen display device (OSD); A Stealth ROM for storing a time-division programmable program for controlling the device and generating a state control signal according to the programmed time-division; Image signal and the screen display unit operation block screen display device (OSD) (OSD)
An electrical bridge from the microcontroller (μC) to the screen display (OSD) for transfer to the; the cycle time of the steel is programmable, thus the microcontroller (μC) and the screen display (OSD)
However, a single EEPROM can be shared through the arbiter.

According to the present invention, a microcontroller (μ)
C) and a method of operating an arbiter between a screen display device (OSD) and a microcontroller (μC) and a screen display device (OSD) are provided to control and display images and patterns on a liquid crystal display. Included in a display controller, and the arbitrator includes a status detector, a clock generator, a still ROM and an electrical bridge from a microcontroller (μC) to a screen display (OSD), and the method as described above comprises: Detects the display state of the liquid crystal display according to a time-division programmable program stored in a steel ROM; a microcontroller (μC) and a screen display device (O
A microcontroller (μC) so as to generate a state control signal for controlling a clock generator to generate an operating clock for controlling the SD); and to perform a display operation of an image and a pattern on a liquid crystal display. ) Transfers images and signals to an on-screen display (OSD); the steal is a programmable cycle time, whereby the microcontroller (μC) and the on-screen display (OSD) are united through an arbitrator. EEPROM can be shared.

[0005] The above and other objects, features and advantages of the present invention will become more apparent from the detailed description taken in conjunction with the accompanying drawings.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a block diagram showing a screen display control device according to the present invention is shown. The screen display control device 3 ′ includes a microcontroller (μC) 31, a screen display device (OSD) 32, an arbitrator 5,
The arbiter 5 can share a single EEPROM 6 with the microcontroller 31 and the screen display device 32, and the microcontroller (μC) 31, the screen display device (OSD) 32, Table 5 and EEPRO
M6 can be formed on the same IC chip. Its structure and operation method will be described later in detail.

FIG. 3 is a detailed diagram illustrating the arbitrator of the present invention. The arbitrator 5 has a state detector 7 for detecting a display state of the liquid crystal display device and generating a state control signal according to time division. In response to the state control signal, the clock generator 8 generates an operation clock for the programmable microcontroller (μC) 31 and the on-screen display device (OSD) 32 shown in FIG. The state detector 7 then generates a state control signal according to a time division programmable program stored in a Steal ROM 9. The operation signal is input to the microcontroller (μC) 31, and then the operation signal is transmitted to the screen display device (OSD) by the electric bridge from the microcontroller (μC) 31 to the screen display device (OSD) 10.
D) Enter 32. During operation of the microcontroller (μC) 31, the video signal is
Temporarily stored in the OSDRAM 11 and a screen display device (OSD) 32 through the arbitrator 5 to a single EEPROM 6
Can be shared. Therefore screen display device (OSD)
Capacity can be greatly reduced, and the effects of miniaturization and excellent low power consumption can be achieved, and miniaturization design as a condition can be facilitated.

[0008] A person skilled in the art can make various modifications and variations without limiting the present invention to the above description, and the spirit and scope of the present invention are defined by the claims. It will be understood that it is considered to be included within the scope.

[Brief description of the drawings]

FIG. 1 is a block diagram of a screen display control device of the present invention.

FIG. 2 is a timing chart showing operations of a microcontroller (μC) and a screen display device (OSD) included in the screen display control device of the present invention.

FIG. 3 is a detailed diagram illustrating the arbitrator of the present invention.

FIG. 4 is a systematic block diagram of a screen display control device according to the prior art.

5 is a detailed block diagram of the screen display control device shown in FIG.

[Explanation of symbols]

 2 Analog-to-Digital Converter (ADC) 4 Digital Panel 5 Arbitrator 6 EEPROM 7 Status Detector 8 Clock Generator 9 Steel ROM 10 Electric Bridge from μC to OSD 31 Microcontroller (μC) 32 Screen Display (OSD)

Claims (2)

[Claims] 1. A microcontroller (μC) in which a microcontroller (μC) and a screen display device (OSD) are included in a screen display control device for controlling and displaying images and graphics on a liquid crystal display device. And screen display (O
An arbitrator for detecting a display state of the liquid crystal display device and generating a state control signal according to time division; and a clock from the state control signal of the state detector. A clock generator for generating and controlling the operation of the microcontroller (μC) and the screen display device (OSD); and for controlling the state detector to generate a state control signal according to a programmed time division A Stealth ROM for storing a programmable program of division; a video signal and an operating clock of an OSD (Screen Display Device)
An electrical bridge from the microcontroller (μC) to the screen display (OSD) for transfer to the SD);
The cycle time of the steel is programmable, so the microcontroller (μC) and the screen display (O
SD) arbitrator between a microcontroller and a screen display device, wherein a single EEPROM can be shared through the arbitrator. 2. A microcontroller (μC) and a screen display device (OSD) are included in the screen display control device for controlling images and graphics to be displayed on a liquid crystal display device, and an arbitrator is provided. Arbitrator, including state detector, clock generator, steel ROM, and electrical bridge from microcontroller (μC) to screen display device (OSD), erasable and rewritable stored in steel ROM State control that detects the display state of the liquid crystal display device by time sharing with a simple program, and also controls the clock generator to generate an operating clock for controlling the microcontroller (μC) and screen display device (OSD) Generates signals and transfers video signals from the microcontroller (μC) to the screen display (OSD) so that image and pattern operations can be displayed on the LCD Allowed a further cycle time programmable steel, the microcontroller ([mu] C) screen display device and (OSD) but,
A method of operating an arbitrator between a microcontroller and a screen display device, wherein a single EEPROM can be shared through the arbitrator.