What is the PWM (Pulse Width Modulation) VGA Interface?

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What is PWM (Pulse Width Modulation): http://www.shenmeshi.com/Science/Science_20070315160722.html

 

PWM (Pulse Width Modulation)-pulse width modulation (PWM) is an on/off type regulated power supply application. It is a very effective technology that uses the digital output of a microprocessor to control analog circuits.

With the development of electronic technology, a variety of PWM technologies have emerged, including: phase voltage control PWM, pulse width PWM method, Random PWM, PWM method, line voltage control PWM, etc, the PWM code is a pulse width modulation code, which consists of 9 ms high voltage and 4 Ms low-level guided pulse, 16-bit system identification code, 8-Bit Data positive code and 8-bit data back code. The data code is what I want to solve. The 0 of a PWM code is composed of a 0.58ms low level and a 0.58ms high level. 1 is composed of a 0.58 Ms Low-voltage flat and a 1.58 Ms high level.

PWM decoding principle:

First, the boot code is thrown out through latency, then the 16-bit system identification code is discarded through decoding, and finally the system positive and reverse codes are obtained. After unlocking, the positive code is reversed to see if it is the same as the reverse code. If it is the same, it is unlocked to save its value. Decoding 0 or 1 is like this. Wait at the low level until the high level, use a 0.882 ms delay to remove the amount, after the amount, if it is low, it is proved that the front is a 0.58 Ms low level and a 0.58 Ms high level, that is, save a 0. if it is high, it is proved to be composed of a 0.58 Ms Low-Power flat ground and a 1.58 Ms high level, that is, a 1. if it is 1, call another delay to extend it to the low level. Repeat the above process after waiting for the High Level to decode. Remote Control decoding program Introduction: Through the above decoding principle, the width of the PWM code is measured using the Interrupt Port of the single chip microcomputer. Through the remote control provided by this experiment, the single chip microcomputer is decoded and displayed on the digital tube. For example, infrared remote control.

 

 

Pulse Width Modulation PWM: http://zhidao.baidu.com/question/15438897.html

 

Pulse Width Modulation (PWM) is a term used in switching regulated power supply. This is classified by the control mode of voltage regulation. In addition to the PWM type, there are also PFM type and PWM, PFM hybrid. The pulse width modulated (PWM) switching voltage regulator circuit adjusts the duty cycle through voltage feedback without changing the output frequency of the control circuit to achieve stable output voltage.

What does the VGA interface mean?

VGA is short for video graphics adapter (array). The signal type is analog. The interfaces on the display card end are 15-pin sockets, and the interfaces on the display connection end are 15-pin male :. Computer Video analog signal graphic interface