SAA7113 initialization data and control video decoding chip SAA7113 initialization and control Abstract: This paper first briefly introduces the characteristics and applications of video decoding chip SAA7113, then introduces the register configuration during initialization, the method of controlling 7113 with 51 single-chip microcomputer, and finally gives the assembly program and control method for initializing 7113. Keywords: video decoding SAA7113 I2C bus initialization Introduction: SAA7113 is a kind of video decoding series chip of Philips, which is very representative and is used in many video products such as TV cards, MPEG2, MPEG4. After being familiar with the principle of 7113, it will be easy to understand other series chips SAA7114, 7115, 7118. The main function of SAA7113 is to decode the input analog video signal into a standard \"VPO\" digital signal, which is equivalent to an \"A/D\" device. 7113 is compatible with various video standards around the world. When used in my country, the internal registers must be configured according to my country\'s video standards, that is, initialized. Otherwise, 7113 cannot output as required. It can be said that the main work of developing 7113 is how to initialize. 7113 initialization needs to be carried out through the I2C bus. This article gives an example of using 51 single-chip microcomputer control. 1. Basic principles and applications of SAA7113 SAA7113 is a video decoding chip. It can input 4 analog video signals. Through different configurations of internal registers, it can convert 4 inputs. The input can be 4 CVBS or 2 S video (Y/C) signals. The output is 8-bit \"VPO\" bus, which is a standard ITU 656, YUV 4:2:2 format. 7113 is compatible with multiple formats such as PAL, NTSC, and SECAM. It can automatically detect the applicable field frequency of 50 or 60Hz and can automatically switch between PAL and NTSC. The 7113 has a series of registers inside that can be configured to different parameters. The control of chromaticity, brightness, etc. is done by rewriting different values in the corresponding registers. The reading and writing of the registers need to be done through the I2C bus. The analog and digital parts of the 7113 are both powered by +3.3V, and the digital I/O interface is compatible with +5V...
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