Research And Application On Bus Technology In HTiB

With the development of all kinds of integration techniques, the consumer electronics have exceeded the single function mode, and are developing into multi-function, intelligent, and wireless.The audio and video products of single function cannot meet the requirement of consumer.So, the market need the product that integrated multi functions. Home Theater in a Box( HTiB) is a kind of consumer electronics that is based on DVD player, and integrate the amplifier system, radio system into one product.Because of complex function, this HTiB product includes quite a number of ICs with special function. To realize the function of control and transfer between those ICs, the system designer should choose the buses based on the feather of ES6028 and the format of data stream. In the HTiB system, the system designer adopts I2C bus, I2S bus and CCB bus etc. During this developing stage, the most important tasks for us are: Research protocol of these kinds of Bus, implement the driver of these kinds of Bus based on the hardware of target. realize the control function for the digital amplfier IC PS9702B through I2C bus,implement Equliazer function for audio. realize the control function for the A/V Switch IC M52790 through I2C bus, implement A/V switch function.realize the control function for the △∑ audio A/D conversion IC PCM1606 and △∑ audio D/A conversion IC PCM1800 through I2S bus.realize the data transfer and control function for the tuner IC LC72131 through CCB bus, add the function auto-scan function for the tuner. adjust the priority of the function to assure the system run exactly.HTiB is a complex embeded system. In this system, the compiler and simulator tool are provided by ESS.From the test rusult, the HTiB system implements the audio amplifier function, A/V Switch function, tuner function, etc. This HTiB has been launched into market successfully.