如何给便携式设备添加音乐和数据传输功能

Traditionally, analog radio solutions have too many components and limited programmability, making the addition of RDS too challenging. With limited memory and only half of the four available RDS blocks in an RDS group, the host processor must clear the FM receiver’s RDS memory buffer before it is able to decode and present the second half of the RDS group. This process requires complex host processor statemachine programs to poll and parse the constant stream of RDS data presented, consuming MIPS and power in the process.

New digital solutions typically offer more on-chip processing and larger memories, requiring much less interaction and processing from the host. In some cases, digital solutions have decreased the overall size of the host software for an analog solution by over 75 percent, resulting in free host memory for other applications or cost savings.

Digital solutions are able to maintain a high-level of performance while integrating advanced RDS pre-processing for simple programming at excellent cost levels. Ideal RDS solutions also support all RDS block error correction and information, requiring very little host processor work and far less complex host software.

As portable devices become more multi-functional, smaller and more central to the consumers’ communications and entertainment experience, the ability to add popular features like AM and FM radio will be important for portable device makers. It is up to the semiconductor supplier to overcome historical challenges with integrating complex, analog-centric features. Innovation in digital architectures can completely change the economics of adding these features and make it simple to design, more reliable to manufacture, more cost effective, and retain the user experience.