Basic knowledge about smartphones

There are 3 main hardware implementations of mobile phones: (three kinds of hardware schemes)
Use only baseband chips, often called feature phones.
Baseband Chip plus coprocessor (CP, usually a multimedia accelerator). This kind of product to MTK program as a typical representative, MTK a full range of products are basically the solution, Spreadtrum and other companies are pushing similar products. This is the feature phone that enhances the multimedia function.
Baseband chip + Application processor (AP), also known as the smartphone (smart phone). Some programs will apply the processor and baseband processor to the inside of a chip, such as high-pass msm7200a. It has a ARM11 core (application processor) and a ARM9 core (baseband processor), both communicating through shared memory. Of course, smartphones can also use a coprocessor that enhances AV processing capabilities.
In smartphones, the implementation of mobile phone functions is based on the application processor (AP) and the baseband chip provides communication functions. The AP can be regarded as a computer, the baseband chip as the wireless modem of the AP. This wireless modem provides functions such as calls, short messages, Internet access, UIM cards, etc. through the at interface.

This article is from the "Cool Ice" blog, please make sure to keep this source http://liangbing8612.blog.51cto.com/2633208/1590571

Basic knowledge about smartphones