Identification method for external module and electronic equipment using same

Abstract

The invention discloses an identification method for an external module. The method comprises the following steps of: connecting a first port of a control chip with a second port of the external module; connecting one end of a resistor between the first port and the second port; grounding the other end of the resistor; setting the first port as an output mode and an input mode; outputting a high level in the output mode; further reading pins levels of the first port in the output mode and the input mode; and judging the connection mode of the second port according to the pin levels to judge the type of the external module. The invention also discloses electronic equipment. In the mode, the technical scheme provided by the invention can save cost and pin resources, and has the advantages of simplicity and practicability.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to an identification method of an external module and an electronic device using the method. Background technique [0002] Along with the increasing sales of electronic equipment such as mobile phones, PDAs (Personal Digital Assistants) and notebooks, electronic equipment manufacturers certainly hope that the same electronic equipment can preferably use the same external module (such as a display screen and camera and other external modules relative to the processor). However, due to the limited supply capacity of external module suppliers, electronic equipment manufacturers often make some compatible designs when manufacturing electronic equipment, so that electronic equipment can be compatible with external modules provided by different suppliers, so that they can be used in Some suppliers turn to different kinds of external modules provided by other suppliers when the supply...

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Problems solved by technology

[0004] However, the problem faced by the above method is that due to the many functions of the electronic device, the control chip is used to connect the basic input and output pins of the ID pins of the external modules Limited, in order to save the pin resources of the control chip and external devices, an ID pin is usually set in the external module, so that the control chip only uses a basic input and output pin to connect to the ID pin, but it can be seen from the above analysis , defining an ID pin can only distinguish two types of external modules, and there may be more than two suppliers, so it is necessary to provide an electronic device-based external device identification method and device to solve the above problems

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