Detection method for external accessory parts of electronic equipment

Abstract

The invention discloses a detection method for external accessory parts of electronic equipment, and especially relates to a detection method for external accessory parts of low-power consumption IoTequipment. The number of needed connecting wires can be reduced by sharing of an I<2>C interface and a GPIO interface. An electronic equipment host has at least one main chip and two weak pull-down resistors connected to the main chips; each main chip has at least one controller and one interface which can work between an I<2>C mode and a GPIO mode; the controllers are used for detecting the access states of the interfaces, and set the specific work modes of the interfaces according to the demands of a system; and information in external accessory parts can be further read through the I<2>C mode after the controllers finish access discrimination. The detection method can reduce the number of connecting wires by sharing of the interfaces, and the equipment host can be further supported on automatic judgement of access accessory part types and information collection and control of accessory parts without influencing original functions.

Description

technical field [0001] The invention belongs to the field of detection circuits of electronic equipment, in particular to a detection method for external accessories of low-power Internet of Things electronic equipment. Background technique [0002] With the rapid development of electronic technology, the integration of main chips is getting higher and higher, and the functions of electronic equipment are becoming more and more complex. However, the hardware design of the main body of different electronic devices is often exactly the same, while the sensors and actuators in the external accessories of the electronic devices are different. In order for the electronic device to actively detect the reliable insertion and removal of the external accessory, and read what kind of accessory the external accessory is, it is particularly important to perform corresponding data reading and control. At this time, there will be a large number of signal lines between the main body of th...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome various problems in the detection and identification of electronic product equipment and accessory accessories in the prior art, make full use of the characteristics that the external pins of the new main chip can be flexibly configured in various working modes, and reuse GPIO and I 2 For the pins of the C bus, only adding 2 weak pull-down resistors can complete the reliable detection of the insertion and removal of accessories, and further support the main electronic product body to automatically judge the type of accessories and read the data of the access accessories or control

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