Electronic equipment with USB interface and USB communication starting method thereof
A technology of USB interface and electronic equipment, applied in the USB field, can solve problems such as damage to mobile phone terminal equipment, and achieve the effect of avoiding damage
Active Publication Date: 2014-09-17
DRNC HLDG INC
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] The purpose of the present invention is to provide an electronic device with a USB interface and a method for starting the USB communication thereof, aiming at the problem in the prior art that the charger and the USB communication share an interface and easily cause damage to the mobile phone terminal equipment. Electronic equipment, including a power management chip and a baseband chip, the communication interface of the baseband chip is connected to the communication interface of the power management chip, the power management chip includes a charging voltage VCHG pin used to connect to the positive pole of the charger, and the general input and output GPIO of the baseband chip port and the positive USB_VBUS pin of the USB bus of the USB interface of the baseband chip
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0031] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. The first embodiment of the present invention is an electronic device 100 with a USB interface. figure 2 , the device 100 is explained in principle, the device 100 includes: a power management chip 102 and a baseband chip 103, the communication interface 104 of the baseband chip 103 is connected to the communication interface 105 of the power management chip 102, the power management chip 102 includes a charging Voltage VCHG pin 106 and ground pipe 107, VCHG pin 106 and ground pipe 107 are respectively connected to the positive pole and negative pole of the external charger 101, the baseband chip 103 includes a general input and output GPIO port 108 and a USB interface part 109, the general input The positive USB_VBUS pin 110 of the power supply of the USB bus that outputs the GPIO port 108 and the USB interface part 109 is shorted.
[0032] A prefe...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides an electronic device with a USB interface and a method for starting the USB communication thereof, so as to solve the problem in the prior art that the charger and the USB communication share an interface and easily cause damage to the mobile phone terminal equipment. The GPIO port of the baseband chip of the equipment It is connected to the USB_VBUS pin of the USB interface part of the baseband chip, and based on this circuit, the power management chip detects the plugging and unplugging status of the charger, and generates a corresponding interrupt request. The baseband chip controls the corresponding level of the GPIO output according to the interrupt request. The port is connected to the USB_VBUS pin, and the output level of the GPIO is controlled by software, so that the USB_VBUS pin is high or low, and then used as a trigger signal to start or stop USB communication, avoiding damage to the device.
Description
technical field [0001] The invention relates to the technical field of USB, in particular to an electronic device with a USB interface and a USB communication starting method thereof. Background technique [0002] For electronic devices with a USB interface in the prior art, such as a handheld terminal with a USB interface, the USB communication cable and the charging cable share one cable, that is, the cable can be used for both charging and USB communication. In this way, the positive VCHG of the charging interface of the mobile phone and the USB_VBUS are directly or indirectly shorted together. [0003] There are two pins in the USB interface circuit of the handheld terminal device, one pin is the charging voltage VCHG on the power management chip, and its function is to detect the plug-in and pull-out status of the charger. , it is judged that the charger is plugged in, and when the voltage value of the VCHG terminal is less than or equal to a certain threshold (such as...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H04M1/725G06F13/38H04M1/72409
CPCG06F13/385G06F13/4295H02J2007/0062H02J7/00G06F1/26
Inventor 邵永平时慧钦徐敏王涛姚铁锐张晓峰
Owner DRNC HLDG INC