US 11,989,150 B2
Interface circuit, and method and apparatus for interface communication thereof
Huaming Chen, Guangdong (CN); and Honghua Lu, Guangdong (CN)
Assigned to AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Guangdong (CN)
Filed by AUTEL INTELLIGENT TECHNOLOGY CORP., LTD., Guangdong (CN)
Filed on Apr. 12, 2022, as Appl. No. 17/658,859.
Application 17/658,859 is a continuation of application No. PCT/CN2020/120437, filed on Oct. 12, 2020.
Claims priority of application No. 201910996120.4 (CN), filed on Oct. 18, 2019.
Prior Publication US 2022/0327087 A1, Oct. 13, 2022
Int. Cl. G06F 13/42 (2006.01); G05B 23/02 (2006.01); G06F 13/20 (2006.01); G06F 13/38 (2006.01); H04L 69/08 (2022.01); H04L 69/18 (2022.01)
CPC G06F 13/4282 (2013.01) [G06F 13/20 (2013.01); G06F 2213/0042 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An interface circuit, comprising a USB HOST interface, a USB SLAVE interface, an HDMI interface, a first conversion unit, a second conversion unit, and a micro-control unit, wherein
output interfaces of the micro-control unit are connected to an input terminal of the first conversion unit and an input terminal of the second conversion unit, respectively, an output terminal of the first conversion unit is connected to the USB HOST interface and the USB SLAVE interface, respectively, and an output terminal of the second conversion unit is connected to the HDMI interface;
the micro-control unit is configured to control the first conversion unit to be set in a HOST mode when receiving a trigger signal from the USB HOST interface so as to establish communication between the micro-control unit and the USB HOST interface;
the micro-control unit is further configured to control the first conversion unit to be set in a SLAVE mode when receiving a trigger signal from the USB SLAVE interface so as to establish communication between the micro-control unit and the USB SLAVE interface; and
the micro-control unit is further configured to control the second conversion unit to output a TMDS signal when receiving a trigger signal from the HDMI interface so as to establish communication between the micro-control unit and the HDMI interface, wherein the first conversion unit comprises a USB SWITCH, wherein the USB SWITCH comprises a power supply circuit, wherein the power supply circuit comprises a first resistor.