US 2012/0231835 A1Published application

Dual-mode digital mobile communication terminal enabling CDMA and GSM

AssigneeZte Corporation

InventorsYongliang Zhang, Ran Qi, Lei Ma, Fangxi Hou

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Abstract

A dual-mode digital mobile communication terminal enabling Code Division Multiple Access (CDMA) and Global System for Mobile Communications (GSM) is disclosed, in which a processing module functions as a core; both CDMA and GSM wireless modules can be controlled; functions of high performance Bluetooth, camera, and FM receiver, etc. can be expanded; program downloading, debugging information printing and radio calibration, etc. can be implemented in various application states under the two wireless standards, through a five-pin micro USB interface and an eight-pin micro USB interface which are reserved for users, and an optimal arrangement of a series of internal analog switches, use of the interface resources may be maximized and the interfaces may be simplified; further, in the disclosure, various voice application states, such as handheld, earphone, hand-free and bluetooth, can be switched from one to another seamlessly and smoothly; and the hardware compatibility of a dual-mode dual-standby machine enabling CDMA and GSM with a dual-mode single-standby machine enabling CDMA and GSM can be achieved.

A dual-mode digital mobile communication terminal enabling Code Division Multiple Access (CDMA) and Global System for Mobile Communications (GSM), comprising:

a first Universal Serial Bus (USB) connector, a second USB connector, an application processing module, a CDMA wireless module, a GSM wireless module, a first analog switch, a second analog switch, a third analog switch and a fourth analog switch, wherein
the first USB connector is connected with a Universal Asynchronous Receiver/Transmitter (UART) interface of the application processing module through the first analog switch to print UART debugging information;
the first USB connector is connected with a USB interface of the application processing module through the first analog switch to perform USB-downloading of a program for an application side;
the second USB connector switches between the GSM wireless module and the CDMA wireless module through the second analog switch;
the second USB connector is configured to output the debugging information of the GSM wireless module and perform radio calibration when the second USB connector switches to the GSM wireless module, and to perform the USB-downloading at a CDMA wireless side and output the debugging information or output UART debugging information at the CDMA wireless side when the second USB connector switches to the CDMA wireless module;
the third analog switch is located in a position where the second analog switch is connected with the fourth analog switch, and the fourth analog switch is located in a position where the third analog switch is connected with the CDMA wireless module, i.e., when the second USB connector is connected with the CDMA wireless module through the second, third and fourth analog switches, the CDMA wireless module is not controlled by the application processing module, and is configured to perform the USB-downloading at the CDMA wireless side and the debugging information output;
the third analog switch is located in a position where the second analog switch is connected with the CDMA wireless module, and the fourth analog switch is located in a position where the CDMA wireless module is connected with the application processing module, i.e., when the second USB connector is connected with the CDMA wireless module through the second and third analog switches, and the application processing module is connected with the CDMA wireless module through the fourth analog switches, the CDMA wireless module is controlled by the application processing module, and is configured to output the UART debugging information at the CDMA wireless side.

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Abstract

Claims14