CN2842941Y

CN2842941Y - GSM/PHS double-mode submachine series interface debugging information output control circuit

Info

Publication number: CN2842941Y
Application number: CNU2005200678285U
Authority: CN
Inventors: 梁盛; 谢向明
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2005-11-16
Filing date: 2005-11-16
Publication date: 2006-11-29
Anticipated expiration: 2015-11-16

Abstract

The utility model relates to a GSM/PHS double-mode mobile phone serial port debugging information output control circuit. An analog switch is added between serial port signal lines of a GSM/PHS mobile phone; when needing to output debugging information, the utility model switches off serial port signals between a GSM module and a PHS module by controlling the analog switch. The analog switch can be controlled by an AND gate, wherein an output end of the AND gate is connected with the analog switch and two input ends are respectively connected with GPIO ports of the GSM module and the PHS module. The analog switch can also be controlled by an NAND gate, wherein an output end of the NAND gate is connected with the analog switch and two input ends are respectively connected with the GPIO ports of the GSM module and the PHS module. With no influence of normal serial communication of a GSM and a PHS, the utility model can achieve real-time output of software debugging information by controlling the analog switch to be the switched off at any time of so as to effectively solve the problem of mutual interference between the modules when outputting debugging information of the serial ports.

Description

A kind of GSM/PHS dual-mode handset AccessPort information output control circuit

Technical field

The utility model relates to a kind of serial communication control circuit, relates in particular to the AccessPort information output control circuit in the GSM/PHS two-mode mobile phone system.

Background technology

At present, mutual for the real-time implementation cellphone information in the GSM/PHS dual-mode handset, the common method that adopts is to use the serial ports transmission AT of GSM and PHS module to order and realizes.This method is with the serial ports transmitting terminal of GSM and PHS module and receiving end signal interconnection on hardware, and promptly the serial ports transmitting terminal of GSM connects the serial ports receiving terminal of PHS, and the serial ports of GSM is picked the serial ports transmitting terminal that end connects PHS.

The shortcoming that shows of said method is in actual applications: when mobile phone carries out software debugging, need real-time analyzing from serial ports output Debugging message, this time since GSM and PHS module serial ports directly link together physically, so just cause in the time of gsm module output Debugging message, Debugging message also can output to the receiving terminal of PHS module simultaneously, and PHS module output Debugging message the time, Debugging message also can output to the receiving terminal of gsm module simultaneously, GSM and PHS module are in working order the time, when if serial ports receives some improper communication commands, may cause the operating handset state to be made mistakes, influence normal software debugging.

The utility model content

The technical problems to be solved in the utility model is that the problem of the other side's operating state that can influence each other when GSM and PHS module use serial ports transmission Debugging message in the solution prior art provides a kind of control circuit.

The technical solution of the utility model is: increase an analog switch between GSM/PHS mobile phone rs 232 serial interface signal line, when needs output Debugging message, disconnect GSM and PHS intermodule rs 232 serial interface signal by controlling described analog switch.

Analog switch in the technique scheme can be connected with analog switch with the output of door with one and gate control, and two inputs are connected with general I/O (GPIO) mouth of gsm module and PHS module respectively.

Analog switch in the technique scheme also can be controlled with a NAND gate, and the output of NAND gate is connected with analog switch, and two inputs are connected with the general I/O (GPIO) of gsm module and PHS module respectively.

Compared with prior art, the utlity model has following advantage: when not influencing GSM and the normal serial communication of PHS, can realize the real-time output of software debug information by the disconnection of controlling analog switch at any time, thereby effectively solve the mutual interference problem when intermodule is exported AccessPort information.

Description of drawings

Fig. 1 is existing GSM/PHS dual-mode handset serial communication control circuit schematic diagram;

Fig. 2 is the schematic diagram of an embodiment of the present utility model;

Embodiment

Further specify technical scheme described in the utility model below in conjunction with the drawings and specific embodiments.Each signal implication is described below in the accompanying drawing:

TX: serial ports transmitting terminal

RX: serial ports receiving terminal

GSM TX:GSM mobile phone serial ports transmitting terminal

GSM RX:GSM mobile phone serial ports receiving terminal

PHS TX:PHS mobile phone serial ports transmitting terminal

PHS RX:PHS mobile phone serial ports receiving terminal

GPIO1:GSM mobile phones universal I/O (I/O) mouth

GPIO2:PHS mobile phones universal I/O (I/O) mouth

Fig. 1 is existing GSM/PHS dual-mode handset serial communication control circuit schematic diagram.When gsm module need send software debug information to arrive the debugging output port by the TX human hair combing waste, the data that send can be sent to the RX pin of PHS module simultaneously, equally, when the PHS module need send software debug information to arrive the debugging output port by the TX human hair combing waste, the data of transmission also can be sent to the RX pin of gsm module simultaneously.All can disturb the opposing party to work normally when that side of GSM and PHS exports Debugging message like this.

Fig. 2 is the schematic diagram of an embodiment of the present utility model.Increase an analog switch on the Serial Port Line that connects GSM and PHS module, this analog switch should be connected with the GPIO mouth of gsm module and PHS module respectively with two inputs of door with one and gate control.When GSM and PHS carry out normal serial communication, the software GPIO1 mouth output of GSM side is set to high level, the software GPIO2 mouth output of PHS side is set to high level, be output as high level with door this moment, analog switch is a closure state, and gsm module and PHS intermodule can carry out normal serial communication.

When gsm module need send software debug information to arrive the debugging output port by the TX human hair combing waste, the output of the software GPIO1 mouth of GSM side is set to low level, be output as low level with door this moment, analog switch is an off-state, the serial ports of GSM and PHS mobile phone also no longer is communicated with, the Debugging message of GSM TX pin output can directly arrive the debugging output port and can not be transferred to the RX pin of PHS, thus when having avoided gsm module output Debugging message to the interference of PHS module.

When the PHS module need send software debug information to arrive the debugging output port by the TX human hair combing waste, the output of the software GPIO2 mouth of PHS side is set to low level, be output as low level with door this moment, analog switch is an off-state, the serial ports of GSM and PHS mobile phone also no longer is communicated with, the Debugging message of PHS TX pin output can directly arrive the debugging output port and can not be transferred to the RX pin of GSM, thus when having avoided PHS module output Debugging message to the interference of gsm module.

Also can be changed to NAND gate with door in the foregoing description, closure when analog switch is set to the NAND gate output low level accordingly gets final product and disconnect during the NAND gate input high level.

Claims

1, a kind of GSM/PHS dual-mode handset AccessPort information output control circuit, it is characterized in that, between GSM/PHS mobile phone rs 232 serial interface signal line, increase an analog switch, when needs output Debugging message, disconnect GSM and PHS intermodule rs 232 serial interface signal by controlling described analog switch.

2, the described GSM/PHS dual-mode handset of claim 1 AccessPort information output control circuit, it is characterized in that, the device of described control analog switch is one and door, described output with door is connected with analog switch, and two inputs are connected with the general I/O port of gsm module with the PHS module respectively.

3, the described GSM/PHS dual-mode handset of claim 1 AccessPort information output control circuit, it is characterized in that, the device of described control analog switch is a NAND gate, the output of described NAND gate is connected with analog switch, and two inputs are connected with the general I/O port of gsm module with the PHS module respectively.