Circuit and operating method for integrated interface of PDA and wireless communication system

1. A circuit for an integrated interface of a PDA and a wireless communication system, suitable for integrating the PDA and the wireless communication system, the circuit comprising:

a first serial port, having two terminals, wherein one of the two terminals is electrically connected to the PDA, another one of the two terminals is electrically connected to the wireless communication system, and the first serial port is used to bi-directionally transmit a control signal between the PDA and the wireless communication system; and

a second serial port, having two terminals, wherein one of the two terminals is electrically connected to the PDA, another one of the two terminals is electrically connected to the wireless communication system, and the second serial port is used to bi-directionally transmit audio data between the PDA and the wireless communication system.

2. The circuit of claim 1 , further comprising a power system, the power system providing a power to the PDA and the wireless communication system respectively, and determining the magnitude of the power provided to the PDA according to an idle signal transmitted from the PDA.

3. The circuit of claim 2 , wherein the power system provides a power-shortage signal to the PDA and the wireless communication system respectively when the power is insufficient.

4. The circuit of claim 1 , wherein the first serial port is further used to transmit status data of the wireless communication system.

5. The circuit of claim 4 , wherein the status data includes an antenna intensity.

6. The circuit of claim 1 , wherein the audio data is digital data.

7. The circuit of claim 6 , wherein the wireless communication system includes a wireless communication element used for receiving an electromagnetic wave signal, and the electromagnetic wave signal is converted into the digital data.

8. The circuit of claim 7 , wherein the PDA includes an audio element for receiving the digital data through the second serial port.

9. An operating method for an integrated interface of a PDA and a wireless communication system, suitable for integrating the PDA and the wireless communication system, the operating method comprising:

using a first serial port to bi-directionally transmit a control signal between the PDA and the wireless communication system; and

using a second serial port to bi-directionally transmit audio data between the PDA and the wireless communication system.

10. The method of claim 9 , wherein the audio data is digital data.

11. The method of claim 10 , further comprising:

receiving an electromagnetic wave signal by a wireless communication element; and

converting the electromagnetic wave signal into the digital data.

12. An operating method for an integrated interface of a PDA and a wireless communication system, suitable for integrating the PDA and the wireless communication system, the operating method comprising:

using a first serial port to transmit a control signal between the PDA and the wireless communication system;

using a second serial port to transmit audio data between the PDA and the wireless communication system; and

when the PDA is turned on, performing the following steps:

turning on the PDA; and

turning on the wireless communication system by the PDA.

13. The operating method of claim 12 , further comprising:

resetting the wireless communication system after turning on the wireless communication system.

14. The operating method of claim 13 , further comprising:

after resetting the wireless communication system and waiting for a first predetermined period of time, checking a status of the wireless communication system;

if the status of the wireless communication system is normal, the turn-on-device is completed; and

if the status of the wireless communication system is abnormal, displaying an error message to indicate that turning on the wireless communication system is in failure.

15. The operating method of claim 12 , wherein the step of turning on the wireless communication system by the PDA, further comprising:

transmitting a PDA-turn-on-wireless-communication-system signal from the PDA to the wireless communication system to turn on the wireless communication system.

16. A circuit for an integrated interface of a PDA and a wireless communication system, suitable for integrating the PDA and the wireless communication system, the circuit comprising:

a first serial port, having two terminals, wherein one of the two terminals is electrically connected to the PDA, another one of the two terminals is electrically connected to the wireless communication system, and the first serial port is used to transmit status data of the wireless communication system between the PDA and the wireless communication system; and

a second serial port, having two terminals, wherein one of the two terminals is electrically connected to the PDA, another one of the two terminals is electrically connected to the wireless communication system, and the second serial port is used to transmit audio data between the PDA and the wireless communication system.

17. The circuit of claim 16 , wherein the status data includes one of an antenna intensity and a battery capacity.

18. The circuit of claim 16 , wherein the audio data is digital data.

19. The circuit of claim 18 , wherein the wireless communication system includes a wireless communication element used for receiving an electromagnetic wave signal, and the electromagnetic wave signal is converted into the digital data.

20. The circuit of claim 19 , wherein the PDA includes an audio element for receiving the digital data through the second serial port.

21. The circuit of claim 16 , wherein the status data includes an antenna intensity.