| 摘要 |
<p>An audio service processing circuit includes a storage unit (20), a microprocessor (10), a bus control unit (30) and an audio service processing unit (60), in which the said storage unit (20) is used to store the application program instruction and the audio service data; the said microprocessor (10) is used to read the application program instruction in the said storage unit (20), and generate the signal accessed by the system bus in order to access the said storage unit (20) and the said audio service processing unit (60) on the system bus; the said bus control unit (30) is used to provide the function that the said microprocessor (10) controls the system bus; the said audio service processing unit (60) is used to receive the key information through the key interface and generate DTMF/FSK audio signal to be transmitted to the speaker interface and drive the speaker sound. There is also an audio card terminal having the audio service processing. It is resolved in the invention that the service function of the audio card terminal is not realized in the case of ensuring low cost in the art.</p> |
