| 摘要 |
A sensor interface chip. An audio interface unit (102) receives an audio signal transmitted by a device terminal, decodes the audio signal to output alternately a high-level signal and a low-level signal, acquires a digital signal on the basis of the duration of the high-level signal and the low-level signal, where the digital signal comprises an instruction and data that can be executed and processed by a central processing unit (103), and transmits the digital signal to the central processing unit (103). The central processing unit (103) controls on the basis of the digital signal via a sensor interface unit (101) a sensor to start working and transmits a detection signal fed back by the sensor to the audio interface unit (102). The audio interface unit (102) converts the detection signal into an audio signal and transmits same to a terminal device. By integrating into a single sensor interface chip the sensor interface unit connecting sensors of different functions, single-chip integration is implemented and the portability of a product is increased. |
