| 摘要 |
An exemplary serial peripheral interface circuit includes a host, a plurality of slaves, and a decoder. A data output terminal, a data input terminal, and a serial clock terminal of the host are connected to a data input terminal, a data output terminal, and a serial clock terminal of each slaves respectively. A slave select terminal of the host is connected to a data receive terminal of the decoder. GPIO pins of the hot are connected to corresponding input terminals of the decoder correspondingly. A select terminal of each slave is connected to a corresponding output terminal of the decoder. The address generated by the GPIO pins controls the decoder, so that the select terminal of the host can be connected to a corresponding slave device via the decoder.
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