Chrysanthemum chain SPI integrated circuit and operation method thereof

A daisy chain sequence peripheral interface (SPI) integrated circuit and a method of operation thereof are provided. The daisy chain SPI integrated circuit comprises a first MISO interface circuit, a second MISO interface circuit, a first data enabling interface circuit and a second data enabling interface circuit. When the daisy chain SPI integrated circuit is a target slave circuit selected by the main integrated circuit for reading target data, the first data enabling interface circuit outputs a data enabling signal to the main integrated circuit, and the first MISO interface circuit returns the target data to the main integrated circuit based on the time sequence of the data enabling signal. When the daisy chain SPI integrated circuit is not the target slave circuit, a signal received by the second data-enabled interface circuit is transmitted to the first data-enabled interface circuit, and data received by the second MISO interface circuit is transmitted to the first MISO interface circuit. According to