| 摘要 |
<p>Embodiments of the present invention provide an interface expanding circuit, an interface expanding connecting method, and an embedded system, so that when a south bridge chip accesses one BIOS (basic input out system) chip in two BIOS chips, a CPU can update the other BIOS chip. The interface expanding circuit comprises a switching connecting circuit. The switching connecting circuit is connected with at least two BIOS chips, and is used for connecting a first BIOS chip in the at least two BIOS chips with an SPI (serial peripheral interface) arranged on the south bridge chip, and is further used for connecting at least one second BIOS chip in the at least two BIOS chips except the first BIOS chip with a circuit capable of providing the SPI, so that the second BIOS chip can be updated through the switching connecting circuit and the circuit capable of providing the SPI.</p> |
