SPI通信：串行flash的读写擦除命令通过SPI接口进行通信。?
CPU芯片与FPGA通过SPI接口进行通信。?
其他功能集成电路芯片参数寄存器配置。例如DAC芯片内部有很多寄存器（因为芯片有很多功能，要通过设置寄存器不同的开关来打开或关闭相应的功能，一上电去初始化寄存器）需要我们去配置。FPGA一上电也是通过配置芯片里边来读取数据，然后配置FPGA内部的SRAM。FPGA是读取FLASH里边的串行数据，读取完校验完才配置到我们的FPGA的SRAM中去。速度比串口快，而且是同步传输。(The read and write erasure commands of the serial flash communicate through the SPI interface.
The CPU chip communicates with the FPGA through the SPI interface.
Other functional integrated circuit chip parameters register configuration.
For example,there are many registers in the DAC chip (because the chip has many functions. We need to configure it by setting up different registers to open or close the corresponding functions, and initializing registers on the battery. FPGA also reads the data by configuring the chip, and configures the SRAM inside the FPGA. FPGA is a serial FLASH read the data inside,read check after all the configuration to the FPGA SRAM to).
The speed is faster than the serial port, and it is synchronous transmission.)