串行外设接口（SPI）fpga 被动接收,在下降沿 采集数据并发送数据 1BYTE,要求mcu在末端采集数据。并在下降沿之前准备好数据。-Serial Peripheral Interface (SPI), The fpga passive receiving, at the falling edge of data collection the send data 1BYTE, mcu data collected at the end. And the data ready before t

同步串行外设接口，它可以使MCU与各种外围设备以串行方式进行通信以交换信息。传输的数据为8位，在主器件产生的从器件使能信号和移位脉冲下，按位传输，高位在前，低位在后。,Synchronous serial peripheral interface, it can make the MCU with a variety of peripheral devices to communicate in order to exchange information in a serial manner.

串行外设接口 <SPI>模块是一个同步串行接口,可用于与其他外设或者单片机进行通信。这些外设可以是串行EEPROM、移位寄存器、显示驱动器和A/D转换器等。SPI模块与Motorola的SPI和STOP接口兼容。(The serial peripheral interface <SPI> module is a synchronous serial interface, which can be used to communicate with other periph