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基本概念 Motorola首先在其MC68HCXX系列处理器上定义的 SPI(Serial Peripheral Interface–串行外设接口)总线系统是一种同步串行外设接口,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。在主器件的移位脉冲下,数据按位传输,低位在前,高位在后。 SPI总线可直接与各个厂家生产的多种标准外围器件相连,包FLASH、EEPROM、网络控制器、LCD...
https://community.arm.com/thread/3104 TCMs are connected directly to the processor, not through the bus. So you don't have bus arbitration or the overhead of the bus protocol when you speak to them....