The hardware connection between the MCU and the MC33664

[kevinyuee]

Hi,
   Why is it that in the connection between the mcu and the mc33664, the wiring of the two data sheets for the mcu to receive data from the mc33664 is different? One uses miso and the other uses mosi?

   Which one is correct?
   
  

[guoweisun · Accepted solution]

这个是对的

[kevinyuee]

如果spi2是通过miso去接收数据的话，MCU就应该是主机把，可是为什么图上是mc33664提供的时钟？另外我在上电的时候拉高了mc33664的en引脚，同时捕获到了INTB的校验，也能通过示波器能看到我的spi1发送的sclk是2mhz满足mc33664的要求，但是我并没有在mc33664的另一端tpl有观察到电平的变化，两根都是一直拉高的状态。