Up to 6 SPIs with 4 with muxed duplex I2S for audio class accuracy via internal audio PLL or external clock and up to 5 x SPI (from 5 x USART when configured in synchronous mode)**

STM32H723规格书上的这句话，怎么理解呢？STM32H723ZGT6有多少个独立的SPI呢？如果不从USART配置的话

手册上明确了有6个独立的SPI外设。