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您好，
请参考手册17.3.9 SPI High-Speed Mode详细描述。
The SPI module is capable of reaching full-duplex communication speeds up to LSPCLK/4 (where
LSPCLK equals SYSCLK). For the maximum rated speed, refer the device Data Manual.
In order to achieve the maximum full-duplex speeds, two restrictions are placed on the design:
• High-speed capability is available on a single pin mux option
• Single master to single slave configuration is supported to limit the loading on the pins.
When configuring the GPIOs to support High-Speed mode, refer to GPIOs Required for High-Speed Mode
for more information.
