哇酷®开发者社区(WhyCan® Forum)

我看数据手册明确写了
2.2.3 SMHC
• Three SD/MMC host controller (SMHC) interfaces
• The SMHC0 controls the devices that comply with the protocol Secure Digital Memory (SD mem-version
3.0)
• The SMHC1 controls the device that complies with the protocol Secure Digital I/O (SDIO-version 3.0)
• The SMHC2 controls the device that complies with the protocol Multimedia Card (eMMC-version 5.0)
• Maximum performance:

• SDR mode 150 MHz@1.8 V IO pad

• DDR mode 50 MHz@1.8 V IO pad

• DDR mode 50 MHz@3.3 V IO pad
  • Supports 1-bit or 4-bit data width
  • Supports block size of 1 to 65535 bytes
  • Internal 1024-Bytes RX FIFO and 1024-Bytes TX FIFO
  • Supports card insertion and removal interrupt
  • Supports hardware CRC generation and error detection
  • Supports descriptor-based internal DMA controller
  是不是就要SDC2就行？但是SDC2的引脚只有D0-D3 CLK CMD，能直接接吗？好像还缺点什么吧