Host mode controller

• Four I/O signals (MIO or EMIO)
• Command, Clock, CD, WP, Pwr Ctrl (MIO or EMIO)
• LED control, bus voltage (EMIO)
• Interrupt or polling driven
• AHB master-slave interface operating at the CPU_1x clock rate
• Master mode for DMA transfers (with 1 KB FIFO)
• Slave mode for register accesses

SDIO Specification 2.0

• Low-speed, 1 KHz to 400 KHz
• Full-speed, 1 MHz to 50 MHz (25 MB/sec)
• High-speed and high-capacity memory cards