The controller provides I/O signals for SDIO and eMMC interfacing. These interface signals are routed to the PMC MIO pins.
- SD and SDIO
Each I/O interface is routed separately through the PMC MIO or the PL EMIO. The interface is not available through the LPD MIO. The SD I/O interface signals includes 1 and 4-bit data with card detect, and write protect. The interface also includes signals to control an optional external voltage level shifter for interfacing to the devices at 3.3V and switching to 1.8V for higher speed, SD 3.0 functionality.
The I/O interface signals are listed in SD I/O Signals.
I/O Wiring Diagrams
The I/O wiring connections for boot modes are shown in SD Boot Modes.