SD v4.51 Controller

Versal ACAP Technical Reference Manual (AM011)

Document ID
Release Date
1.5 English

The controller communicates with SDIO devices, SD memory cards, and eMMC devices. The controller modes use up to eight data signals.

The controller's 32-bit registers are accessed via an AXI programming interface. The register set includes a data port to read from and write the I/O port. The SD/eMMC I/O interface is routed through the PMC MIO or the EMIO. The I/O interface is not available through the LPD MIO.

The controller also includes an AXI interface for the dual-mode DMA controller. The DMA controller has a simple programming mode and a descriptor based mode.


The PMC includes two identical SD_eMMC v4.51 controllers.

SD_eMMC v4.51 Controller

The SD_eMMC v4.51 controller is compatible with the following specifications:

  • SD host controller standard specification version 3.00
  • SD memory card specification version 3.01
  • SD memory card security specification version 1.01
  • SDIO card specification version 2.0, 3.0
  • eMMC specification version 4.51