– SD 3.0 introduces UHS-I (up to 208 MHz @ 1.8V), but eMMC 4.4 still uses 3.3V or dual voltage. The guide emphasizes level shifters if mixing 1.8V I/O on the host with 3.3V eMMC.
This appears to cover an AHB-based SD/MMC host controller (SD 3.0 spec) talking to eMMC 4.4 devices. Likely from an SoC vendor's IP block (maybe Synopsys or a proprietary ARM-based design).
The doc hints at tuning support but it's vague. Would love real-world timing param examples. sd3.0-host-ahb-emmc4.4-usersguide-ver5.9-jan11-10.pdf
The "sd3.0-host-ahb-emmc4.4-usersguide-ver5.9-jan11-10.pdf" document serves as the Synopsys DesignWare User Guide for a specialized mobile storage host controller, facilitating communication between processors and SD/eMMC storage via an AHB bus. This 2010-era documentation is crucial for integrating SD 3.0 (UHS-I) and eMMC 4.4 standards, enabling data transfers of up to 104 MB/s through features like ADMA2 and CRC hardware. For more details, visit Synopsys .
The "sd3.0-host-ahb-emmc4.4-usersguide-ver5.9-jan11-10.pdf" document outlines a high-performance Secure Digital (SD) 3.0 and eMMC 4.4 Host Controller IP core designed for System-on-Chip (SoC) integration using the AMBA AHB protocol. This 2011 guide details hardware support for UHS-I SD cards up to 2TB and eMMC 4.4 storage with 8-bit bus functionality to achieve high-speed data transfer rates. For detailed product information, visit Arasan . Arasan First to release SD3.0 Family of Host Controller IPs – SD 3
eMMC 4.4 introduced . The host controller must access EXT_CSD register (offset 0x0140).
This controller uses AHB split transactions . Do not poll the FIFO status in a tight loop; use DMA (Descriptor-based). The host acts as an AHB master to write directly to system RAM. Likely from an SoC vendor's IP block (maybe
– With AHB at maybe 66–133 MHz, throughput to eMMC 4.4 (max ~52 MB/s in HS DDR) can get limited by bus arbitration. Pay attention to burst lengths.
SD3 0 SDIO3 0 eMMC5 0 Host Controller - Rev 1.0 2 | PDF - Scribd