Cyclone® V Hard Processor System Technical Reference Manual

ID 683126
Date 8/28/2023
Public
Document Table of Contents

15.1.1. SD Card Support Matrix

Table 124.  SD Card Support Matrix
Device Card Type Voltages Supported42 Bus Modes Supported Bus Speed Modes Supported
Default Speed High Speed SDR12 SDR2543
3.0 V 1.8 V 44 1 bit 4 bit 8 bit 12.5 MBps 25 MHz 25 MBps 50 MHz 12.5 MBps 25 MHz 25 MBps 50 MHz
SDSC (SD)          
SDHC  
SDXC  
eSD  
SDIO  
eSDIO
Note: Card form factors (such as mini and micro) are not enumerated in the above table because they do not impact the card interface functionality.
42 Because SD cards initially operate at 3.0 V and can switch to 1.8V after power-up and the BSEL values are constant during the boot process, transceivers are required to support level-shifting and isolation.
43 SDR25 speed mode requires 1.8‑V signaling. Note that even if a card supports UHS‑I modes (for example SDR50, SDR104, DDR50) it can still communicate at the lower speeds (for example SDR12, SDR25).
44 Where supported, external transceivers are needed to switch the voltage.