Sd Card Support Matrix - Altera cyclone V Technical Reference

14-2

SD Card Support Matrix

Unsupported Features
• Card Detect is only supported on interfaces routed via the FPGA fabric. The Card Detect Interface
signals are not included if the interface is pinned out to HPS I/O.
• The SD/MMC controller does not directly support voltage switching, card interrupts, or back-end
power control of eSDIO card devices. However, you can connect these signals to general-purpose I/Os
(GPIOs).
• The SD/MMC controller does not contain a reset output as part of the external card interface. To reset
the flash card device, consider using a general purpose output pin.
Related Information
MMC Support Matrix
•
For more information on what is supported, refer to the MMC Support Matrix table.
Supported Flash Devices for Cyclone V and Arria V SoC
•
For more information, refer to the supported SD/SDHC/SDXC/MMC/eMMC flash devices section on
this page.
SD Card Support Matrix
Table 14-1: SD Card Support Matrix
Device Card
Type
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.
SD and SDIO do not support SDR50, SDR104, and DDR50 modes.
(40)
DDR timing is optional for MMCPlus, MMCMobile, and eMMC; but not supported for MMC and RSMMC.
(41)
(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.
SDR25 speed mode requires 1.8-V signaling. Note that even if a card supports UHS-I modes (for example
(43)
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.
Altera Corporation
on page 14-3
Voltages Bus Modes
(42)
Supported Supported
(44)
3.0 V 1.8 V 1 bit
√
√ √
√ √
√ √
√ √
√ √
Default
Speed
4 bit 8 bit 12.5 MBps
25 MHz
√
√ √
√ √
√ √
√ √
√ √ √
Bus Speed Modes Supported
High Speed SDR12
25 MBps 12.5 MBps
50 MHz 25 MHz
√
√ √
√ √
√ √
√ √
√ √
cv_5v4
2016.10.28
(43)
SDR25
25 MBps
50 MHz
√
√
√
√
√
SD/MMC Controller
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