Sd/Mmc Controller Address Map And Register Definitions; Document Revision History - Altera Cyclone V Device Handbook

11-72

SD/MMC Controller Address Map and Register Definitions

The general steps to switch voltage level requires you to use a SD/MMC voltage-translation transceiver in
between the HPS and the SD/MMC card.
1. Power the HPS I/O pins for the SD/MMC controller to 3.3V.
a. Connect the same power supply to one of the transceiver voltage input pins.
2. Power the other transceiver voltage input pin with another power supply.
a. Connect this power supply with the SD/MMC card.
3. The SD/MMC will send predefined commands to check if the card supports dual voltage. The response
from the card will indicate if dual voltage is supported
4. Software stops all SD/MMC activity. If the card does not support dual voltage, do not perform the
remaining steps.
5. The GPIO on HPS sends a signal to the external power supply on the board notifying it to switch its
voltage value.
6. After voltage switching is completed, resume the SD/MMC activity.
SD/MMC Controller Address Map and Register Definitions
The address map and register definitions reside in the hps.html file that accompanies this handbook volume.
1. To view the module description and base address:
a. Click the link provided below to open the Address Map Information for Cyclone V SoC HPS file
b. Scroll to and click the sdmmc link
2. To then view the register and field descriptions, scroll to and click the register names. The register
addresses are offsets relative to the base address of each module instance.
Note: The base addresses of all modules are also listed in the Introduction to the Hard
Processor System chapter in volume 3 of the Cyclone
Related Information
• Introduction to Cyclone V Hard Processor System (HPS)
• Cyclone V SoC HPS Address Map and Register Definitions

Document Revision History

Table 11-33: Document Revision History
Date
December 2013
Altera Corporation
Version
2013.12.30
®
V Device Handbook.
on page 1-1
Changes
Maintenance release
cv_54011
2013.12.30
SD/MMC Controller
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