Visible to Intel only — GUID: suc1442361261888
Ixiasoft
Visible to Intel only — GUID: suc1442361261888
Ixiasoft
3.3. SD/MMC Power Enable is Inverted
Description
The SD/MMC power enable was intended to function so that a logic high enabled power to the SD/MMC card and a logic low disabled the power. However, the SD/MMC power enable (SDMMC_PWR_ENA_HPS) and the BSEL[1] signal share the same dedicated I/O pin. When booting from the SD/MMC, BSEL[1] is pulled low during a power-on reset and it prevents the boot ROM from copying the second-stage boot loader from flash into on-chip RAM.
Workaround
There are three workaround options for this erratum:
- Force the power enable high on the board.
- Use a GPIO to control the power enable.
- Invert the power enable line on the board so that when software disables the power (SDMMC_PWR_ENA_HPS is high), the board inverts the signal to turn off the card.
Status
Affects: Intel® Arria® 10 SX devices
Status: No planned fix