STM32H562VG datasheet(59/270 Pages) STMICROELECTRONICS

59 / 270 page

DS14258 Rev 5

59/270

STM32H562xx and STM32H563xx

Functional overview

3.40

Secure digital input/output and MultiMediaCards interface

(SDMMC)

The SD/SDIO, embedded MultiMediaCard (eMMC™) host interface (SDMMC) provides an

interface between the AHB bus and SD memory cards, SDIO cards, and eMMC devices.

The MultiMediaCard system specifications are available through the MultiMediaCard

association website at www.mmca.org, published by the MMCA technical committee.

SD memory card and SD I/O card system specifications are available through the SD card

association website at www.sdcard.org.

The SDMMC features include the following:

•

Compliance with Embedded MultiMediaCard System Specification Version 5.1

Card support for three different databus modes: 1-bit (default), 4-bit and 8-bit (HS200

SDMMC_CK speed limited to maximum allowed I/O speed, HS400 is not supported).

•

Full compatibility with previous versions of MultiMediaCards (backward compatibility).

•

Full compliance with SD memory card specifications version 6.0

(SDR104 SDMMC_CK speed limited to maximum allowed I/O speed, SPI mode and

UHS-II mode not supported).

•

Full compliance with SDIO card specification version 4.0

Card support for two different databus modes: 1-bit (default) and 4-bit (SDR104

SDMMC_CK speed limited to maximum allowed I/O speed, SPI mode and UHS-II

mode not supported).

•

Data transfer up to 208 Mbyte/s for the 8-bit mode, depending maximum allowed I/O

speed.

•

Data and command output enable signals to control external bidirectional drivers

•

IDMA linked list support

The MultiMediaCard/SD bus connects cards to the host.

The current version of the SDMMC supports only one SD/SDIO/eMMC card at any one time

and a stack of eMMC.

Table 12. SDMMC features

Mode/feature(1)

1. X = supported.

SDMMC1

SDMMC2

Variable delay (SDR104, HS200)

SDMMC_CKIN

SDMMC_CDIR, SDMMC_D0DIR

SDMMC_D123DIR

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