Specifications

Physical Layer Simplified Specification Version 4.10

• Security Specification:

The specification describes the content protection mechanism and the application-specific commands

that support it.

• Physical Layer Specification (this document):

The specification describes the physical interface and the command protocol used by the SD Memory

Card. The purpose of the Physical Layer specification is to define the SD Memory Card, its

environment, and handling.

The document is divided into several portions. Chapter 3 gives a general overview of the system

concepts. The common SD Memory Card characteristics are described in Chapter 4. As this description

defines an overall set of card properties, we recommend using the product documentation in parallel.

The card registers are described in Chapter 5.

Chapter 6 defines the electrical parameters of the SD Memory Card's hardware interface.

Mechanical Specification described in Chapter 8 in Version 2.00 is moved to the Standard Size

Mechanical Addendum.

There are three mechanical addenda depend on form factors.

(1) Standard Size Mechanical Addendum

(2) miniSD Mechanical Addendum

(3) microSD Mechanical Addendum

UHS-II Interface Specification is defined by the UHS-II Addendum.

Un-removable memory device for embedded application is defined by the eSD Addendum.

As used in this document, "shall" or "will" denote a mandatory provision of the standard. "Should"

denotes a provision that is recommended but is not mandatory. "May" denotes a feature, which may or

may not be present–at the option of the implementer–and whose presence does not preclude

compliance.

• Mc-EX Interface Specification: (This section was added in version 1.10)

Part A1 of the SD memory card specification (Refer to Figure 1-1) serves as an extension to the SD

card Physical Layer Specification and provides all of the definitions required to transfer the Mobile

Commerce Extension (Mc-EX) command packets from the Mc-EX host to the Mc-EX enabled SD

memory card, and vice versa.

• SDIO Specification

SDIO card and embedded SDIO are specified based on the Physical Layer Specification and

modifications and extensions are described in the Part E1 SDIO Specification.