CEA-2040-2011 SD Card Common Interface Standard《SD卡公用接口标准》.pdf
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1、 ANSI/CEA Standard SD Card Common Interface Standard ANSI/CEA-2040 July 2011 NOTICE Consumer Electronics Association (CEA) Standards, Bulletins and other technical publications are designed to serve the public interest through eliminating misunderstandings between manufacturers and purchasers, facil
2、itating interchangeability and improvement of products, and assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such Standards, Bulletins and other technical publications shall not in any respect preclude any member or nonmem
3、ber of CEA from manufacturing or selling products not conforming to such Standards, Bulletins or other technical publications, nor shall the existence of such Standards, Bulletins and other technical publications preclude their voluntary use by those other than CEA members, whether the standard is t
4、o be used either domestically or internationally. Standards, Bulletins and other technical publications are adopted by CEA in accordance with the American National Standards Institute (ANSI) patent policy. By such action, CEA does not assume any liability to any patent owner, nor does it assume any
5、obligation whatever to parties adopting the Standard, Bulletin or other technical publication. This CEA Standard is considered to have International Standardization implication, but the International Electrotechnical Commission activity has not progressed to the point where a valid comparison betwee
6、n the CEA Standard and the IEC document can be made. This Standard does not purport to address all safety problems associated with its use or all applicable regulatory requirements. It is the responsibility of the user of this Standard to establish appropriate safety and health practices and to dete
7、rmine the applicability of regulatory limitations before its use. This document is copyrighted by the Consumer Electronics Association (CEA) and may not be reproduced, in whole or part, without written permission. Federal copyright law prohibits unauthorized reproduction of this document by any mean
8、s. Organizations may obtain permission to reproduce a limited number of copies by entering into a license agreement with IHS (http:/). .Requests to reproduce text, data, charts, figures or other material should be made to the CEA. (Formulated under the cognizance of the CEAs R4.8 DTV Interface Subco
9、mmittee.) Published by CONSUMER ELECTRONICS ASSOCIATION 2011 Technology Fax 202-872-9161; Fax 202-828-3131; Internet http:/www.atsc.org DVB Registry: DVB Services Srl is 17A Ancienne Route, CH -1218 le Grand Saconnex, Switzerland; Internet http:/ SD Memory Card specifications: SD Association, c/o Gl
10、obal Inventures, Inc., 2400 Camino Ramon, Suite 375, San Ramon, CA 94583; Phone 925-275-6615; Fax 925-886-4870; Internet http:/www.sdcard.org Internet Engineering Task Force standards: IETF Secretariat, c/o Association Management Solutions, LLC (AMS), 48377 Fremont Blvd., Suite 117, Fremont, Califor
11、nia 94538; Phone: 510-492-4080; Fax: 510-492-4001; Internet: http:/www.ietf.org Internet Streaming Media Alliance specifications: CEA-2040 2 Internet Streaming Media Alliance, Presidio of San Francisco, P.O. Box 29920, 572 B Ruger Street, San Francisco, CA 94129-0920; Phone: 415-561-6276; Fax: 415-5
12、61-6120; Internet http:/www.isma.tv ISO standards: Library of Congress via http:/www.loc.gov/standards/iso639-2/langhome.html 3. Acronyms AU Access Unit CAS Conditional Access System CI Common Interface CID Card Identification register CP Copy Protection ECM Entitlement Control Message EMM Entitleme
13、nt Management Message ESP Encapsulating Security Payload, part of the IPsec protocol suite ESG Electronic Service Guide IP Internet Protocol PNM Product Name SAC Secure Authenticated Channel 4. Definitions Closed Recording Session A Recording Session that is not in progress and no data may be added
14、to it. Common Interface Module A small device, not working by itself, designed to run specialized conditional access processing in association with a Terminal. Open Recording Session A Recording Session that is in progress and data may be added to it. Recording Session The result of all the data rec
15、eived for a particular Service over a period of time. Service - A set of synchronized media streams delivered in a time-constrained or unconstrained manner for immediate consumption (during the reception). Terminal The television receiver (not including the CI Module) device with a CI Module interfa
16、ce CEA-2040 3 5. Overview 5.1 Architecture The reference architecture using the Common Interface Module is shown below: Figure 1 Terminal Architecture The CI Module based system consists of a Terminal and a CI Module. The Terminal provides the reception and decoding functionality whilst the CI Modul
17、e provides the decryption functionality. The Terminal and the CI Module are connected through the Common Interface. Please refer to the documentation of the applicable broadcast standard for a detailed description of the Terminal architecture and requirements. The Common Interface described in this
18、document supports (at minimum) the transfer of the encrypted authorization information as well as the encrypted audio/video/data streams to the CI Module, and the transfer of the decrypted audio/video/data streams back to the Terminal. The transfer from the CI Module to the Terminal may optionally b
19、e protected by a Secure Authenticated Channel (SAC). The Common Interface specified in this document allows independent operation of both Terminal and the CI Module. In the case that the CI Module is not present in the Terminal, the Terminal should be able to render only the unencrypted broadcast ch
20、annels. In case that the CI Module is present in the Terminal the encrypted broadcast channels shall be presented to the CI Module for decryption. This document focuses only on the CI Module aspects of the interface. It does not include the mass storage aspects of the SD card that remains unchanged
21、and is accessible through the standard SD Protocol. 5.2 Physical Interface The physical interface of the CI Module shall be as defined in 2. 5.3 Logical Interface The logical interface of the CI Module shall be as defined in 2. 5.4 Form Factor The form factor of the CI Module shall be the microSD fo
22、rm factor as defined in the 2. CEA-2040 4 6. Transport Protocol Communications between the Terminal and the CI Module shall consist of a series of pairs of write commands followed by read commands. All CI Module commands shall be formatted using the READ_SINGLE_BLOCK (CMD17), READ_MULTIPLE_BLOCK (CM
23、D18), WRITE_SINGLE_BLOCK (CMD24) and WRITE_MULTIPLE_BLOCK (CMD25) commands. The “multiple block” commands should be used for performance reasons. For all commands (CMD17, CMD18, CMD24 and CMD25), the “data address” on bits 39 to 8 (inclusive) shall be set to 0xFFFF. A read command shall immediately
24、follow the write command. If the CI Module is not ready to answer the command carried in the write command, it shall respond to the read command with a Status Word of 0x6E04 (Busy) and the Terminal shall issue the read command once more after waiting the period of time described in the delay field,
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