SanDisk SD Card

Revision 2.2Chapter 3 – SD Card Interface DescriptionSD Card Product Manual3.5.2 Card Identification RegisterThe Card Identification Register (CID) 12 is 16 bytes long and contains a unique cardidentification number as shown in Table 3-10. It is programmed during card manufacturingand cannot be changed by SD Card hosts.Table 3-10CID Register DefinitionsName Type Width CID-Slice CID Value CommentsManufacturer ID (MID) Binary 8 [127:120] 0x03 Manufacturer IDs arecontrolled andassigned by the SDCard AssociationOEM/Application ID (OID) ASCII 16 [119:104] SD ASCII Code0x53, 0x44Product Name (PNM) ASCII 40 [103:64] SD02GSD01GSD512SD256SD128SD64SD32SD16Product Revision 14 BCD 8 [63:56] ProductRevision xxSerial Number (PSN) Binary 32 [55:24] Product SerialNumberIdentifies the cardOEM and/or the cardcontents. The OID isassigned by the3C. 13Five ASCIIcharacters longTwo binary-codeddecimal digits32-bit unsignedintegerReserved --- 4 [23:20] --- ---Manufacture Date Code(MDT)BCD 12 [19:8] Manufacturedate (for ex.April 2001=0x014)Manufacturingdate—yym (offsetfrom 2000)CRC7 checksum (CRC) Binary 7 [7:1] CRC7* CalculatedNot used, always “1” --- 1 [0.0] --- ---*The CRC checksum is computed by using the following formula:CRC Calculation: G(x)=x 7+3+1M(x)=(MID-MSB)*x 119 +…+(CIN-LSB)*x 0CRC[6…0]=Remainder[(M(x)*x 7 )/G(x)]12 The CID Register in the SD Card has a different structure than in the MultiMediaCard.13 3C represents the three SDA founding companies: Toshiba, SanDisk, and MEI.14 The product revision is composed of two binary-coded decimal (BCD) digits (4 bits ea.) representing and “n.m”revision number. The “n” is the most significant nibble and the “m” is the least significant nibble. Example: thePRV binary value filed for product revision (6.2) would be “01100010”.© 2004 SanDisk Corporation 3-12 12/08/04