SanDisk SDSDH-1024 Product Manual - Page 32

Card Identification Register

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Revision 2.2 Chapter 3 - SD Card Interface Description SD Card Product Manual 3.5.2 Card Identification Register The Card Identification Register (CID)12 is 16 bytes long and contains a unique card identification number as shown in Table 3-10. It is programmed during card manufacturing and cannot be changed by SD Card hosts. Table 3-10 CID Register Definitions Name Manufacturer ID (MID) Type Binary Width 8 OEM/Application ID (OID) ASCII 16 Product Name (PNM) ASCII 40 Product Revision14 Serial Number (PSN) BCD 8 Binary 32 CID-Slice [127:120] [119:104] [103:64] [63:56] [55:24] CID Value 0x03 SD ASCII Code 0x53, 0x44 SD02G SD01G SD512 SD256 SD128 SD64 SD32 SD16 Product Revision xx Product Serial Number Comments Manufacturer IDs are controlled and assigned by the SD Card Association Identifies the card OEM and/or the card contents. The OID is assigned by the 3C.13 Five ASCII characters long Two binary-coded decimal digits 32-bit unsigned integer Reserved --- 4 Manufacture Date Code BCD 12 (MDT) CRC7 checksum (CRC) Not used, always "1" Binary 7 --- 1 [23:20] [19:8] [7:1] [0.0] --- Manufacture date (for ex. April 2001= 0x014) CRC7* --- --- Manufacturing date-yym (offset from 2000) Calculated --- *The CRC checksum is computed by using the following formula: CRC Calculation: G(x)=x7+3+1 M(x)=(MID-MSB)*x119+...+(CIN-LSB)*x0 CRC[6...0]=Remainder[(M(x)*x7)/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: the PRV binary value filed for product revision (6.2) would be "01100010". © 2004 SanDisk Corporation 3-12 12/08/04

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Chapter 3 – SD Card Interface Description
Revision 2.2
SD Card Product Manual
© 2004 SanDisk Corporation
3-12
12/08/04
3.5.2
Card Identification Register
The
Card Identification Register (CID)
12
is 16 bytes long and contains a unique card
identification number as shown in Table 3-10. It is programmed during card manufacturing
and cannot be changed by SD Card hosts.
Table 3-10
CID Register Definitions
Name
Type
Width
CID-Slice
CID Value
Comments
Manufacturer ID (MID)
Binary
8
[127:120]
0x03
Manufacturer IDs are
controlled and
assigned by the SD
Card Association
OEM/Application ID (OID)
ASCII
16
[119:104]
SD ASCII Code
0x53, 0x44
Identifies the card
OEM and/or the card
contents. The OID is
assigned by the
3C.
13
Product Name (PNM)
ASCII
40
[103:64]
SD02G
SD01G
SD512
SD256
SD128
SD64
SD32
SD16
Five ASCII
characters long
Product Revision
14
BCD
8
[63:56]
Product
Revision xx
Two binary-coded
decimal digits
Serial Number (PSN)
Binary
32
[55:24]
Product Serial
Number
32-bit unsigned
integer
Reserved
---
4
[23:20]
---
---
Manufacture Date Code
(MDT)
BCD
12
[19:8]
Manufacture
date
(for ex.
April 2001=
0x014)
Manufacturing
date—yym (offset
from 2000)
CRC7 checksum (CRC)
Binary
7
[7:1]
CRC7*
Calculated
Not used, always “1”
---
1
[0.0]
---
---
*The CRC checksum is computed by using the following formula:
CRC Calculation: G(x)=x
7+3+1
M(x)=(MID-MSB)*x
119
+…+(CIN-LSB)*x
0
CRC[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: the
PRV binary value filed for product revision (6.2) would be “01100010”.