• OID
A 2-character ASCII string that identifies the card OEM and/or the card contents (when used as a distribution
media either on ROM or FLASH cards). The OID number is controlled, defined, and allocated to a SD Memory
Card manufacturer by the SD-3C, LLC. This procedure is established to ensure uniqueness of the CID register.
•PNM
The product name is a string, 5 ASCII characters long.
PNM can be customized by Transcend
• PRV
The product revision is composed of two Binary Coded Decimal (BCD) digits, four bits each, representing an
Ŷ.ŵ revision number. The Ŷ is the most significant nibble and ŵ is the least significant nibble.
As an example, the PRV binary value field for product revision 6.Ϯ will be: 0110 0010
• PSN
The Serial Number is 32 bits of binary number.
PSN Number can be customized by Transcend
• MDT
The manufacturing date composed of two hexadecimal digits, one is 8 bit representing the year(y)
and the other is four bits representing the month(m).
The ŵ field [11:8] is the month code. 1 = January.
The y field [19:12] is the year code. 0 = 2000.
As an example, the binary value of the Date field for production date April ϮϬϬϭ will be:
00000001 0100.
MDT can be customized by Transcend
• CRC
CRC7 checksum (7 bits).
3.3 CSD register
The following sections describe the CSD fields and the relevant data types for the standard and High Capacity
SD Memory Card. CSD Version 1.0 is applied Capacity SD Memory Card and CSD Version is applied to 2.0 is
applied to only the High Capacity SD Memory Card. The field name in parenthesis is set to fixed value and
indicates that the host is not necessary to refer these fields. The fixed values enables host, which refers to
these fields, to keep compatibility to CSD Version 1.0. The Cell Type field is coded as follows: R = readable, W(1)
= writable once, W = multiple writable.