TS256M~2GUSD
2. CID Register
microSD Memory Card
A voltage range is not supported if the corresponding bit value is set to LOW. As long as the card is busy, the
corresponding bit (31) is set to LOW.
The Card IDentification (CID) register is 128 bits wide. It contains the card identification information used during the card
identification phase. Every individual flash card shall have a unique identification number. The structure of the CID
register is defined in the following paragraphs:
•
MID
An 8 bit binary number that identifies the card manufacturer. The MID number is controlled, defined and allocated to a
SD Memory Card manufacturer by the SD Group. This procedure is established to ensure uniqueness of the CID
register.
•
OID
A 2 ASCII string characters 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 Group. This procedure is established to ensure uniqueness of the CID register.
•
PNM
The product name is a string, 5 ASCII characters long.
•
PRV
The product revision is composed of two Binary Coded Decimal (BCD) digits, four bits each, representing an “n.m”
revision number. The “n” is the most significant nibble and “m” is the least significant nibble.
As an example, the PRV binary value field for product revision “6.2” will be: 0110 0010
•
PSN
The Serial Number is 32 bits of binary number.
Transcend Information Inc.
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TRANSCEND [ TRANSCEND INFORMATION. INC. ]
