Datasheet

- 8 -
datasheet SD Card
Rev. 1.0
MMBTFxxGWBCA-xMExx
4.3.2 CID Register
The Card IDentification (CID) register is 128 bits wide. It contains the card identification information used during the card identification phase. Every indi-
vidual Read/Write (RW) card shall have an unique identification number. It is programmed during manufacturing and cannot be changed by card hosts.
The structure of the CID register is defined in the following paragraphs:
[Table 4-5] : CID Register Fields
Name Field Type Width
CID Value
4GB 8GB 16GB
Manufacturer ID MID Binary 8
CID Register Value can be provided by Customer Request
OEM/Application ID OID ASCII 16
Product name PNM ASCII 40
Product revision PRV BCD 8
Product serial number PSN Binary 32
Reserved - - 4
Manufacturing date MDT BCD 12
CRC7 checksum CRC Binary 7
not used, always ’1’ - - 1