Secure Digital Card CID Decoder

by Gough Lui

Enter the CID as a hex string (as reported by cat /sys/block/device/mmcblk1/cid):
CID:

Decoded Result

Manufacturer ID: Controlled and assigned by SD Card Association

OEM/Application ID: Identifies OEM or card contents, set by Toshiba, SanDisk and MEI

Product Name: 5 ASCII Characters

Product Revision: 2 BCD Characters

Product Serial Number: 32-bit unsigned integer

Manufacturing Date: 3 BCD Characters YYM where actual year is is 2000+YY (although it seems some don't follow!)

CRC7 Checksum + always 1 in LSB: