On Android (rooted):
| Field | Bytes | Description | | :--- | :--- | :--- | | | 0 | Manufacturer ID. I mapped the most common IDs (Samsung, SanDisk, Toshiba, Micron) in the script. | | OID | 1-2 | OEM/Application ID. Usually 2 characters hex identifying the card customer or specific application. | | PNM | 3-8 | Product Name. ASCII string (up to 6 characters). Often model numbers like "BJTD4R" or "8GTF4". | | PRV | 9 | Product Revision. Binary Coded Decimal (BCD). 0x18 = Rev 1.8. | | PSN | 10-13 | Product Serial Number. A 32-bit unique integer. | | MDT | 14 | Manufacturing Date. 4 bits for Month (1-12), 4 bits for Year (Offset from 1997). | | CRC | 15 | Cyclic Redundancy Check. The script verifies this to ensure the CID is valid and not corrupted. |
A CID decoder breaks down the raw hex string into several standardized fields defined by the JEDEC eMMC standards :
Initial value: 0x00.
