45010053454d303447d301d4935400b2
As you can see, manual decoding is tedious and error-prone. Hence, the need for a reliable eMMC CID decoder.
For dead devices or chip-off recovery, hardware programmers (like EasyJTAG, UFI Box, or Medusa Pro) feature built-in eMMC CID decoders. When the chip is inserted into the BGA socket, the software automatically reads the JEDEC registers and displays the decoded health, lifecycle, and manufacturing metrics in the logs. emmc cid decoder
If you can provide the you're looking to analyze, I can help you decode it and provide the manufacturer, production date, and model information . Project: Read, Collect & Decode SD Card CID Register Data
| Bit Position | Field Name | Size (bits) | Description | |--------------|------------|-------------|-------------| | [127:120] | MID | 8 | Manufacturer ID (JEDEC-assigned) | | [119:112] | CBX | 8 | Card/BGA (not widely used) | | [111:104] | OID | 8 | OEM/Application ID | | [103:96] | PNM (first char) | 8 | Product name (character 1) | | [95:88] | PNM (second char) | 8 | Product name (character 2) | | [87:80] | PNM (third char) | 8 | Product name (character 3) | | [79:72] | PNM (fourth char) | 8 | Product name (character 4) | | [71:64] | PNM (fifth char) | 8 | Product name (character 5) | | [63:56] | PNM (sixth char) | 8 | Product name (character 6) | | [55:48] | PRV | 8 | Product revision (BCD) | | [47:40] | PSN (byte 1) | 8 | Product serial number (MSB) | | [39:32] | PSN (byte 2) | 8 | Product serial number | | [31:24] | PSN (byte 3) | 8 | Product serial number | | [23:16] | PSN (byte 4) | 8 | Product serial number (LSB) | | [15:12] | MDT (year) | 4 | Manufacturing date (year) | | [11:8] | MDT (month) | 4 | Manufacturing date (month) | | [7:1] | CRC | 7 | CRC7 checksum | | [0] | - | 1 | Reserved (always 1) | When the chip is inserted into the BGA
When repairing devices with corrupted storage (such as "dead boot" scenarios in smartphones or automotive infotainment systems), technicians must replace the faulty eMMC chip. A decoder ensures the replacement chip matches the exact specifications, revision numbers, and organization required by the device's bootloader. 3. Detecting Counterfeit Memory
Raw CID data is pulled from devices as a 32-character hexadecimal string (e.g., 150100444d343132381234567890ac53 ). Without a decoder, interpreting this string requires manually segmenting the hex digits, converting bits to ASCII, and cross-referencing manufacturer lookup tables. A decoder ensures the replacement chip matches the
150100303136473332e03f5d9600b46d
If a memory chip fails, a technician cannot simply copy the data to a fresh eMMC; the system will reject the new chip due to a mismatched CID. Decoding the original CID allows specialists to find customizable "changeable CID" eMMC chips (often called Samsung developer cards) and program them to spoof the original hardware identity. Counterfeit and Wear-Leveling Verification
Once the raw CID data is obtained, it must be parsed according to the register map to be human-readable. The following tools automate this process:
For deeper control, compile mmc-utils (common on Ubuntu/Debian).