| 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) |
An eMMC CID decoder is a powerful window into the hardware of your device. Whether you are trying to verify a replacement part, update your car’s navigation, or perform deep-level system debugging, understanding how to read the CID is a vital skill in the modern hardware landscape.
In forensic investigations, verifying the storage chip's exact serial number and manufacturing origin establishes a strict chain of custody. If a mobile device or embedded system is physically damaged, forensic examiners desolder the eMMC chip (chip-off technique) and read the CID to match it against official device manifests. Smartphone and Automotive Repair emmc cid decoder
While using an automated tool is easier, understanding the manual process is beneficial. 1. Obtain the CID
An eMMC CID decoder takes a 32-character hexadecimal string (which represents 16 bytes or 128 bits) and breaks it down into specific fields. The CID structure includes the following crucial information: Description | Bit Position | Field Name | Size
A typical Python decoding script would:
Quickly find out if the chip is from Samsung, SK Hynix, Micron, Kingston, or SanDisk. If a mobile device or embedded system is
An eMMC CID decoder automates the binary shifting and ASCII conversion required to read the raw hex. The most critical pieces of information it extracts include: 1. Manufacturer Identification (MID)