Emmc Cid Decoder Jun 2026

cat /sys/block/mmcblk0/device/csd # Card Specific Data cat /sys/block/mmcblk0/device/ocr # Operation Conditions Register cat /sys/block/mmcblk0/device/date # Manufacturing date cat /sys/block/mmcblk0/device/name # Device name (often from PNM field)

The is far more than a novelty. It transforms an obscure 128-bit identifier into actionable intelligence. Whether you are a hardware hacker trying to revive a dead router, a forensic analyst verifying data chain-of-custody, or an embedded engineer authenticating supply chain components, decoding the CID is a fundamental skill.

Before you can use an eMMC CID decoder tool, you must extract the raw hex string from your device. Here are the most common methods: Via Linux / Android (Root Access Required)

A standard eMMC CID string consists of 32 hexadecimal characters (16 bytes / 128 bits). The Joint Electron Device Engineering Council (JEDEC) defines the strict structure of these bits. The 128 bits are divided into several distinct fields: Field Name Description [127:120] Identifies the chip manufacturer (assigned by JEDEC). Device/Card Type [119:118] Defines the device type (e.g., BGA chip or standard card). OEM/Application ID [117:112] emmc cid decoder

Many open-source and developer-hosted sites offer instant decoding. You simply paste your 32-character hex string into a browser text box, and the script parses the variables instantly.

A 6-character ASCII string representing the model name (e.g., "MAG2GA" or "KLMAG4").

And with the open-source tools and explanations provided in this guide, you no longer have to stare at a 32-character hex string in confusion. Before you can use an eMMC CID decoder

For those performing "eMMC Pro" or "EasyJTAG" repairs, knowing the exact manufacturing date and revision can help in selecting the correct firmware (dump) to flash onto a bricked device.

: Encoded as two Binary Coded Decimal (BCD) digits—four bits each—representing a revision number in “n.m” format. For example, revision “6.2” would be encoded as binary 0110 0010 .

Whether you are diagnosing a or verifying a replacement part The 128 bits are divided into several distinct

The lsmmc utility, now merged into mmc-utils , was originally created by Sebastian Rasmussen. It provides an extensive parser for CID, CSD, and SCR registers and works directly with sysfs paths. Its key features include:

You can get the CID value from a Linux system using the following command (requires root): cat /sys/block/mmcblk0/device/cid This will output a long hex string, for example: 15010041353030313038313233343536 2. Breakdown Example ( 15010041353030313038313233343536 ) 0x15 corresponds to Samsung. OID (0100): OEM-specific identifier.

It’s a 128-bit fingerprint containing: