Here’s a concise review of tools and methods, focusing on their utility, accuracy, and practical use cases.
| Field Name | Bits | Description | Example (Decoded) | | :--- | :--- | :--- | :--- | | | 8 bits | Manufacturer ID (Unique vendor code) | 0x11 = Toshiba / Kioxia | | CBX | 2 bits | Card/BGA (Package type) | 0x1 = BGA | | OID | 8 bits | OEM/Application ID (Manufacturer-assigned) | 0x01 | | PNM | 48 bits (6 bytes) | Product Name (ASCII string) | SEM32G | | PRV | 8 bits | Product Revision (Major/Minor BCD) | 0x10 = Revision 1.0 | | PSN | 32 bits (4 bytes) | Product Serial Number (Unique per chip) | 0x12345678 | | MDT | 12 bits | Manufacturing Date (Year + Month in BCD) | 0x193 = 2019, March | | CRC | 7 bits | CRC7 checksum (Data integrity) | 0x7B | emmc cid decoder
This article will serve as your complete encyclopedia. We will cover what the CID contains, why you would need to decode it, the step-by-step technical process for extracting and decoding the CID on various operating systems, and a list of tools you can use today. Here’s a concise review of tools and methods,
The most efficient "software" decoder isn't a third-party app, but the Linux kernel itself. If you have an eMMC device connected via an internal MMC controller (common in Chromebooks or Single Board Computers), you can read the raw hex data directly from the sysfs. cat /sys/block/mmcblkX/device/cid (Raw hex output) The most efficient "software" decoder isn't a third-party
This is a 12-bit field spread across the last two bytes. The formula is:
(Comprehensive CLI tool to both read and modify eMMC configurations)