decode_emmc_cid("fe014a4d4247474e036001cb0600e973")
To understand what an eMMC CID decoder does, it helps to look at the structure of the 128-bit register. The bits are mapped from Bit 0 to Bit 127 as follows: Field Name Size (Bits) Description (Manufacturer ID)
"Invalid CID length"
"Device does not expose CID"
The eMMC CID (Card Identification) number is a 128-bit unique identifier stored in the eMMC chip. It contains essential information about the memory card, such as the manufacturer, device type, and serial number. The CID number is used to identify and authenticate the eMMC chip, ensuring that the device is communicating with the correct memory card. emmc cid decoder
Quickly find out if the chip is from Samsung, SK Hynix, Micron, Kingston, or SanDisk.
# For internal eMMC (typically mmcblk0) cat /sys/block/mmcblk0/device/cid The CID number is used to identify and
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]