For hardware design and verification engineers, professional tools like the from Prodigy Technovations offer real-time decoding of CID registers during bus transactions. These instruments can trigger on specific commands, responses, or CRC errors and provide instantaneous decoding of Command, Response, CID, CSD, and Ext CSD registers.
If you want to use a CID decoder, you first need to extract the raw 32-character hex string from your device. On Android or Linux Systems (via Terminal)
Reading a CID typically requires a direct connection via a PCI/IDE bus or an eMMC Programmer, as standard USB card readers often intercept and hide these low-level commands.
Manufacturer: Samsung (0x15) Product Name: 4GBU Revision: 0.1 Serial Number: 5903040 Date: 2018-08
: The decoder extracts the manufacturing month and year based on JEDEC's baseline calendar rules. Practical Applications of CID Decoding 1. Counterfeit and Cloning Detection
# Byte 15: CRC (CRC) crc_byte = raw_bytes[15]
A unique code assigned by JEDEC identifying the chip maker (e.g., Samsung, SK Hynix, SanDisk). [119:114] Reserved Reserved for future use. [113:112] (Device/Card Type) Identifies the card type (e.g., BGA chip or standard card). [111:104] OID (OEM/Application ID)
if __name__ == "__main__": # Example Usage logic if len(sys.argv) > 1: # Run from command line argument decode_emmc_cid(sys.argv[1]) else: # Interactive mode or Example print("Usage: python emmc_decoder.py <32-character-hex-string>") print("Running built-in example...")
This report explains the structure and decoding process for the eMMC Card Identification (CID) register, provides decoding algorithms, example decodes, and a small reference implementation in Python to parse a 128-bit CID value into human-readable fields.
A checksum used to verify data integrity during transmission. Always set to 1. Step-by-Step Manual Decoding Example
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For hardware design and verification engineers, professional tools like the from Prodigy Technovations offer real-time decoding of CID registers during bus transactions. These instruments can trigger on specific commands, responses, or CRC errors and provide instantaneous decoding of Command, Response, CID, CSD, and Ext CSD registers.
If you want to use a CID decoder, you first need to extract the raw 32-character hex string from your device. On Android or Linux Systems (via Terminal)
Reading a CID typically requires a direct connection via a PCI/IDE bus or an eMMC Programmer, as standard USB card readers often intercept and hide these low-level commands.
Manufacturer: Samsung (0x15) Product Name: 4GBU Revision: 0.1 Serial Number: 5903040 Date: 2018-08
: The decoder extracts the manufacturing month and year based on JEDEC's baseline calendar rules. Practical Applications of CID Decoding 1. Counterfeit and Cloning Detection
# Byte 15: CRC (CRC) crc_byte = raw_bytes[15]
A unique code assigned by JEDEC identifying the chip maker (e.g., Samsung, SK Hynix, SanDisk). [119:114] Reserved Reserved for future use. [113:112] (Device/Card Type) Identifies the card type (e.g., BGA chip or standard card). [111:104] OID (OEM/Application ID)
if __name__ == "__main__": # Example Usage logic if len(sys.argv) > 1: # Run from command line argument decode_emmc_cid(sys.argv[1]) else: # Interactive mode or Example print("Usage: python emmc_decoder.py <32-character-hex-string>") print("Running built-in example...")
This report explains the structure and decoding process for the eMMC Card Identification (CID) register, provides decoding algorithms, example decodes, and a small reference implementation in Python to parse a 128-bit CID value into human-readable fields.
A checksum used to verify data integrity during transmission. Always set to 1. Step-by-Step Manual Decoding Example
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