The last 7 bits of the CID (bits 7:1) contain a checksum. Advanced decoders verify this CRC. If the CRC is invalid, the CID may have been corrupted due to a bad read or failing chip.
Shows the month and year the chip was produced. Key Use Cases emmc cid decoder
Manufacturer: Samsung (0x15) Product Name: 4GBU Revision: 0.1 Serial Number: 5903040 Date: 2018-08 The last 7 bits of the CID (bits 7:1) contain a checksum
Tools like or Flash Extractor include advanced decoders that also validate CRC and parse extended CSD registers linked to the CID. emmc cid decoder
"Unknown Manufacturer ID"
#!/usr/bin/env python3 # eMMC CID Decoder import sys