Emmc Cid Decoder !exclusive!

A 7-bit checksum used to verify that the CID data has not been corrupted during transmission. Why Decoding Matters

Typical eMMC CID structure (MSB → LSB; total 128 bits): emmc cid decoder

# MID mid = cid_bytes[0] manufacturers = 0x15: "Samsung", 0x11: "Toshiba", 0xFE: "SanDisk", 0x45: "Sandisk", 0x03: "Hynix", 0x01: "Samsung", 0x00: "No manufacturer" print(f"Manufacturer ID (MID): 0xmid:02X (manufacturers.get(mid, 'Unknown'))") A 7-bit checksum used to verify that the

cid = "150100303136473332e03f5d9600b46d" # Typical interpretation: Value `y` = 1997 + y

# Byte 14: Manufacturing Date (MDT) mdt_raw = raw_bytes[14] # Month: bits 0:3 month = mdt_raw & 0x0F # Year: bits 4:7 (Offset from 1997 or 2000 depending on spec interpretation. # Commonly, 0 = 1997 for older MMC, but usually treated as offset from 2000 or 1997+year in modern context. # Typical interpretation: Value `y` = 1997 + y. year_val = (mdt_raw >> 4) & 0x0F