Emmc Cid Decoder [upd] -

| Bits | Field | Name | Description | | :--- | :--- | :--- | :--- | | [127:120] | MID | Manufacturer ID | 8-bit ID assigned by JEDEC (e.g., 0xFE = Samsung, 0x15 = Kingston) | | [119:112] | CBX | Card/BGA (OEM/Application) | Used by the manufacturer | | [111:104] | OID | OEM/Application ID | Identifies the OEM who built the card | | [103:96] | PNM (First 8 bits) | Product Name (Part 1) | First 8 bits of the product name (ASCII) | | [95:88] | PNM (Second 8 bits) | Product Name (Part 2) | | | [87:80] | PNM (Third 8 bits) | Product Name (Part 3) | | | [79:72] | PNM (Fourth 8 bits) | Product Name (Part 4) | | | [71:64] | PNM (Fifth 8 bits) | Product Name (Part 5) | | | [63:56] | PNM (Sixth 8 bits) | Product Name (Part 6) | | | [55:48] | PRV | Product Revision | Major/Minor revision (e.g., 0.1, 3.2) | | [47:40] | PSN (First 8 bits) | Product Serial Number (Part 1) | 32-bit unique serial number | | [39:32] | PSN (Second 8 bits) | Product Serial Number (Part 2) | | | [31:24] | PSN (Third 8 bits) | Product Serial Number (Part 3) | | | [23:16] | PSN (Fourth 8 bits) | Product Serial Number (Part 4) | | | [15:12] | MDT | Manufacturing Date | Year/Month of production | | [11:8] | (Reserved) | Reserved | Set to zero | | [7:1] | CRC | CRC7 | 7-bit checksum of CID fields | | [0] | (Reserved) | Always 1 | Fixed value |

In the world of embedded storage, the eMMC (embedded MultiMediaCard) is the silent workhorse powering billions of devices—from smartphones and tablets to Raspberry Pi boards, automotive infotainment systems, and industrial IoT modules. While users rarely interact with their storage directly, every eMMC chip carries a unique, immutable fingerprint known as the . emmc cid decoder

: Assigned by JEDEC (e.g., 0x15 for Samsung, 0x13 for Micron). Device/BGA | Bits | Field | Name | Description

A 6-character ASCII string representing the model name (e.g., "MAG2GA" or "KLMAG4"). Device/BGA A 6-character ASCII string representing the model

Here’s why decoding it matters, and how to do it.

If you have a Linux-based system (like Android), you can often find the raw CID at: /sys/block/mmcblk0/device/cid The Linux Kernel Archives Manual Decoding Logic Industrial eMMC 4.5 Specification - Farnell

| Bits | Field | Name | Description | | :--- | :--- | :--- | :--- | | [127:120] | MID | Manufacturer ID | 8-bit ID assigned by JEDEC (e.g., 0xFE = Samsung, 0x15 = Kingston) | | [119:112] | CBX | Card/BGA (OEM/Application) | Used by the manufacturer | | [111:104] | OID | OEM/Application ID | Identifies the OEM who built the card | | [103:96] | PNM (First 8 bits) | Product Name (Part 1) | First 8 bits of the product name (ASCII) | | [95:88] | PNM (Second 8 bits) | Product Name (Part 2) | | | [87:80] | PNM (Third 8 bits) | Product Name (Part 3) | | | [79:72] | PNM (Fourth 8 bits) | Product Name (Part 4) | | | [71:64] | PNM (Fifth 8 bits) | Product Name (Part 5) | | | [63:56] | PNM (Sixth 8 bits) | Product Name (Part 6) | | | [55:48] | PRV | Product Revision | Major/Minor revision (e.g., 0.1, 3.2) | | [47:40] | PSN (First 8 bits) | Product Serial Number (Part 1) | 32-bit unique serial number | | [39:32] | PSN (Second 8 bits) | Product Serial Number (Part 2) | | | [31:24] | PSN (Third 8 bits) | Product Serial Number (Part 3) | | | [23:16] | PSN (Fourth 8 bits) | Product Serial Number (Part 4) | | | [15:12] | MDT | Manufacturing Date | Year/Month of production | | [11:8] | (Reserved) | Reserved | Set to zero | | [7:1] | CRC | CRC7 | 7-bit checksum of CID fields | | [0] | (Reserved) | Always 1 | Fixed value |

In the world of embedded storage, the eMMC (embedded MultiMediaCard) is the silent workhorse powering billions of devices—from smartphones and tablets to Raspberry Pi boards, automotive infotainment systems, and industrial IoT modules. While users rarely interact with their storage directly, every eMMC chip carries a unique, immutable fingerprint known as the .

: Assigned by JEDEC (e.g., 0x15 for Samsung, 0x13 for Micron). Device/BGA

A 6-character ASCII string representing the model name (e.g., "MAG2GA" or "KLMAG4").

Here’s why decoding it matters, and how to do it.

If you have a Linux-based system (like Android), you can often find the raw CID at: /sys/block/mmcblk0/device/cid The Linux Kernel Archives Manual Decoding Logic Industrial eMMC 4.5 Specification - Farnell