Definition: The process of accessing and modifying the Card Identification (CID) register on SD cards for validation and traceability.
Explanation
Read and write CID refers to the capability to access and modify the unique Card Identification (CID) data stored on Secure Digital cards (microSD). This functionality is critical in environments where media identification, validation, and traceability are required during deployment. By reading the CID, systems can verify card authenticity and track individual cards throughout production workflows. Writing to the CID, where supported, allows customization or correction of card-level metadata to meet compliance or engineering needs.
Example
In an industrial SD card duplication workflow, the system reads the CID of each card to confirm its identity before copying data. After duplication, the CID can be written or validated to ensure traceability and quality control, preventing errors or counterfeit media from entering the supply chain.
Who This Is For
This term is relevant for engineers, quality control specialists, and IT professionals involved in SD card manufacturing, duplication, validation, and deployment processes where media traceability and compliance are critical.
Related Terms
CID, SD card duplication, media validation, traceability, bit-by-bit verification
Also Known As
CID read/write, Card Identification access, read CID, write CID