Here's an interpretation of the provided text:

1. Product Name:

- Must be a string

- Length: 5 ASCII characters maximum

2. Manufacturers Mentioned:

- SanDisk Corporation Ltd.

- Toshiba Corporation (Note that 'Toshiba' alone is likely meant, as it's commonly used in this context)

3. SD-3C LLC Information:

- Licenses companies to manufacture and/or sell SD Memory Cards

- Includes various types of cards such as flash memory, ROM, OTP, RAM, and SDIO Combo Cards

4. Card Identification (CID) Register Structure:

The CID register is 128 bits wide.

1. Manufacturer ID:

* Length: Fixed number of bytes (exact not specified)

* Identifies the manufacturer of the card

Every individual Read/Write (RW) card shall have a unique identification number.

2. Card Information:

- Contains information used during the card identification phase

3. Card Identification Code (CID):

This code is also known as the device or product ID and identifies the SD Memory Card uniquely among other cards from the same manufacturer.

4. Manufacturer's Serial Number (MSN)/Serial Number (SN) / Manufacturing Date:

* Length: Varies depending on space available in the CID register

Identifies each card produced during a single manufacturing process.

5. Version Information/Revision Level:

This field contains information about the type of controller used to create this particular SD Memory Card and its revision level, which can be used for future product improvements or bug fixes.

6. Manufacturer's ID (MID) / Organizationally Unique Identifier (OID):

* Length: 2 bytes

Identifies the card OEM and/or indicates what kind of information is stored in these two bytes when this field is not being used as part of a unique identifier for each SD Memory Card.

7. Device or Product Information:

This field contains additional manufacturer-specific information about the device, such as its name, revision level, etc.

8-15: Reserved (Not Used):

These 32 bits are reserved by the SD Association and must be set to all ones ('1111...') in any CID implementation.

The purpose of these fields is:

a) To ensure uniqueness among different cards from various manufacturers. This way, if there were two identical-looking cards with the same serial number (which could happen due to counterfeiting), they would still have a unique identifier based on their manufacturer ID and/or manufacturing date.

b) For backward compatibility reasons; older systems might not recognize newer types of memory devices unless they are identified correctly through these fields.

Change cid sd card sandisk