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IC card memory architecture

Source:

1. Manufacturers

Manufacturer is the first memory of the first data segment (0), which contains the data based on the IC card manufacturers confidentiality and system security, after a period of programming in the IC card manufacturers are set to is write-protected.

2. Data segments

All the District contains 3 segments, each block of 16 bytes data is saved (the area 0 has two segments, and a read-only vendors). Data can be accessed by the following (access bits) configuration:

* Read and write: for example wireless access control

* Value: such as e-purse, it requires additional direct control commands like save value increases and decreases in the enforcement of any memory, action must be preceded by a confirmation before the command.

3. Tail section

Each district has a district, which includes:

* The keys a and b (optional), returns '0' when reading keys.

* Access to the conditions of this section 4 section (stored in the 6th ~ 9th bytes). Access (access bits) can also indicate that the data type (read/write, or value).

If you don't need the key b, paragraph 3 of the last 6 bytes as bytes of data. The 9th byte of the data the user can use this byte have access and byte 6, 7 and 8.


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