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IC card memory architecture


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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