The M1 card is divided into 16 sectors, each sector consists of 4 blocks (block 0, block 1, block 2, block 3). (We also numbered 64 blocks of 16 sectors by absolute address number 0~ 63, the storage structure is shown below:
Block 0 Data block 0 Sector 0 Block 1 Data block 1 Block 2 Data block 2 Block 3 Password A access control password B Data block 3 Block 0 Data block 4 Sector 1 Block 1 Data block 5 Block 2 Data block 6 Block 3 Password A Access Control Password B Data Block 7 . . . Sector 15 0 Data Block 60 1 Data Block 61 2 Data Block 62
Block 0 of sector 0 (ie, absolute address 0 block), which is used to store the vendor code, has been cured and cannot be changed.
Block 0, block 1, and block 2 of each sector are data blocks that can be used to store data.
How IC card works
The electrical part of the card consists of only one antenna and ASIC.
Antenna: The antenna of the card is a coil with only a few sets of windings, which is suitable for packaging into IS0 cards.
ASIC: The card's ASIC consists of a high speed (106KB baud rate) RF interface, a control unit and an 8K bit EEPROM.
Working principle: The reader sends a set of electromagnetic waves of fixed frequency to the M1 card. The card has an LC series resonant circuit whose frequency is the same as the frequency emitted by the reader. Under the excitation of the electromagnetic wave, the LC resonant circuit generates resonance. There is a charge in the capacitor. At the other end of the capacitor, a single-pass electronic pump is connected to store the charge in the capacitor to another capacitor. When the accumulated charge reaches 2V, the capacitor can be used as The power supply provides operating voltages for other circuits, transmitting data from the card or accessing data from the reader.
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