The full name of M1 card is NXP Mifare1 series. There are two commonly used models, S50 and S70. At present, domestic chips are compatible with M1 cards, which belong to non-contact IC cards. The most important advantage is a multi-function card that can be read and written and has high security. These advantages are inseparable from its own structure.

Key indicators

8K bit EEPROM (Electrically Erasable Programmable Read Only Memory)

It is divided into 16 sectors, each sector is 4 blocks, each block is 16 bytes, and the access unit is block

Each sector has an independent set of passwords and access control

Each card has a unique serial number, which is 32 digits

It has an anti-collision mechanism and supports multi card operation

No power supply, with antenna, including encryption control logic and communication logic circuit

The data is stored for 10 years, and can be rewritten for 100000 times and read for unlimited times

Working temperature: - 20 ℃~50 ℃ (90%)

Operating frequency: 13.56MHZ

Communication rate: 106KBPS

Reading and writing distance: within 10mm (related to the reader writer)