MIFARE Series 4-composition

text/Shing original Reprint Please specify the source http://blog.csdn.net/yxstars/article/details/38081241

The Mifare IC chip contains EEPROM, RF interface and digital control unit.

1. RF RF Interface

In the RF RF interface circuit, mainly includes the waveform conversion module. It can receive the 13.56MHZ radio modulation frequency on the card reader, on the one hand the modulation/demodulation module, on the other hand, the waveform conversion, the sine wave into a square wave, and then the rectifier filter, by the voltage regulator module for further processing, including the voltage regulator, the final output of the card on the circuit. The Por module mainly power-on-reset the various circuits on the card (power-on reset), so that each circuit is started synchronously.

2. Digital Circuit

The digital circuit section mainly includes: ATRmodule, anticollisionmodule, Select applicationmodule, Control & Arithmetic unit, Ram/romunit, Crypto unit.

Control & Arithmetic Unit (Control and arithmetic unit) This module is the center of the entire card, the "mind" of the card. It mainly carries on the micro-operation control to each unit of the whole card, coordinates each step of the card, simultaneously it also carries on the arithmetic operation processing, increment/decrement processing, the CRC computation processing, and so on various collect/send data. is a central microprocessor (MCU) unit built into the card.

Ram mainly with the control and arithmetic units, the results of the operation of the temporary storage, if some data need to be stored in the EEPROM, the control and arithmetic units are removed to the EEPROM memory, if some data need to be transmitted to the reader, the control and arithmetic unit is removed, The RF RF interface circuit is processed and transmitted to the card reader via the antenna on the card. The data in RAM is cleared after the card loses power (the card leaves the active operating range of the reader antenna). At the same time, the ROM also cures the necessary program instructions for the card to run, and the control and arithmetic units are removed to control the micro-command of each unit. Enables the card to methodically communicate with the reader and reader of the card.

Crypto Unit (Data Encryption unit) completes the Data encryption processing and password protection. Cryptographic algorithms can be either des standard algorithms or others.

3. Eerom

This unit is primarily used to store data. The data in the EEPROM will still be maintained after the card loses power (the card leaves the active working range of the reader antenna). The data that the user wants to store is stored in the unit.

MIFARE Series 4-Composition (RPM)