MFRC522 chip introduction: MFRC522 utilizes advanced modulation and demodulation concepts and fully integrates all types of passive contactless communication methods and protocols at 13.56MHz. Supports 14443A compatible transponder signals. The digital part processes ISO14443A frames and error detection. In addition, it also supports the fast CRYPTO1 encryption algorithm for verification of MIFARE series products. MFRC522 supports MIFARE series higher-speed contactless communication, with a two-way data transmission rate of up to 424kbit/s. RFID radio frequency module circuit introduction: The card reader circuit is designed using the Philips MFRC522 original chip, which is easy to use and low cost. It is suitable for users of advanced applications such as equipment development and card reader development, and users who need to design/produce radio frequency card terminals. This module can be directly loaded into various card reader molds. The module uses a voltage of 3.3V, and can be directly connected to any user\'s CPU motherboard through a few simple lines of the SPI interface to communicate, which can ensure the module\'s stable and reliable operation and long card reading distance; The attachments include: RC522 RFID radio frequency module circuit schematic and PCB source file, which can be opened with AD software; RC522 Philips original code; Antenna calculation tool; Related reference materials, including test code, etc.;
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