Being developed based on NXP's transponder IC, HF RFID Module SL025M is a MIFARE OEM reader/writer. It supports MIFARE Classic® 1K, MIFARE Classic® 4K, MIFARE Ultralight® and is applicable for 13.56MHz. This embedded module does auto Real-time detecting tag which moves into or out of detective range and reports through one output pin's logic level. In addition, it integrates all necessary components and antenna into one PCB. The external Micro-controller can work with SL025M to read/write MIFARE cards by simple serial communication commands.