Being developed based on NXP s low power transponder ICs, HF RFID Module SL030 is a mini compact MIFARE® 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 in one PCB. In view of its maximum working current and sleep current are 45mA and 10uA respectively, SL030 is preferential for the applications which requires low power cost. Technology parameters for SL030 and SL031 are exactly the same except for communication interface: IIC for SL030 and UART for SL031.