CARD READER AND DATA PROCESSING METHOD IN CARD READER

PURPOSE: A card reader and a method for processing data on the same are provided to improve a processing speed and minimize an analysis error when the data of an RF(Radio Frequency) card is processed. CONSTITUTION: An RF card signal receiver(32) outputs the RF card data of a digital signal form by decoding an RF signal received from the RF card(10). An external interrupt part(38) tests that an external interrupt is generated if the card reader is activated under the predetermined control. A timer(36) provides a reference time to know a time interval for generating the external interrupt. A buffer(34) stores an order and the interval for generating the interrupt. A controller(40) activates the external interrupt part, and initializes the timer and the buffer if the RF card data is inputted. If the external interrupt is generated, the controller stores the order and the interval information of the generated external interrupt in the buffer, and decides a bit value of the corresponding bit by using the information stored in the buffer. 본 발명은 카드리더기에서의 알에프카드데이터 처리방법에 있어서, 알에프카드신호 수신부를 통해 알에프카드데이터가 입력되면 외부인터럽트부를 활성화시키고 타이머 및 버퍼를 초기화시키는 과정과, 상기 외부인터럽트부에서 외부인터럽트가 발생되면 상기 버퍼에 외부인터럽트의 발생순서 및 발생시간간격 정보를 저장하고 상기 버퍼에 저장된 정보를 이용하여 비트값을 결정하는 과정으로 이루어진다.