Contact Designation Use
C1 Vcc Power connection through which operating power is supplied to the microprocessor chip in the card
C2 RST Reset line through which the IFD can signal to the smart card's microprocessor chip to initiate its reset sequence of instructions
C3 CLK Clock signal line t hrough which a clock signal can be provided to the microprocessor chip. This line controls the operation speed and provides a common framework for data communication between the IFD and the ICC
C4 RFU Reserved for future use
C5 GND Ground line providing common electrical ground between the IFD and the ICC
C6 Vpp Programming power connection used to program EEPROM of first generation ICCs.
C7 I/O Input/output line that provides a half-duplex communication channel between the reader and the smart card
C8 RFU Reserved for future use