The PCMCIA Card Slave is to be used inside a PCMCIA card. This module interface with the PCMCIA card signals on one side and a user interface on this other side. The PCMCIA card input is sampled by the local clk input and all interface to the user side are synchronous with the local clock. All PCMCIA request except some control register accesses are passed to the user interface. CIS structure is on the user side accessed through a dedicated port. Several control registers, COR, CSR, PRR and SCR are implemented in the design. Access to other registers are forwarded to the user side.