/*
 * This module encapsulates the complete SIM socket block:
 * the actual socket, the bypass cap and our SIM_CD circuit.
 */

module sim_socket_block (GND, Vio, VSIM, SIM_CLK, SIM_RST, SIM_IO, SIM_CD);

input GND, Vio, VSIM;
input SIM_CLK, SIM_RST;
inout SIM_IO;
output SIM_CD;

wire SIM_CD_inverted;

sim_socket_wrap socket (.C1(VSIM),
			.C2(SIM_RST),
			.C3(SIM_CLK),
			.C5(GND),
			.C6(VSIM),
			.C7(SIM_IO),
			.SW1(GND),
			.SW2(SIM_CD_inverted)
		);

/* cap per Leonardo schematics */
capacitor C306 (VSIM, GND);

/* pull-up on the switch line */
resistor switch_pullup (SIM_CD_inverted, Vio);

/* inverting buffer for SIM_CD */
inv_buffer_74LVC1G04 inv (.GND(GND),
			  .Vcc(Vio),
			  .A(SIM_CD_inverted),
			  .Y(SIM_CD)
		);

/* bypass cap for the inverting buffer IC */
capacitor inv_bypass (Vio, GND);

endmodule