receiver input skew margin (RSKM) Definition

In designs that use the LVDS I/O standard, receiver input skew margin (RSKM) is the time margin available before the LVDS receiver Intel® FPGA IP fails to operate. RSKM is defined as the total time margin that remains after subtracting the sampling window (SW) size and the transmitter channel-to-channel skew (TCCS) from the time unit interval (TUI), as expressed in the following formula:

RSKM = (TUI - SW - TCCS) /2