S_IO_SLEW3
#define M_IO_SLEW3 _SB_MAKEMASK(2, S_IO_SLEW3)
#define V_IO_SLEW3(x) _SB_MAKEVALUE(x, S_IO_SLEW3)
#define G_IO_SLEW3(x) _SB_GETVALUE(x, S_IO_SLEW3, M_IO_SLEW3)