SCIFB2_SCK_MARK
SCIFB2_SCK_MARK, SCIFA2_CTS_N_MARK, DU2_DR7_MARK,
HSCK2_MARK, SCIFB2_SCK_MARK, ATARD1_N_MARK,
BPFCLK_MARK, SCIFB2_SCK_MARK,