SDA1_B_MARK
SCL1_B_MARK, SDA1_B_MARK,
SCL1_B_MARK, SDA1_B_MARK,
SDA1_B_MARK, SCL1_B_MARK,
SDA1_B_MARK, SCL1_B_MARK,
SDA1_B_MARK, SCL1_B_MARK,
SCL1_B_MARK, SDA1_B_MARK,