regUNC_MAC2_A
READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A));
WRITE_REG(priv, regUNC_MAC2_A, val);
READ_REG(priv, regUNC_MAC1_A), READ_REG(priv, regUNC_MAC2_A));
macAddress[0] = READ_REG(priv, regUNC_MAC2_A);
macAddress[0] = READ_REG(priv, regUNC_MAC2_A);