PORT_TX_ENABLE
data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE | PORT_LEARN_DISABLE);
data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE);
data &= ~PORT_TX_ENABLE;
data &= ~PORT_TX_ENABLE;
data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);
data &= ~(PORT_TX_ENABLE | PORT_RX_ENABLE);
data |= (PORT_TX_ENABLE | PORT_RX_ENABLE);