Tx_Int
CSR_WRITE_1(sc, MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
CSR_WRITE_2(sc, MASK_REG, All_Int & ~(Rx_Int | Tx_Int));
while ((int_status = CSR_READ_1(sc, STATUS_REG)) & (Tx_Int | Rx_Int)) {
} else if (int_status & Tx_Int) {
CSR_WRITE_1(sc, STATUS_REG, Tx_Int);