QUICC_REG_SCC_SCCE
scce = quicc_read2(bas, QUICC_REG_SCC_SCCE(c));
quicc_write2(bas, QUICC_REG_SCC_SCCE(c), ~0);
quicc_write2(bas, QUICC_REG_SCC_SCCE(bas->chan - 1), ~0);
scce = quicc_read2(bas, QUICC_REG_SCC_SCCE(bas->chan - 1));
quicc_write2(bas, QUICC_REG_SCC_SCCE(bas->chan - 1), ~0);