UART_SCCM_RX
clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX);
clrbits16(&sccp->scc_sccm, UART_SCCM_RX);
if (events & UART_SCCM_RX)
clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX);
setbits16(&pinfo->sccp->scc_sccm, UART_SCCM_RX);
clrbits16(&sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX);
clrbits16(&pinfo->sccp->scc_sccm, UART_SCCM_TX | UART_SCCM_RX);