INTID=4_MODEM_STATUS, INTSTATUS=AT_LEAST_ONE_INTERRU
Interrupt ID Register. Identifies which interrupt(s) are pending.
| INTSTATUS | Interrupt status. Note that IIR[0] is active low. The pending interrupt can be determined by evaluating IIR[3:1]. 0 (AT_LEAST_ONE_INTERRU): At least one interrupt is pending. 1 (NO_INTERRUPT_IS_PEND): No interrupt is pending. |
| INTID | Interrupt identification. IER[3:1] identifies an interrupt corresponding to the USART Rx FIFO. All other values of IER[3:1] not listed below are reserved. 0 (4_MODEM_STATUS): 4 - Modem status 1 (3_THRE_INTERRUPT): 3 - THRE Interrupt. 2 (2A__RECEIVE_DATA_AV): 2a - Receive Data Available (RDA). 3 (1_RECEIVE_LINE_S): 1 - Receive Line Status (RLS). 6 (2B__CHARACTER_TIME_): 2b - Character Time-out Indicator (CTI). |
| RESERVED | Reserved, user software should not write ones to reserved bits. The value read from a reserved bit is not defined. |
| FIFOEN | These bits are equivalent to FCR[0]. |
| ABEOINT | End of auto-baud interrupt. True if auto-baud has finished successfully and interrupt is enabled. |
| ABTOINT | Auto-baud time-out interrupt. True if auto-baud has timed out and interrupt is enabled. |
| RESERVED | Reserved, user software should not write ones to reserved bits. The value read from a reserved bit is not defined. |