INTID=MODEM, INTSTATUS=INT
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 (INT): At least one interrupt is pending. 1 (NOINT): No interrupt is pending. |
| INTID | Interrupt identification. IER[3:1] identifies an interrupt corresponding to the UART Rx FIFO. All other combinations of IER[3:1] not listed below are reserved (100,101,111). 0 (MODEM): 4 - Modem interrupt. 1 (THRE): 3
2 (RDA): 2a
3 (RECEIVE): 1 - Receive Line Status (RLS). 6 (CTIMEOUT): 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. |