CIRFIFO=CIRFIFO_0, RDMO=RDMO_0, HRPOL=HRPOL_0, HREN=HREN_0, HRSEL=HRSEL_0
Master Configuration Register 0
| HREN | Host Request Enable 0 (HREN_0): Host request input is disabled 1 (HREN_1): Host request input is enabled |
| HRPOL | Host Request Polarity 0 (HRPOL_0): Active low 1 (HRPOL_1): Active high |
| HRSEL | Host Request Select 0 (HRSEL_0): Host request input is pin HREQ 1 (HRSEL_1): Host request input is input trigger |
| CIRFIFO | Circular FIFO Enable 0 (CIRFIFO_0): Circular FIFO is disabled 1 (CIRFIFO_1): Circular FIFO is enabled |
| RDMO | Receive Data Match Only 0 (RDMO_0): Received data is stored in the receive FIFO 1 (RDMO_1): Received data is discarded unless the the Data Match Flag (MSR[DMF]) is set |