DMS=IDLE
Receive FIFO 1 Status Register
| F1FL | Receive FIFO 1 Fill Level |
| F1GI | Receive FIFO 1 Get Index |
| F1PI | Receive FIFO 1 Put Index |
| F1F | Receive FIFO 1 Fill Level |
| RF1L | Receive FIFO 1 Message Lost |
| DMS | Debug Message Status 0 (IDLE): Idle state, wait for reception of debug messages, DMA request is cleared. 1 (MSG_A): Debug message A received. 2 (MSG_AB): Debug messages A, B received. 3 (MSG_ABC): Debug messages A, B, C received, DMA request is set. |