TFEST=0, TFUST=others, TFE=0, TFFST=0
Transmit FIFO Control Register
| TFE | Transmit FIFO Enable 0 (0): Transmit FIFO disabled 1 (1): Transmit FIFO enabled |
| TFUST | Transmit FIFO Unsent Message Number Status 0 (000): No unsent message 0 (others): Setting prohibited 1 (001): 1 unsent message 2 (010): 2 unsent messages 3 (011): 3 unsent messages 4 (100): 4 unsent messages |
| TFFST | Transmit FIFO Full Status 0 (0): Transmit FIFO is not full 1 (1): Transmit FIFO is full (4 unsent messages) |
| TFEST | Transmit FIFO Empty Status 0 (0): Unsent message in transmit FIFO 1 (1): No unsent message in transmit FIFO |