SPBYT=0, SPFC=00, SPRDTD=0, SPLW=0
SPI Data Control Register
| SPFC | Number of Frames Specification 0 (00): 1 frame 1 (01): 2 frames 2 (10): 3 frames 3 (11): 4 frames |
| SPRDTD | SPI Receive/Transmit Data Select 0 (0): Read SPDR/SPDR_HA values from receive buffer 1 (1): Read SPDR/SPDR_HA values from transmit buffer, but only if the transmit buffer is empty |
| SPLW | SPI Word Access/Halfword Access Specification 0 (0): Set SPDR_HA to valid for halfword access 1 (1): Set SPDR to valid for word access |
| SPBYT | SPI Byte Access Specification 0 (0): SPDR/SPDR_HA is accessed in halfword or word (SPLW is valid) 1 (1): SPDR_BY is accessed in byte (SPLW is invalid) |