Control B
| Bit7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
| TWI0 | SPI0 | USART0 | |||||
| Access | R/W | R/W | R/W | ||||
| Reset | 0 | 0 | 0 |
TWI 0 Communication
Write this bit to '1' to select alternative communication pins for TWI 0.
SPI 0 Communication
Write this bit to '1' to select alternative communication pins for SPI 0.
USART 0 Communication
Write this bit to '1' to select alternative communication pins for USART 0.