SSCR1_SFRMDIR
chip->cr1 |= SSCR1_SFRMDIR;
SSCR1_SFRMDIR |
| SSCR1_SFRMDIR | SSCR1_RWOT | SSCR1_TRAIL \
| SSCR1_SFRMDIR | SSCR1_RWOT | SSCR1_TRAIL \
~(SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR |
sscr1 |= SSCR1_SCLKDIR | SSCR1_SFRMDIR | SSCR1_SCFR;