UTCR0_DSS
#define UTCR0_7BitData (UTCR0_DSS*0) /* 7-Bit Data */
#define UTCR0_8BitData (UTCR0_DSS*1) /* 8-Bit Data */
utcr0 = UTCR0_DSS;
if (utcr0 & UTCR0_DSS)