_UTCR3
#define Ser1UTCR3 _UTCR3 (1) /* Ser. port 1 UART Control Reg. 3 */
#define Ser2UTCR3 _UTCR3 (2) /* Ser. port 2 UART Control Reg. 3 */
#define Ser3UTCR3 _UTCR3 (3) /* Ser. port 3 UART Control Reg. 3 */