I have a problem getting the 16C73 controller out of sleep by use of
the USART synchronous slave receiver. Tests shows that
a character is received when sleep is not entered.
The controller also gets out of sleep by use of external signal on INT
pin.
My code is as follows:

/* Initialise serial port */
   SYNC  = 1;     /* Select synch mode */
   SPEN  = 1;     /* Enable serial port */
   CSRC  = 0;     /* Slave mode */
   GIE   = 0;     /* Disable interrupts */
   RCIE  = 1;     /* Enable wakeup */
   temp = RCREG;
   CREN  = 1;     /* Enable reception   */

/* TEST that receive works */
/* while (TRUE){                   */
/*    if(RCIF) nop();      */
/* }                       */

    sleep();      /* while waiting for synch data */
    nop();              /* Continue execution */


 If you can make any suggestions, I would  appreciate it.

Thank you,

Finn L. Amundsen