Texas Instruments TMS320C2XX - Manual (Page 391)

Transmitter Operation
9-23 Synchronous Serial Port
The continuous mode can be discontinued (changed to burst mode) only by
a serial-port or device reset. Changing the FSM bit during transmit or halt will
not necessarily cause a switch to burst mode.
Figure 9–7. Continuous Mode Transmission With External Frame Sync
B15
FSX
CLKX
DX
XINT
A15
MSB
A14 A13 A12 A11 A10 ... A0
LSB
XSR loaded
from buffer
B12 B14 B13
XSR loaded
from buffer