Texas Instruments TMS320C645X - Manual (Page 14)

Emulation Halt Operation
General-Purpose Input/Output (GPIO) 14 SPRU724
Reading the SET_RIS_TRIG or CLR_RIS_TRIG register returns the value of
RIS_TRIG register. Reading from SET_FAL_TRIG and CLR_FAL_TRIG
register returns the value of FAL_TRIG register.
To use the GPIO pins as sources for CPU interrupts and EDMA events, bit 0
in the bank interrupt enable register (BINTEN) must be set to 1.
4 Emulation Halt Operation
The GPIO peripheral is not affected by emulation halts.
Interrupt and Event Generation / Interrupts and Events